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T* The origin of bread wheat (Triticum aestivum; AABBDD) has been a subject of controversy and of intense debate in the scientific community over the last few decades.In 2015, three articles published in New Phytologist discussed the origin of hexaploid bread wheat (AABBDD) from the diploid progenitors Triticum urartu (AA), a relative of Aegilops speltoides (BB) and Triticum tauschii (DD). Domestication of emmer wheat and evolution of free-threshing tetraploid wheat. Arbortext Advanced Print Publisher 9.1.510/W Unicode 0 0 1 rg Download Chapter 1 Wheat Evolution, Domestication, and Improvement PDF for free. BT <> Abstract. During this evolutionary process, rapid alterations and sporadic changes in wheat genome took place, due to hybridization, polyploidization, domestication, and mutation. ET (2016, April 5). 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