The pigeon pea (''Cajanus cajan'') is a perennial

legume A legume () is a plant in the family Fabaceae (or Leguminosae), or the fruit or seed of such a plant. When used as a dry grain, the seed is also called a pulse. Legumes are grown agriculturally, primarily for human consumption, for livestock f ...

from the

family Family (from la, familia) is a Social group, group of people related either by consanguinity (by recognized birth) or Affinity (law), affinity (by marriage or other relationship). The purpose of the family is to maintain the well-being of its ...

Fabaceae The Fabaceae or Leguminosae,International Code of Nomenc ...

native to the

Old World The "Old World" is a term for Afro-Eurasia that originated in Europe , after Europeans became aware of the existence of the Americas. It is used to contrast the continents of Africa, Europe, and Asia, which were previously thought of by the ...

. The pigeon pea is widely cultivated in tropical and semitropical regions around the world, being commonly consumed in

South Asia South Asia is the southern subregion of Asia, which is defined in both geographical and ethno-cultural terms. The region consists of the countries of Afghanistan, Bangladesh, Bhutan, India, Maldives, Nepal, Pakistan, and Sri Lanka.;;;;;;;; ...

Southeast Asia Southeast Asia, also spelled South East Asia and South-East Asia, and also known as Southeastern Asia, South-eastern Asia or SEA, is the geographical United Nations geoscheme for Asia#South-eastern Asia, south-eastern region of Asia, consistin ...

Africa Africa is the world's second-largest and second-most populous continent, after Asia in both cases. At about 30.3 million km2 (11.7 million square miles) including adjacent islands, it covers 6% of Earth's total surface area ...

Latin America Latin America or * french: Amérique Latine, link=no * ht, Amerik Latin, link=no * pt, América Latina, link=no, name=a, sometimes referred to as LatAm is a large cultural region in the Americas where Romance languages — languages derived f ...

and the

Caribbean The Caribbean (, ) ( es, El Caribe; french: la Caraïbe; ht, Karayib; nl, De Caraïben) is a region of the Americas that consists of the Caribbean Sea, its islands (some surrounded by the Caribbean Sea and some bordering both the Caribbean Se ...

Etymology and other names

Scientific epithet

The scientific name for the

genus Genus ( plural genera ) is a taxonomic rank used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In the hierarchy of biological classification, genus com ...

''Cajanus'' and the

species In biology, a species is the basic unit of classification and a taxonomic rank of an organism, as well as a unit of biodiversity. A species is often defined as the largest group of organisms in which any two individuals of the appropriate s ...

''cajan'' derive from the

Malay Malay may refer to: Languages * Malay language or Bahasa Melayu, a major Austronesian language spoken in Indonesia, Malaysia, Brunei and Singapore ** History of the Malay language, the Malay language from the 4th to the 14th century ** Indonesi ...

word ''katjang'' meaning

in reference to the bean of the plant.

Common English names

English English usually refers to: * English language * English people English may also refer to: Peoples, culture, and language * ''English'', an adjective for something of, from, or related to England ** English national ide ...

they are commonly referred to as pigeon pea which originates from the historical utilization of the pulse as

pigeon Columbidae () is a bird family consisting of doves and pigeons. It is the only family in the order Columbiformes. These are stout-bodied birds with short necks and short slender bills that in some species feature fleshy ceres. They primarily ...

fodder Fodder (), also called provender (), is any agriculture, agricultural foodstuff used specifically to feed domesticated livestock, such as cattle, domestic rabbit, rabbits, sheep, horses, chickens and pigs. "Fodder" refers particularly to food g ...

Barbados Barbados is an island country in the Lesser Antilles of the West Indies, in the Caribbean region of the Americas, and the most easterly of the Caribbean Islands. It occupies an area of and has a population of about 287,000 (2019 estimate). ...

. The term Congo pea and Angola pea developed due to the presence of its cultivation in Africa and the association of its utilization with those of African descent. The names no-eye pea and red gram both refer to the characteristics of the seed, with no-eye pea in reference to the lack of a hilum on most varieties, unlike the

black-eyed pea The black-eyed pea or black-eyed bean is a legume grown around the world for its medium-sized, edible bean. It is a subspecies of the cowpea, an Old World plant domesticated in Africa, and is sometimes simply called a cowpea. The common commer ...

, and red gram in reference to the red color of most Indian varieties and gram simply referring to the plant being a

Internationally

Africa

Benin Benin ( , ; french: Bénin , ff, Benen), officially the Republic of Benin (french: République du Bénin), and formerly Dahomey, is a country in West Africa. It is bordered by Togo to the west, Nigeria to the east, Burkina Faso to the north ...

the pigeon pea is locally known as klouékoun in Fon, otinin in Ede and eklui in Adja. In

Cape Verde , national_anthem = () , official_languages = Portuguese , national_languages = Cape Verdean Creole , capital = Praia , coordinates = , largest_city = capital , demonym ...

they are called feijão Congo in

Cape Verdean creole Cape Verdean Creole is a Portuguese-based creole languages, Portuguese-based creole language spoken on the islands of Cape Verde. It is also called or by its native speakers. It is the native creole language of virtually all Cape Verdeans and ...

