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Hard Wheat
Durum wheat (), also called pasta wheat or macaroni wheat (''Triticum durum'' or ''Triticum turgidum'' subsp. ''durum''), is a tetraploid species of wheat. It is the second most cultivated species of wheat after common wheat, although it represents only 5% to 8% of global wheat production. It was developed by artificial selection of the domesticated emmer wheat strains formerly grown in Central Europe and the Near East around 7000 BC, which developed a naked, free-threshing form. Like emmer, durum wheat is awned (with bristles). It is the predominant wheat that grows in the Middle East. ''Durum'' in Latin means "hard", and the species is the hardest of all wheats. This refers to the resistance of the grain to milling, in particular of the starchy endosperm, implying dough made from its flour is weak or "soft". This makes durum favorable for semolina and pasta and less practical for flour, which requires more work than with hexaploid wheats like common bread wheats. Despite its ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
René Louiche Desfontaines
René Louiche Desfontaines (14 February 1750 – 16 November 1833) was a French botanist. Desfontaines was born near Tremblay, Ille-et-Vilaine , Tremblay in Brittany. He attended the Collège de Rennes and in 1773 went to Paris to study medicine. His interest in botany originated from lectures at the Jardin des Plantes given by Louis Guillaume Lemonnier. He excelled in his new interest and was elected to the French Academy of Sciences in 1783. He was also a member of the Académie Nationale de Médecine. Desfontaines spent two years in Tunisia and Algeria, returning with a large collection of plants. He wrote ''Flora Atlantica'' (1798–1799, 2 vols), which included 300 genera new to science. In addition, he worked also on ornithology, and presented the findings of his expeditions to Africa for one of the ''Memoires de L'Académie Royale des Sciences''. Although the ''Mémoire'' corresponds to the year 1787, it was not published until 1789 by L'Imprimerie Royal as part ... [...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 meios ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Couscous
Couscous ( '; ber, ⵙⴽⵙⵓ, translit=Seksu) – sometimes called kusksi or kseksu – is a Maghrebi dish of small steamed granules of rolled durum wheat semolina that is often served with a stew spooned on top. Pearl millet, sorghum, bulgur, and other cereals are sometimes cooked in a similar way in other regions, and the resulting dishes are also sometimes called couscous. Couscous is a staple food throughout the Maghrebi cuisines of Algeria, Tunisia, Mauritania, Morocco, and Libya. It was integrated into French and European cuisine at the beginning of the twentieth century, through the French colonial empire and the Pieds-Noirs of Algeria. In 2020, couscous was added to UNESCO's Intangible Cultural Heritage list. Etymology The word ''couscous'' (alternately ''cuscus'' or ''kuskus'') was first noted in early 17th century French, from Arabic kuskus, from kaskasa ‘to pound’, and is probably of Berber origin. The exact formation of the word presents some obscur ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tagliatelle
Tagliatelle (; from the Italian ''tagliare'', meaning "to cut") are a traditional type of pasta from the Emilia-Romagna and Marche regions of Italy. Individual pieces of ''tagliatelle'' are long, flat ribbons that are similar in shape to fettuccine and are traditionally about wide.''The Classic Italian Cookbook'', 1973 by Marcella Hazan ''Tagliatelle'' can be served with a variety of sauces, though the classic is a meat sauce or Bolognese sauce. Tagliatelle are traditionally made with egg pasta. The traditional ratio is one egg to one hundred grams of flour. Origins Legend has it that tagliatelle was created by a talented court chef, who was inspired by Lucrezia d'Este's hairdo on the occasion of her marriage to Annibale II Bentivoglio, in 1487. In reality, this was a joke invented by humorist Augusto Majani in 1931. The recipe was called ''tagliolini di pasta e sugo, alla maniera di Zafiran'' (tagliolini of pasta and sauce in the manner of Zafiran) and it was served on silve ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Orecchiette
Orecchiette (; singular ; ) are a pasta typical of Apulia, a region of Southern Italy. Their name comes from their shape, which resembles a small ear. Description An orecchietta has the shape of a small dome, with its center thinner than its edge, and with a rough surface. Like other kinds of pasta, orecchiette are made with durum wheat and water. Eggs are rarely used. In traditional Southern Italian home cooking, the dough is rolled, then cut into cubes. Each cube is pressed with a knife, dragging it on the board and making it curl (making a '' cavatello''). The shape is then inverted over the thumb. Names and variations In the vernacular of Taranto they are called , or . In Cisternino ''orecchiette'' are made with durum wheat; they are larger and take on a different shape, with deep internal ribs, very similar to an ear. They are defined — that is, "priest's ears". The typical dish of holidays is orecchiette with rabbit ragout. ''Cavatelli'', ''strascinati'' (, in the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Polyploidy
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 mei ... [...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] |
Diploid
Ploidy () is the number of complete sets of chromosomes in a cell, and hence the number of possible alleles for autosomal and pseudoautosomal genes. Sets of chromosomes refer to the number of maternal and paternal chromosome copies, respectively, in each homologous chromosome pair, which chromosomes naturally exist as. Somatic cells, tissues, and individual organisms can be described according to the number of sets of chromosomes present (the "ploidy level"): monoploid (1 set), diploid (2 sets), triploid (3 sets), tetraploid (4 sets), pentaploid (5 sets), hexaploid (6 sets), heptaploid or septaploid (7 sets), etc. The generic term polyploid is often used to describe cells with three or more chromosome sets. Virtually all sexually reproducing organisms are made up of somatic cells that are diploid or greater, but ploidy level may vary widely between different organisms, between different tissues within the same organism, and at different stages in an organism's life cycle. Half ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Polyploid
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] |
Hybrid (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] |
Winter Wheat
Winter wheat (usually ''Triticum aestivum'') are strains of wheat that are planted in the autumn to germinate and develop into young plants that remain in the vegetative phase during the winter and resume growth in early spring. Classification into spring wheat versus winter wheat is common and traditionally refers to the season during which the crop is grown. For winter wheat, the physiological stage of heading (when the ear first emerges) is delayed until the plant experiences vernalization, a period of 30 to 60 days of cold winter temperatures (0° to 5 °C; 32–41 °F). Winter wheat is usually planted from September to November (in the Northern Hemisphere) and harvested in the summer or early autumn of the next year. In some places (e.g. Chile) a winter-wheat crop fully 'completes' in a year's time before harvest. Winter wheat usually yields more than spring wheat. So-called "facultative" wheat varieties need shorter periods of vernalization time (15–30 days ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chromosome
A chromosome is a long DNA molecule with part or all of the genetic material of an organism. In most chromosomes the very long thin DNA fibers are coated with packaging proteins; in eukaryotic cells the most important of these proteins are the histones. These proteins, aided by chaperone proteins, bind to and condense the DNA molecule to maintain its integrity. These chromosomes display a complex three-dimensional structure, which plays a significant role in transcriptional regulation. Chromosomes are normally visible under a light microscope only during the metaphase of cell division (where all chromosomes are aligned in the center of the cell in their condensed form). Before this happens, each chromosome is duplicated ( S phase), and both copies are joined by a centromere, resulting either in an X-shaped structure (pictured above), if the centromere is located equatorially, or a two-arm structure, if the centromere is located distally. The joined copies are now called si ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
