普通小麦物种迸化关系示意图 AAX BB Wild wheat A wild diploid wheat A wild diploid whea monococcum T.searsii? species AB (×2 AB A wild tetraploid whea Double genome AABB x DD A wild diploid wheat Cultivated 10,000 yr B.P.as Emmer wheat 00 AABB T.turgidum T.tauschii Dmmer wheat ABD ABD (×2-8000 yr ago】 Double genome Hexaploid wheat AABBDD T.aestivum Modern bread wheat an allohexaploid 普通小麦物种进化关系示意图 AA BB Wild wheat species X AB Double genome AABB × DD ABD Double genome AABBDD Modern bread wheat an allohexaploid T. monococcum T. searsii? T. turgidum Emmer wheat T. tauschii T. aestivum