. In

Comoros The Comoros,, ' officially the Union of the Comoros,; ar, الاتحاد القمري ' is an independent country made up of three islands in southeastern Africa, located at the northern end of the Mozambique Channel in the Indian Ocean. It ...

and

Mauritius Mauritius ( ; french: Maurice, link=no ; mfe, label=Mauritian Creole, Moris ), officially the Republic of Mauritius, is an island nation in the Indian Ocean about off the southeast coast of the African continent, east of Madagascar. It incl ...

they are known as embrevade or ambrebdade in Comorian and Morisyen, respectively, in return originating from the Malagasy term for the plant amberivatry. In

Ghana Ghana (; tw, Gaana, ee, Gana), officially the Republic of Ghana, is a country in West Africa. It abuts the Gulf of Guinea and the Atlantic Ocean to the south, sharing borders with Ivory Coast in the west, Burkina Faso in the north, and To ...

they are known as aduwa or adowa in

Dagbani Dagbani (or Dagbane), also known as Dagbanli and Dagbanle, is a Gur language spoken in Ghana and Northern Togo. Its native speakers are estimated around 3,160,000. It is a compulsory subject in primary and junior high school in the Dagbon Kingdo ...

. In

Kenya ) , national_anthem = "Ee Mungu Nguvu Yetu"() , image_map = , map_caption = , image_map2 = , capital = Nairobi , coordinates = , largest_city = Nairobi , ...

and

Tanzania Tanzania (; ), officially the United Republic of Tanzania ( sw, Jamhuri ya Muungano wa Tanzania), is a country in East Africa within the African Great Lakes region. It borders Uganda to the north; Kenya to the northeast; Comoro Islands and ...

they are known as mbaazi in Swahili. In

Malawi Malawi (; or aláwi Tumbuka: ''Malaŵi''), officially the Republic of Malawi, is a landlocked country in Southeastern Africa that was formerly known as Nyasaland. It is bordered by Zambia to the west, Tanzania to the north and northeast ...

they are called nandolo in Chichewa. In

Nigeria Nigeria ( ), , ig, Naìjíríyà, yo, Nàìjíríà, pcm, Naijá , ff, Naajeeriya, kcg, Naijeriya officially the Federal Republic of Nigeria, is a country in West Africa. It is situated between the Sahel to the north and the Gulf o ...

pigeon peas are called fiofio or mgbụmgbụ in

Igbo Igbo may refer to: * Igbo people, an ethnic group of Nigeria * Igbo language, their language * anything related to Igboland, a cultural region in Nigeria See also * Ibo (disambiguation) * Igbo mythology * Igbo music * Igbo art * * Igbo-Ukwu, a ...

, waken-masar "''Egyptian bean''" or waken-turawa "''foreigner bean''" in

Hausa Hausa may refer to: * Hausa people, an ethnic group of West Africa * Hausa language, spoken in West Africa * Hausa Kingdoms, a historical collection of Hausa city-states * Hausa (horse) or Dongola horse, an African breed of riding horse See also * ...

, and otinli in

Yoruba The Yoruba people (, , ) are a West African ethnic group that mainly inhabit parts of Nigeria, Benin, and Togo. The areas of these countries primarily inhabited by Yoruba are often collectively referred to as Yorubaland. The Yoruba constitute ...

. In

Sudan Sudan ( or ; ar, السودان, as-Sūdān, officially the Republic of the Sudan ( ar, جمهورية السودان, link=no, Jumhūriyyat as-Sūdān), is a country in Northeast Africa. It shares borders with the Central African Republic t ...

they are known as adaseya, adasy and adasia.

Asia

India India, officially the Republic of India (Hindi: ), is a country in South Asia. It is the seventh-largest country by area, the second-most populous country, and the most populous democracy in the world. Bounded by the Indian Ocean on the so ...

the plant is known by various different names such as; Assamese: অৰহৰ (arahar),•

Bengali Bengali or Bengalee, or Bengalese may refer to: *something of, from, or related to Bengal, a large region in South Asia * Bengalis, an ethnic and linguistic group of the region * Bengali language, the language they speak ** Bengali alphabet, the w ...

: অড়হর (arahar) মিৰি মাহ (mirai-maha) •

Gujarati Gujarati may refer to: * something of, from, or related to Gujarat, a state of India * Gujarati people, the major ethnic group of Gujarat * Gujarati language, the Indo-Aryan language spoken by them * Gujarati languages, the Western Indo-Aryan sub- ...

: તુવેર (tuver) •

Hindi Hindi (Devanāgarī: or , ), or more precisely Modern Standard Hindi (Devanagari: ), is an Indo-Aryan language spoken chiefly in the Hindi Belt region encompassing parts of northern, central, eastern, and western India. Hindi has been de ...

: अरहर (arhar), तुवर (tuvar) •

Kannada Kannada (; ಕನ್ನಡ, ), originally romanised Canarese, is a Dravidian language spoken predominantly by the people of Karnataka in southwestern India, with minorities in all neighbouring states. It has around 47 million native s ...

: ತೊಗರಿ ಬೆಳೆ (togari bele), ತೊಗರಿ ಕಾಳು (togari kalu) • Konkani: तोरी (tori) •

Malayalam Malayalam (; , ) is a Dravidian language spoken in the Indian state of Kerala and the union territories of Lakshadweep and Puducherry (Mahé district) by the Malayali people. It is one of 22 scheduled languages of India. Malayalam was des ...

: ആഢകി (adhaki), തുവര (tuvara) • Manipuri: মাইৰোংবী (mairongbi) •

Marathi Marathi may refer to: *Marathi people, an Indo-Aryan ethnolinguistic group of Maharashtra, India *Marathi language, the Indo-Aryan language spoken by the Marathi people *Palaiosouda, also known as Marathi, a small island in Greece See also * * ...

