Study on the role of Chinese Ae. tauschii in the evolution of Chinese common wheat landraces
Deng Liu
Abstract
Deng Liu
Abstract
Commom wheat (Triticum aestivum L.,AABBDD,2n=42) originated from hybridization of tetraploid wheat (Triticum turgidum L.,AABB,2n=28) and diploid Aegilops tauschii coss.(DD,2n=14).An essential prerequisite for this evolutionary step was that the natural hybrids between tetraploid wheat and diploid Aegilops tauschii could produce relatively many filled-seeds with desirable germination,which was controlled by the FHSD gene(s) in Ae.tauschii.However,there was no FHSD gene(s) in Chinese Ae.tauschii.Thus,it was suggested that Chinese Ae.tauschii did not participate in the evolution procession of Chinese common wheat landraces.
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Commom wheat (Triticum aestivum L.,AABBDD,2n=42) originated from hybridization of tetraploid wheat (Triticum turgidum L.,AABB,2n=28) and diploid Aegilops tauschii coss.(DD,2n=14).An essential prerequisite for this evolutionary step was that the natural hybrids between tetraploid wheat and diploid Aegilops tauschii could produce relatively many filled-seeds with desirable germination,which was controlled by the FHSD gene(s) in Ae.tauschii.However,there was no FHSD gene(s) in Chinese Ae.tauschii.Thus,it was suggested that Chinese Ae.tauschii did not participate in the evolution procession of Chinese common wheat landraces.
Key concepts: Aegilops tauschii, Common wheat, Ploidy, Biology, Hybrid, Aegilops, Botany, Germination