|
Wheat Taxonomy
During 10,000 years of cultivation, numerous forms of wheat, many of them hybrids, have developed under a combination of artificial and natural selection. This diversity has led to much confusion in the naming of wheats. This article explains how genetic and morphological characteristics of wheat influence its classification, and gives the most common botanical names of wheat in current use (see ). Information on the cultivation and uses of wheat is at the main wheat page. ''Aegilops'' and ''Triticum'' The genus '' Triticum'' includes the wild and domesticated species usually thought of as wheat. In the 1950s growing awareness of the genetic similarity of the wild goatgrasses (''Aegilops'') led botanists such as Bowden to amalgamate ''Aegilops'' and ''Triticum'' as one genus, ''Triticum''. This approach is still followed by some (mainly geneticists), but has not been widely adopted by taxonomists. ''Aegilops'' is morphologically highly distinct from ''Triticum'', with rounded ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
International Center For Agricultural Research In The Dry Areas
The International Center for Agricultural Research in the Dry Areas (ICARDA), a member of CGIAR, supported by the CGIAR Fund, is a non-profit agricultural research institute that aims to improve the livelihoods of the resource-poor across the world's dry areas. History ICARDA’s origins begin in April 1972 when the Technical Advisory Committee of GCIAR (then known as the Consultative Group on International Agricultural Research) expressed interest in agricultural research in the Near East and North Africa. TAC identified the semi-arid winter rainfall zone of the region as an important ecological area with specific crops and significant agricultural challenges which were not adequately addressed by any of the international agricultural research centers at the time. TAC selected Professor Dunstan Skilbeck to head a study during March and April of 1973. The Skilbeck Mission recommended the establishment of a new agricultural research center to deal with the agricultural issues o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cultivar
A cultivar is a type of cultivated plant that people have selected for desired traits and when propagated retain those traits. Methods used to propagate cultivars include: division, root and stem cuttings, offsets, grafting, tissue culture, or carefully controlled seed production. Most cultivars arise from purposeful human manipulation, but some originate from wild plants that have distinctive characteristics. Cultivar names are chosen according to rules of the International Code of Nomenclature for Cultivated Plants (ICNCP), and not all cultivated plants qualify as cultivars. Horticulturists generally believe the word ''cultivar''''Cultivar'' () has two meanings, as explained in '' Formal definition'': it is a classification category and a taxonomic unit within the category. When referring to a taxon, the word does not apply to an individual plant but to all plants that share the unique characteristics that define the cultivar. was coined as a term meaning "cultivated var ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hexaploid
Polyploidy is a condition in which the cells of an organism have more than one pair of ( homologous) chromosomes. Most species whose cells have nuclei ( eukaryotes) are diploid, meaning they have two sets of chromosomes, where each set contains one or more chromosomes and comes from each of two parents, resulting in pairs of homologous chromosomes between sets. However, some organisms are polyploid. Polyploidy is especially common in plants. Most eukaryotes have diploid somatic cells, but produce haploid gametes (eggs and sperm) by meiosis. A monoploid has only one set of chromosomes, and the term is usually only applied to cells or organisms that are normally diploid. Males of bees and other Hymenoptera, for example, are monoploid. Unlike animals, plants and multicellular algae have life cycles with two alternating multicellular generations. The gametophyte generation is haploid, and produces gametes by mitosis, the sporophyte generation is diploid and produces spores by ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
New Phytologist Foundation
New is an adjective referring to something recently made, discovered, or created. New or NEW may refer to: Music * New, singer of K-pop group The Boyz Albums and EPs * ''New'' (album), by Paul McCartney, 2013 * ''New'' (EP), by Regurgitator, 1995 Songs * "New" (Daya song), 2017 * "New" (Paul McCartney song), 2013 * "New" (No Doubt song), 1999 *"new", by Loona from '' Yves'', 2017 *"The New", by Interpol from ''Turn On the Bright Lights'', 2002 Acronyms * Net economic welfare, a proposed macroeconomic indicator * Net explosive weight, also known as net explosive quantity * Network of enlightened Women, a conservative university women's organization * Next Entertainment World, a South Korean film distribution company Identification codes * Nepal Bhasa language ISO 639 language code * New Century Financial Corporation (NYSE stock abbreviation) * Northeast Wrestling, a professional wrestling promotion in the northeastern United States Transport * New Orleans Lakefront A ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
New Phytologist