: तूर (tur) • Nepali: रहर (rahar) • Oriya: ହର୍ ହର୍ (har-har), କାକ୍ଷୀ (kakshi), ତୁବର (tubara) •

Persian Persian may refer to: * People and things from Iran, historically called ''Persia'' in the English language ** Persians, the majority ethnic group in Iran, not to be conflated with the Iranic peoples ** Persian language, an Iranian language of the ...

: شاخول (shakhul) • Punjabi: ਦਿੰਗੇਰ (dinger) •

Tamil Tamil may refer to: * Tamils, an ethnic group native to India and some other parts of Asia **Sri Lankan Tamils, Tamil people native to Sri Lanka also called ilankai tamils **Tamil Malaysians, Tamil people native to Malaysia * Tamil language, nativ ...

: ஆடகி (adhaki), இருப்புலி (iruppuli), காய்ச்சி (kaycci), and துவரை (tuvarai) •

Telugu Telugu may refer to: * Telugu language, a major Dravidian language of India *Telugu people, an ethno-linguistic group of India * Telugu script, used to write the Telugu language ** Telugu (Unicode block), a block of Telugu characters in Unicode S ...

: ఆఢకి (adhaki), కంది (kandi), తొగరి (togari), తువరము (tuvaramu) •

Tibetan Tibetan may mean: * of, from, or related to Tibet * Tibetan people, an ethnic group * Tibetan language: ** Classical Tibetan, the classical language used also as a contemporary written standard ** Standard Tibetan, the most widely used spoken dial ...

: tu ba ri and in

Urdu Urdu (;"Urdu"
''

Philippines The Philippines (; fil, Pilipinas, links=no), officially the Republic of the Philippines ( fil, Republika ng Pilipinas, links=no), * bik, Republika kan Filipinas * ceb, Republika sa Pilipinas * cbk, República de Filipinas * hil, Republ ...

they are known as Kadios in

Filipino Filipino may refer to: * Something from or related to the Philippines ** Filipino language, standardized variety of 'Tagalog', the national language and one of the official languages of the Philippines. ** Filipinos, people who are citizens of th ...

and Kadyos in Tagalog.

The Americas

, they are known as guandul or gandul in

Spanish Spanish might refer to: * Items from or related to Spain: **Spaniards are a nation and ethnic group indigenous to Spain **Spanish language, spoken in Spain and many Latin American countries **Spanish cuisine Other places * Spanish, Ontario, Cana ...

, and feijão andu or gandu in

Portuguese Portuguese may refer to: * anything of, from, or related to the country and nation of Portugal ** Portuguese cuisine, traditional foods ** Portuguese language, a Romance language *** Portuguese dialects, variants of the Portuguese language ** Portu ...

all of which derive from

Kikongo Kongo or Kikongo is one of the Bantu languages spoken by the Kongo people living in the Democratic Republic of the Congo, the Republic of the Congo, Gabon and Angola. It is a tonal language. It was spoken by many of those who were taken from th ...

''wandu'' or from Kimbundu ''oanda''; both names referring to the same plant. In the

Anglophone Speakers of English are also known as Anglophones, and the countries where English is natively spoken by the majority of the population are termed the ''Anglosphere''. Over two billion people speak English , making English the largest language ...

regions of the

, like

Jamaica Jamaica (; ) is an island country situated in the Caribbean Sea. Spanning in area, it is the third-largest island of the Greater Antilles and the Caribbean (after Cuba and Hispaniola). Jamaica lies about south of Cuba, and west of His ...

, they are known as Gungo peas, coming from the more archaic

name for the plant ''congo pea,'' given to the plant because of its popularity and relation to

Sub-Saharan Africa Sub-Saharan Africa is, geographically, the area and regions of the continent of Africa that lies south of the Sahara. These include West Africa, East Africa, Central Africa, and Southern Africa. Geopolitically, in addition to the List of sov ...

.Carney, J. A. and Rosomoff, R. N. (2009) ''In the Shadow of Slavery. Africa’s Botanical legacy in the Atlantic World''. Berkeley: University of California Press In

Francophone French became an international language in the Middle Ages, when the power of the Kingdom of France made it the second international language, alongside Latin. This status continued to grow into the 18th century, by which time French was the l ...

regions of the Caribbean they are known as pois d' angole, pwa di bwa in

Antillean creole Antillean Creole (Antillean French Creole, Kreyol, Kwéyòl, Patois) is a French-based creole that is primarily spoken in the Lesser Antilles. Its grammar and vocabulary include elements of Carib, English, and African languages. Antillean Creol ...

and pwa kongo in

Haitian creole Haitian Creole (; ht, kreyòl ayisyen, links=no, ; french: créole haïtien, links=no, ), commonly referred to as simply ''Creole'', or ''Kreyòl'' in the Creole language, is a French-based creole language spoken by 10–12million people wor ...

. In

Suriname Suriname (; srn, Sranankondre or ), officially the Republic of Suriname ( nl, Republiek Suriname , srn, Ripolik fu Sranan), is a country on the northeastern Atlantic coast of South America. It is bordered by the Atlantic Ocean to the north ...

they are known as wandoe or gele pesi, the former of which is derived from the same source as its Spanish and Portuguese counterparts, the latter of which literally translates to 'yellow pea' from Dutch and

Sranan Tongo Sranan Tongo (also Sranantongo "Surinamese tongue," Sranan, Surinaams, Surinamese, Surinamese Creole) is an English-based creole language that is spoken as a ''lingua franca'' by approximately 550,000 people in Suriname. Developed originally amo ...

