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While the roots of a wheat plant are growing, the plant also accumulates an energy store in its stem, in the form of fructans, [14] which helps the plant to yield under drought and disease pressure, [15] but it has been observed that there is a trade-off between root growth and stem non-structural carbohydrate reserves. Root growth is likely to ...
Ears of compact wheat. Modern wheat varieties have been selected for short stems, the result of RHt dwarfing genes [14] that reduce the plant's sensitivity to gibberellic acid, a plant hormone that lengthens cells. RHt genes were introduced to modern wheat varieties in the 1960s by Norman Borlaug from Norin 10 cultivars of wheat grown in Japan ...
In 1988, the Israeli botanist Daniel Zohary and the German botanist Maria Hopf formulated their founder crops hypothesis. They proposed that eight plant species were domesticated by early Neolithic farming communities in Southwest Asia (Fertile Crescent) and went on to form the basis of agricultural economies across much of Eurasia, including Southwest Asia, South Asia, Europe, and North ...
Wheat origins by repeated hybridization and polyploidy (e.g. "6N" means 6 sets of chromosomes per cell rather than the usual 2). Only a few of the wheat species involved are shown. The goatgrass species involved are not known for certain. [6] Aegilops is important in wheat evolution because of its
Vavilov's 1924 scheme suggested that plants were domesticated in China, Hindustan, Central Asia, Asia Minor, Mediterranean, Abyssinia, Central and South America. A Vavilov center or center of origin is a geographical area where a group of organisms, either domesticated or wild, first developed its distinctive properties. [1]
Agricultural history took a different path from the Old World as the Americas lacked large-seeded, easily domesticated grains (such as wheat and barley) and large domestic animals that could be used for agricultural labor. Rather than the practice which developed in the Old World of sowing a field with a single crop, pre-historic American ...
The oldest evidence for Indian agriculture is in north-west India at the site of Mehrgarh, dated ca. 7000 BCE, with traces of the cultivation of plants and domestication of crops and animals. [2] Indian subcontinent agriculture was the largest producer of wheat and grain.
(bottom) millet, wheat, rye, triticale. A cereal is a grass cultivated for its edible grain. Cereals are the world's largest crops, and are therefore staple foods. They include rice, wheat, rye, oats, barley, millet, and maize. Edible grains from other plant families, such as buckwheat and quinoa, are pseudocereals.