''New Phytologist'' is a peer-reviewed scientific journal published on behalf of the New Phytologist Foundation by Wiley-Blackwell. It was founded in 1902 by botanist Arthur Tansley, who served as editor until 1931. Topics covered ''New Phytologist'' covers all aspects of plant science, with topics ranging from intracellular processes through to global environmental change, including: * Physiology and development: intra/inter-cellular signalling, long-distance signalling, physiology, development, eco-devo - phenotypic plasticity, transport, biochemistry. * Environment: global change and Earth system functioning, environmental stress, ecophysiology, plant–soil interactions, heavy metals. * Interaction: multitrophic systems, mycorrhizas and pathogens, fungal genomics, nitrogen-fixing symbioses. * Evolution: molecular evolution, population genetics, mating systems, phylogenetics, speciation, plant-enemy coevolution. Article categories The journal publishes articles in the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aegilops Speltoides
''Aegilops speltoides'' ( syn. ''Sitopsis speltoides'' ( Tausch) Á.Löve) is an edible plant in the family Poaceae native to Southeastern Europe and Western Asia, which is often used for animal feed, and it has grown in cultivated beds. This plant is an important natural source of disease resistance in wheat Wheat is a grass widely cultivated for its seed, a cereal grain that is a worldwide staple food. The many species of wheat together make up the genus ''Triticum'' ; the most widely grown is common wheat (''T. aestivum''). The archaeologi ..., and it is known or likely to be susceptible to barley mild mosaic bymovirus. References Brunt, A.A., Crabtree, K., Dallwitz, M.J., Gibbs, A.J., Watson, L. and Zurcher, E.J. (eds.) (1996 onwards). External links *[...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Triticum Urartu
''Triticum urartu'', also known as red wild einkorn wheat, and a form of einkorn wheat Einkorn wheat (from German ''Einkorn'', literally "single grain") can refer either to a wild species of wheat (''Triticum'') or to its domesticated form. The wild form is '' T. boeoticum'' (syn. ''T. m.'' ssp. ''boeoticum''), the domesticated ..., is a grass species related to wheat, and native to western Asia. It is a diploid species whose genome is the A genome of the allopolyploid hexaploid bread wheat ''Triticum aestivum'', which has genomes AABBDD. References {{Taxonbar, from=Q15328587 Pooideae Wheat Cytogenetics ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hybridisation (biology)
In biology, a hybrid is the offspring resulting from combining the qualities of two organisms of different breeds, varieties, species or genera through sexual reproduction. Hybrids are not always intermediates between their parents (such as in blending inheritance), but can show hybrid vigor, sometimes growing larger or taller than either parent. The concept of a hybrid is interpreted differently in animal and plant breeding, where there is interest in the individual parentage. In genetics, attention is focused on the numbers of chromosomes. In taxonomy, a key question is how closely related the parent species are. Species are reproductively isolated by strong barriers to hybridisation, which include genetic and morphological differences, differing times of fertility, mating behaviors and cues, and physiological rejection of sperm cells or the developing embryo. Some act before fertilization and others after it. Similar barriers exist in plants, with differences in flowering tim ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Triticum Araraticum
''Triticum araraticum'' (Araratian wild emmer or Armenian wild emmer) is a wild tetraploid species of wheat. ''T. araraticum'' is one of the least studied wheat species in the world.E. D. Badaeva, R. L. Boguslavsky, N. S. Badaev and A. V. Zelenin. 1988. ''Intraspecific chromosomal polymorphism of Triticum araraticum (Poaceae) detected by C-banding technique''. Plant Systematics and Evolution. Vol. 169, No. 1/2 Genealogy The ''T. araraticum'' species appears to have arisen from the natural hybridization of T. boeoticum and Aegilops speltoides. ''T. araraticum'' is similar to the domestic T. timopheevii in several ways including physical appearance, cytoplasm type and DNA content.Jakubizner M. M. 1932. Wheats of Syria, Palestina, and Tranjordan, and their role in breeding and agronomy. WIR publ. p. 157-160 (in Russian) The relationship has led some taxonomists to classify ''T. araraticum'' as a subspecies of ''T. timopheevii''. In July 1988 different lines of ''T. araraticum'' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Triticum Dicoccoides
Emmer wheat or hulled wheat is a type of awned wheat. Emmer is a tetraploid (4''n'' = 4''x'' = 28 chromosomes). The domesticated types are ''Triticum turgidum'' subsp. ''dicoccum'' and ''Triticum turgidum ''conv.'' durum''. The wild plant is called ''Triticum turgidum'' subsp. ''dicoccoides''. The principal difference between the wild and the domestic is that the ripened seed head of the wild plant shatters and scatters the seed onto the ground, while in the domesticated emmer the seed head remains intact, thus making it easier for humans to harvest the grain. Along with einkorn wheat, emmer was one of the first crops domesticated in the Near East. It was widely cultivated in the ancient world, but is now a relict crop in mountainous regions of Europe and Asia. Emmer is considered a type of ''farro'' food especially in Italy. Taxonomy Strong similarities in morphology and genetics show that wild emmer (''Triticum dicoccoides'' Koern.) is the wild ancestor and a crop wild ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
.jpg "Click for more on -> Cultivar")