Oceania

Hawaii Hawaii ( ; haw, Hawaii or ) is a state in the Western United States, located in the Pacific Ocean about from the U.S. mainland. It is the only U.S. state outside North America, the only state that is an archipelago, and the only stat ...

they are known as pi pokoliko 'Puerto Rican pea' or pi nunu 'pigeon pea' in the

Hawaiian language Hawaiian (', ) is a Polynesian language of the Austronesian language family that takes its name from Hawaii, the largest island in the tropical North Pacific archipelago where it developed. Hawaiian, along with English, is an official language o ...

History and origin

Origin

The closest relatives to the cultivated pigeon pea are

Cajanus cajanifolia The genus ''Cajanus'' is a member of the plant family Fabaceae. There are 37 species, mainly distributed across Africa, Asia and Australasia. Species include the pigeon pea (''C. cajan''), which is a significant food crop. ''Cajanus'' species ...

Cajanus scarabaeoides ''Cajanus scarabaeoides'' is a flowering plant in the genus '' Cajanus''. Of the 32 different species within the genus ''Cajanus'', only one, '' C. cajan'' (pigeonpea), is cultivated. ''Cajanus scarabaeoides'' is the closest wild relative to ''C. ...

and Cajanus kerstingii, native to India and the latter West Africa respectively. Much debate exist over the geographical origin of the species, with some groups claiming origin from the

Nile river The Nile, , Bohairic , lg, Kiira , Nobiin: Áman Dawū is a major north-flowing river in northeastern Africa. It flows into the Mediterranean Sea. The Nile is the longest river in Africa and has historically been considered the longest rive ...

and

Western Africa West Africa or Western Africa is the westernmost region of Africa. The United Nations defines Western Africa as the 16 countries of Benin, Burkina Faso, Cape Verde, The Gambia, Ghana, Guinea, Guinea-Bissau, Ivory Coast, Liberia, Mali, Maurita ...

, and the other Indian origin. The two epicenters of genetic diversity exist in both Africa and India, but India is considered to be its primary center of origin with West Africa being considered a second major center of origin.

History

By at least 2,800 BCE in peninsular India, where its presumptive closest wild relatives ''Cajanus cajanifolia'' occurs in tropical deciduous woodlands, its cultivation has been documented. Archaeological finds of pigeon pea cultivation dating to about

14th century BC The 14th century BC was the century that lasted from the year 1400 BC until 1301 BC. Events * 1350 – 1250 BC: The Bajío phase of the San Lorenzo Tenochtitlán, San Lorenzo site in Mexico; large public buildings are constructed. * Pastoral nom ...

have also been found at the

Neolithic The Neolithic period, or New Stone Age, is an Old World archaeological period and the final division of the Stone Age. It saw the Neolithic Revolution, a wide-ranging set of developments that appear to have arisen independently in several parts ...

site of

Sanganakallu Sanganakallu () is an ancient archaeological site from the Neolithic period (circa 3000 BC). It is approximately 8 km from Bellary in eastern Karnataka. It is a group of hills south of a horseshoe shaped valley, with Kupgal to the north. I ...

Kalaburagi Kalaburagi, formerly known as Gulbarga, is a city in the Indian state of Karnataka. It is the administrative headquarters of the Kalaburagi district and is the largest city in the region of North Karnataka (Kalyana-Karnataka). Kalaburagi is 6 ...

and its border area

Tuljapur Tuljapur is a town with a municipal council in Osmanabad district in the Indian state of Maharashtra. It is the administrative seat of Tuljapur taluka. Tuljapur is the location of the annual Tulja Bhavani fair during Navaratri (September–Octo ...

(where the cultivation of African domesticated plants like

pearl millet Pearl millet (''Cenchrus americanus'', commonly known as the synonym ''Pennisetum glaucum''; also known as 'Bajra' in Hindi, 'Sajje' in Kannada, 'Kambu' in Tamil, 'Bajeer' in Kumaoni and 'Maiwa' in Hausa, 'Mexoeira' in Mozambique) is the most w ...

finger millet ''Eleusine coracana'', or finger millet, also known as ragi in India, kodo in Nepal, is an annual herbaceous plant widely grown as a cereal crop in the arid and semiarid areas in Africa and Asia. It is a tetraploid and self-pollinating species p ...

, and

Lablab ''Lablab purpureus'' is a species of bean in the family Fabaceae. It is native to Africa and it is cultivated throughout the tropics for food.Gopalpur and other South Indian states. From India it may have made its way to North-East Africa via Trans-Oceanic Bronze Age trade that allowed cross-cultural exchange of resources and agricultural products. The earliest evidence of pigeon peas in Africa was found in Ancient Egypt with the presence of seeds in Egyptian tombs dating back to around 2,200 BCE. From eastern Africa, cultivation spread further west and south through the continent, where by means of the

Trans-Atlantic slave trade The Atlantic slave trade, transatlantic slave trade, or Euro-American slave trade involved the transportation by slave traders of enslaved African people, mainly to the Americas. The slave trade regularly used the triangular trade route and i ...

, it reached the

Americas The Americas, which are sometimes collectively called America, are a landmass comprising the totality of North and South America. The Americas make up most of the land in Earth's Western Hemisphere and comprise the New World. Along with th ...

around the 17th century. Pigeon peas were reportedly introduced to Hawaii in 1824 by

James Macrae James Macrae (1677 – July 1744) was a Scottish seaman and administrator who served as the President of Fort St George from 1725 to 1730. He is known for naval exploits against the pirate Edward England and for reforming the administration of ...

with a few specimens reportedly becoming naturalized on the islands, but they wouldn't gain much popularity until later. By the early 20th century

Filipinos Filipinos ( tl, Mga Pilipino) are the people who are citizens of or native to the Philippines. The majority of Filipinos today come from various Austronesian ethnolinguistic groups, all typically speaking either Filipino, English and/or othe ...

and

Puerto Ricans Puerto Ricans ( es, Puertorriqueños; or boricuas) are the people of Puerto Rico, the inhabitants, and citizens of the Commonwealth of Puerto Rico and their descendants. Overview The culture held in common by most Puerto Ricans is referred t ...

began to emigrate from the

American Philippines The Insular Government of the Philippine IslandsThis form of the name appeared in the titles of U.S. Supreme Court cases, but was otherwise rarely used. See Costas v. Insular Government of the Philippine Islands, 221 U.S. 623, 1911. The Admini ...

and

Puerto Rico Puerto Rico (; abbreviated PR; tnq, Boriken, ''Borinquen''), officially the Commonwealth of Puerto Rico ( es, link=yes, Estado Libre Asociado de Puerto Rico, lit=Free Associated State of Puerto Rico), is a Caribbean island and Unincorporated ...

to work in sugarcane plantations in 1906 and 1901, respectively. Pigeon peas are said to have been popularized on the island by the Puerto Rican community where by the

First World War World War I (28 July 1914 11 November 1918), often abbreviated as WWI, was one of the deadliest global conflicts in history. Belligerents included much of Europe, the Russian Empire, the United States, and the Ottoman Empire, with fightin ...

their cultivation began, to expand on the island where they are stilled cultivated and consumed by locals.

Nutrition

Pigeon peas contain high levels of

protein Proteins are large biomolecules and macromolecules that comprise one or more long chains of amino acid residues. Proteins perform a vast array of functions within organisms, including catalysing metabolic reactions, DNA replication, respo ...

and the important

amino acid Amino acids are organic compounds that contain both amino and carboxylic acid functional groups. Although hundreds of amino acids exist in nature, by far the most important are the alpha-amino acids, which comprise proteins. Only 22 alpha am ...

methionine Methionine (symbol Met or M) () is an essential amino acid in humans. As the precursor of other amino acids such as cysteine and taurine, versatile compounds such as SAM-e, and the important antioxidant glutathione, methionine plays a critical ro ...

lysine Lysine (symbol Lys or K) is an α-amino acid that is a precursor to many proteins. It contains an α-amino group (which is in the protonated form under biological conditions), an α-carboxylic acid group (which is in the deprotonated −C ...

, and

tryptophan Tryptophan (symbol Trp or W) is an α-amino acid that is used in the biosynthesis of proteins. Tryptophan contains an α-amino group, an α- carboxylic acid group, and a side chain indole, making it a polar molecule with a non-polar aromatic ...

. The following table indicates completeness of nutritional profile of various amino acids within mature seeds of pigeon pea. Methionine + Cystine combination is the only limiting amino acid combination in pigeon pea. In contrast to the mature seeds, the immature seeds are generally lower in all nutritional values, however they contain a significant amount of vitamin C (39 mg per 100 g serving) and have a slightly higher fat content. Research has shown that the protein content of the immature seeds is of a higher quality.

Cultivation

Pigeon peas can be of a perennial variety, in which the crop can last three to five years (although the seed yield drops considerably after the first two years), or an annual variety more suitable for seed production.

Global production

World production of pigeon peas is estimated at 4.49 million tons. About 63% of this production comes from India. The total number of hectares grown to pigeon pea is estimated at 5.4 million. India accounts for 72% of the area grown to pigeon pea or 3.9 million hectares. Africa is the secondary centre of diversity and at present it contributes about 21% of global production with 1.05 million tons. Malawi, Tanzania, Kenya, Mozambique and Uganda are the major producers in Africa. The pigeon pea is an important

crop of rainfed agriculture in the semiarid tropics. The Indian subcontinent, Africa and Central America, in that order, are the world's three main pigeon pea-producing regions. Pigeon peas are cultivated in more than 25 tropical and subtropical countries, either as a sole crop or intermixed with

cereal A cereal is any Poaceae, grass cultivated for the edible components of its grain (botanically, a type of fruit called a caryopsis), composed of the endosperm, Cereal germ, germ, and bran. Cereal Grain, grain crops are grown in greater quantit ...

s, such as

sorghum ''Sorghum'' () is a genus of about 25 species of flowering plants in the grass family (Poaceae). Some of these species are grown as cereals for human consumption and some in pastures for animals. One species is grown for grain, while many othe ...

(''

Sorghum bicolor ''Sorghum bicolor'', commonly called sorghum () and also known as great millet, broomcorn, guinea corn, durra, imphee, jowar, or milo, is a Poaceae, grass species cultivated for its grain, which is used for food for humans, animal feed, and ethan ...

''),

(''Pennisetum glaucum''), or

maize Maize ( ; ''Zea mays'' subsp. ''mays'', from es, maíz after tnq, mahiz), also known as corn (North American and Australian English), is a cereal grain first domesticated by indigenous peoples in southern Mexico about 10,000 years ago. Th ...

(''Zea mays''), or with other legumes, such as

peanut The peanut (''Arachis hypogaea''), also known as the groundnut, goober (US), pindar (US) or monkey nut (UK), is a legume crop grown mainly for its edible Seed, seeds. It is widely grown in the tropics and subtropics, important to both small ...

s (''Arachis hypogea''). Being a legume capable of

symbiosis Symbiosis (from Greek , , "living together", from , , "together", and , bíōsis, "living") is any type of a close and long-term biological interaction between two different biological organisms, be it mutualistic, commensalistic, or parasit ...

with

Rhizobia Rhizobia are diazotrophic bacteria that fix nitrogen after becoming established inside the root nodules of legumes (Fabaceae). To express genes for nitrogen fixation, rhizobia require a plant host; they cannot independently fix nitrogen. In gene ...

, the bacteria associated with the pigeon pea enrich soils through symbiotic

nitrogen fixation Nitrogen fixation is a chemical process by which molecular nitrogen (), with a strong triple covalent bond, in the air is converted into ammonia () or related nitrogenous compounds, typically in soil or aquatic systems but also in industry. Atmo ...

. The crop is cultivated on marginal land by resource-poor farmers, who commonly grow traditional medium- and long-duration (5–11 months)

landrace A landrace is a domesticated, locally adapted, often traditional variety of a species of animal or plant that has developed over time, through adaptation to its natural and cultural environment of agriculture and pastoralism, and due to isolation ...

s. Short-duration pigeon peas (3–4 months) suitable for multiple cropping have recently been developed. Traditionally, the use of such input as fertilizers, weeding, irrigation, and pesticides is minimal, so present yield levels are low (average = ). Greater attention is now being given to managing the crop because it is in high demand at remunerative prices. Pigeon peas are very drought-resistant and can be grown in areas with less than 650 mm annual rainfall. With the maize crop failing three out of five years in drought-prone areas of

Kenya ) , national_anthem = "Ee Mungu Nguvu Yetu"() , image_map = , map_caption = , image_map2 = , capital = Nairobi , coordinates = , largest_city = Nairobi , ...

, a consortium led by the

International Crops Research Institute for the Semi-Arid Tropics The International Crops Research Institute for the Semi-Arid Tropics (ICRISAT) is an international organization which conducts agricultural research for rural development, headquartered in Patancheru (Hyderabad, Telangana, India) with several r ...

(ICRISAT) aimed to promote the pigeon pea as a drought-resistant, nutritious alternative crop.

Breeding

John Spence, a

botanist Botany, also called , plant biology or phytology, is the science of plant life and a branch of biology. A botanist, plant scientist or phytologist is a scientist who specialises in this field. The term "botany" comes from the Ancient Greek wo ...

and politician from

Trinidad and Tobago Trinidad and Tobago (, ), officially the Republic of Trinidad and Tobago, is the southernmost island country in the Caribbean. Consisting of the main islands Trinidad and Tobago, and numerous much smaller islands, it is situated south of ...

, developed several varieties of dwarf pigeon peas which can be harvested by machine, instead of by hand.

Genome sequence

The pigeon pea is the first seed legume plant to have its complete genome sequenced. The sequencing was first accomplished by a group of 31 Indian scientists from the

Indian Council of Agricultural Research The Indian Council of Agricultural Research (ICAR) is an autonomous body responsible for co-ordinating agricultural education and research in India. It reports to the Department of Agricultural Research and Education, Ministry of Agriculture. Th ...

. It was then followed by a global research partnership, the International Initiative for Pigeon pea Genomics (IIPG), led by

ICRISAT The International Crops Research Institute for the Semi-Arid Tropics (ICRISAT) is an international organization which conducts agricultural research for rural development, headquartered in Patancheru (Hyderabad, Telangana, India) with several r ...

with partners such as BGI–Shenzhen (China), US research laboratories like University of Georgia, University of California-Davis, Cold Spring Harbor Laboratory, and National Centre for Genome Resources, European research institutes like the National University of Ireland Galway. It also received support from the CGIAR Generation Challenge Program, US National Science Foundation and in-kind contribution from the collaborating research institutes. It is the first time that a CGIAR-supported research center such as ICRISAT led the genome sequencing of a food crop. There was a controversy over this as CGIAR did not partner with a national team of scientists and broke away from the Indo American Knowledge Initiative to start their own sequencing in parallel. The 616 mature

microRNA MicroRNA (miRNA) are small, single-stranded, non-coding RNA molecules containing 21 to 23 nucleotides. Found in plants, animals and some viruses, miRNAs are involved in RNA silencing and post-transcriptional regulation of gene expression. miRN ...

s and 3919 long non-codingRNAs sequences were identified in the genome of pigeon pea.

Dehulling

Various methodologies exist in order to remove the pulse from its shell. In earlier days hand pounding was common. Several traditional methods are used that can be broadly classified under two categories: the wet method and the dry method. The Wet method Involves water soaking, sun drying and dehulling. The Dry method Involves oil/water application, drying in the sun, and dehulling. Depending on the magnitude of operation, large-scale commercial dehulling of large quantities of pigeon pea into its deskinned, split version, known as toor

dal In Indian cuisine, ''dal'' (also spelled ''daal'' or ''dhal''; pronunciation: , Hindi: दाल, Urdu: ) are dried, split pulses (e.g., lentils, peas, and beans) that do not require soaking before cooking. India is the largest producer of pu ...

in Hindi, is done in mechanically operated mills.

Uses

In cuisine

Pigeon peas are both a food crop (dried peas, flour, or green vegetable peas) and a forage/cover crop. In combination with

cereals A cereal is any grass cultivated for the edible components of its grain (botanically, a type of fruit called a caryopsis), composed of the endosperm, germ, and bran. Cereal grain crops are grown in greater quantities and provide more food en ...

, pigeon peas make a well-balanced meal and hence are favored by nutritionists as an essential ingredient for balanced diets. The dried peas may be sprouted briefly, then cooked, for a flavor different from the green or dried peas. Sprouting also enhances the digestibility of dried pigeon peas via the reduction of indigestible sugars that would otherwise remain in the cooked dried peas.

Africa

In Cape Verde they make a soup with the dried pigeon peas called feijão Congo, after its own name, made with dried pigeon peas in a similar manner to Brazilian

feijoada ''Feijoada'' () is a stew of beans with beef and pork. The name ''feijoada'' comes from ''feijão'', 'bean' in Portuguese. It is widely prepared in the Portuguese-speaking world, with slight variations. The basic ingredients of feijoada are bean ...

. In Kenya and throughout the Swahili-speaking region of East Africa, pigeon peas are utilized in dishes such as , that is usually served for breakfast. In the

Enugu state Enugu State ( ig, Ȯra Enugu) is a state in the South-East geopolitical zone of Nigeria, bordered to the north by the states of Benue and Kogi, Ebonyi State to the east and southeast, Abia State to the south, and Anambra State to the west. T ...

of Nigeria, and igbo dish called Ẹchịcha or ''Achịcha'' is made with palm oil, cocoyam, and seasoning. It is also similar to other dishes from the state such as ''ayarya ji'' and ''fio-fio''. In

Ethiopia Ethiopia, , om, Itiyoophiyaa, so, Itoobiya, ti, ኢትዮጵያ, Ítiyop'iya, aa, Itiyoppiya officially the Federal Democratic Republic of Ethiopia, is a landlocked country in the Horn of Africa. It shares borders with Eritrea to the ...

, the pods, the young shoots and leaves, are cooked and eaten.

Asia

Dal Fry Tadka, Cumin Rice, Roasted Papad on the side

In India, it is one of the most popular

pulses In medicine, a pulse represents the tactile arterial palpation of the cardiac cycle (heartbeat) by trained fingertips. The pulse may be palpated in any place that allows an artery to be compressed near the surface of the body, such as at the nec ...

, being an important source of protein in a mostly vegetarian diet. It is the primary accompaniment to rice or

roti Roti (also known as chapati) is a round flatbread native to the Indian subcontinent. It is popular in India, Sri Lanka, Pakistan, Nepal, Bangladesh, Maldives, Myanmar, Malaysia, Indonesia, Singapore, Thailand, Guyana, Suriname, Jamaica, Trinid ...

and has the status of

staple food A staple food, food staple, or simply a staple, is a food that is eaten often and in such quantities that it constitutes a dominant portion of a standard diet for a given person or group of people, supplying a large fraction of energy needs and ...

throughout the length and breadth of India. In regions where it grows, fresh young pods are eaten as a vegetable in dishes such as ''sambar''. In the

Western Visayas Western Visayas ( hil, Kabisay-an Nakatundan; tl, Kanlurang Kabisayaan or ''Kanlurang Visayas'') is an administrative region in the Philippines, numerically designated as Region VI. It consists of six provinces (Aklan, Antique, Capiz, Guimara ...

region of the

, pigeon peas are the main ingredient of a very popular dish called "KBL" - an acronym for "Kadyos" (pigeon pea), "Baboy" (pork), and "Langka" (jackfruit). It is a savory soup with rich flavors coming from the pigeon peas, smoked pork preferably the legs or tail, and souring agent called batuan. Raw

jackfruit The jackfruit (''Artocarpus heterophyllus''), also known as jack tree, is a species of tree in the fig, mulberry, and breadfruit family (Moraceae). Its origin is in the region between the Western Ghats of southern India, all of Bangladesh, ...

meat is chopped and boiled to soft consistency, and serves as an extender. The violet color of the soup comes from the pigment of the variety commonly grown in the region.

The Americas

In the Caribbean coast of

Colombia Colombia (, ; ), officially the Republic of Colombia, is a country in South America with insular regions in North America—near Nicaragua's Caribbean coast—as well as in the Pacific Ocean. The Colombian mainland is bordered by the Car ...

, like the

Atlántico department Atlántico (, en, Atlantic) is a department of Colombia, located in northern Colombia with the Caribbean Sea to its north, the Bolívar Department to its west and south separated by the Canal del Dique, and the Magdalena Department to its eas ...

of Colombia, the

sopa de guandú con carne salada Sopa de guandú con carne salada (Pigeon pea The pigeon pea (''Cajanus cajan'') is a perennial legume from the family Fabaceae native to the Old World. The pigeon pea is widely cultivated in tropical and semitropical regions around the wor ...

(or simply "gandules") is made with pigeon peas, yam, plantain, yuca, and spices. During the week of

Semana santa Holy Week ( la, Hebdomada Sancta or , ; grc, Ἁγία καὶ Μεγάλη Ἑβδομάς, translit=Hagia kai Megale Hebdomas, lit=Holy and Great Week) is the most sacred week in the liturgical year in Christianity. In Eastern Churches, w ...

a sweet is made out of pigeon peas called ''dulce de guandules'' which is made by mashed and sweetened pigeon peas with origins in the

maroon Maroon ( US/ UK , Australia ) is a brownish crimson color that takes its name from the French word ''marron'', or chestnut. "Marron" is also one of the French translations for "brown". According to multiple dictionaries, there are var ...

community of

San Basilio de Palenque San Basilio de Palenque or Palenque de San Basilio, often referred to by the locals simply as Palenke, is a Palenque village and corregimiento in the Municipality of Mahates, Bolivar in northern Colombia. Palenque was the first free African to ...

. In the

Dominican Republic The Dominican Republic ( ; es, República Dominicana, ) is a country located on the island of Hispaniola in the Greater Antilles archipelago of the Caribbean region. It occupies the eastern five-eighths of the island, which it shares wit ...

, a dish made of rice and green pigeon peas called

moro de guandules Moro de guandules (Moorish pigeon peas) is a dish from the cuisine of the Dominican Republic, Dominican Republic served on holidays. The dish is typically cooked with long-grain rice, celery, bell peppers, red onion, garlic, oregano, thyme, cilan ...

is a traditional holiday food. In

Panama Panama ( , ; es, link=no, Panamá ), officially the Republic of Panama ( es, República de Panamá), is a transcontinental country spanning the southern part of North America and the northern part of South America. It is bordered by Cos ...

, pigeon peas are used in a dish called ''Arroz con guandú y coco'' or "rice with pigeon peas and coconut" traditionally prepared and consumed during the end of year holidays. In

, ''

arroz con gandules Arroz con gandules is a combination of rice, pigeon peas, and pork, cooked in the same pot with sofrito. This is Puerto Rico's national dish along with roasted pork. Preparation This dish is mainly served during Christmas season or for special oc ...

'' is made with

rice Rice is the seed of the grass species ''Oryza sativa'' (Asian rice) or less commonly ''Oryza glaberrima ''Oryza glaberrima'', commonly known as African rice, is one of the two domesticated rice species. It was first domesticated and grown i ...

and pigeon peas and

sofrito (Spanish, ), (Catalan), (Italian, ), or (Portuguese, ) is a basic preparation in Mediterranean, Latin American, Spanish, Italian and Portuguese cooking. It typically consists of aromatic ingredients cut into small pieces and sautéed or ...

which is a traditional dish, especially during Christmas season. Pigeon peas can also be made in to a stew called ''asopao de gandules'', with

plantain Plantain may refer to: Plants and fruits * Cooking banana, banana cultivars in the genus ''Musa'' whose fruits are generally used in cooking ** True plantains, a group of cultivars of the genus ''Musa'' * ''Plantaginaceae'', a family of flowerin ...

balls.

also uses pigeon peas instead of kidney beans in their

rice and peas Rice and peas (or peas and rice) is a traditional food within the West Indian Caribbean islands. The 'peas' are traditionally pigeon peas, but more often substituted with kidney beans, and the dish is frequently served with curry goat. In 1961, ...

dish, especially during the Christmas season.

and

Grenada Grenada ( ; Grenadian Creole French: ) is an island country in the West Indies in the Caribbean Sea at the southern end of the Grenadines island chain. Grenada consists of the island of Grenada itself, two smaller islands, Carriacou and Pe ...

have their own variant, called ''

pelau Pelau is a traditional rice dish of the West Indies (Guadeloupe, Dominica and Caribbean countries such as Trinidad and Tobago, Grenada, Barbados and Saint Vincent and the Grenadines). Main ingredients are meat (usually chicken or beef, rice, pigeon ...

'', which includes either beef or chicken, and occasionally pumpkin and pieces of cured pig tail. Unlike in some other parts of the Greater Caribbean, in

The Bahamas The Bahamas (), officially the Commonwealth of The Bahamas, is an island country within the Lucayan Archipelago of the West Indies in the Atlantic Ocean, North Atlantic. It takes up 97% of the Lucayan Archipelago's land area and is home to ...

pigeon peas are used in dried form, light brown in color to make the heartier, heavier, signature Bahamian staple dish "Peas 'n Rice."

Oceania

they are used to make a dish called ''gandule rice,'' also called ''godule rice,'' ''gundule rice'', and ''ganduddy rice'' originates on the island from the Puerto Rican community with historic ties to the island and is prepared in a similar manner to that of traditional Puerto Rican arroz con gandules.

Other uses

Agricultural

It is an important ingredient of animal feed used in West Africa, especially in Nigeria, where it is also grown. Leaves, pods, seeds and the residues of seed processing are used to feed all kinds of livestock. In the Congo pigeon peas are utilized as one of the main food forest and soil improvement crops after using a slash-and-burn fire technique called ''maala.'' Pigeon peas are in some areas an important crop for

green manure In agriculture, a green manure is a crop specifically produced to be incorporated into the soil while still green. Typically, the green manure's biomass is incorporated with a plow or disk, as is often done with (brown) manure. The primary goal ...

, providing up to 90 kg nitrogen per hectare. The woody stems of pigeon peas can also be used as firewood, fencing, thatch and as a source for rope fiber.

Medicinal

In the

Republic of Congo The Republic of the Congo (french: République du Congo, ln, Republíki ya Kongó), also known as Congo-Brazzaville, the Congo Republic or simply either Congo or the Congo, is a country located in the western coast of Central Africa to the w ...

the

Kongo Congo or The Congo may refer to either of two countries that border the Congo River in central Africa: * Democratic Republic of the Congo, the larger country to the southeast, capital Kinshasa, formerly known as Zaire, sometimes referred to a ...

, Lari, and

Dondo people The Dondo (also ''Badondo'') are a people of Central Africa. It is a sub-group of the Kongos. They mainly live in the south of the Republic of the Congo, in the north of Angola and in the south-west of the Democratic Republic of the Congo. Ref ...

use the sap of the leaves as an eyedrop for epilepsy. In Madagascar the branches have been used as a

teeth cleaning twig A teeth-cleaning twig (in India: ''datun'') is an oral hygiene tool made from a twig from a tree. It can help to prevent tooth decay Tooth decay, also known as cavities or caries, is the breakdown of teeth due to acids produced by bacteria ...

References

External links

*
Decoding of the Pigeonpea (Arhar) Genome by Indian Scientists
Indian Council of Agricultural Research *

Indian Council of Agricultural Research

Indian Council of Agricultural Research {{Taxonbar, from=Q632559 Phaseoleae Edible legumes Flora of India (region) Crops originating from India Nitrogen-fixing crops Tropical agriculture Taxa named by Carl Linnaeus