八倍体节节麦-燕麦部分双二倍体的细胞遗传学鉴定  

MOLECULAR CYTOGENETICAL STUDIES ON AEGILOPS TAUSCHII (coss.) SCH AVENA FATUAL PARTIAL AMPHIDIPLOID

作　　者：李浩兵[1] 姚景侠[1] 

机构地区：[1]江苏省农科院遗传生理研究所

出　　处：《江苏农学院学报》1998年第3期1-5,共5页Jiangsu Agricultural Research

基　　金：国家自然科学基金;江苏省重点攻关项目;江苏省应用基础资助

摘　　要：通过对节节麦、野燕麦、八倍体节节麦－燕麦部分双二倍体的Ｃ分带的研究，表明八倍体节节麦－燕麦部分双二倍体中含有小麦的Ｂ组和Ａ组染色体。通过对节节麦、野燕麦、八倍体节节麦－燕麦部分双二倍体与中国春小麦回交后代的花粉母细胞减数分裂过程中染色体配对行为的研究，表明回交一代中含有１４个左右的二价体，而不是预期的７个二价体；通过对八倍体节节麦－燕麦部分双二倍体与中国春小麦回交后代花粉母细胞中染色体的原位杂交研究，表明八倍体节节麦－燕麦部分双二倍体中含有１４条左右的燕麦染色体。因此，认为八倍体节节麦－燕麦部分双二倍体不是真正的节节麦与野燕麦的杂种，而可能是某一四倍体小麦与燕麦的杂交后代。Studies on C banding of chromosomes of Aegilops tauschii (coss.)Sch., Avena fatual and Aegilops tauschii (coss.) sch Avena fatual partial amphidiploid indicated that there were chromosomes of A genome and B genome of wheat in octoploid hybrid. Studies on meiotic synapsis of pollen mother cells of BC 1 between partial amphidiploid and China spring wheat indicated that there were 14 or so bivalent but expected 7 bivalent. Studies on in situ hybridization of pollen mother cells of BC 1 between partial amphidiplord and China spring wheat indicated that there were 14 or so chromosomes of Avena fatual in it. So it was believed that partial amphidiploid was not real hybrid between Aegilops tauschii (coss.)sch. and Avena fatual, it might be hybrid between a certain tetraploid wheat and Avena fatual.

关 键 词：节节麦 野燕麦 八倍体杂种 染色体原位杂交 

分 类 号：S512.032[农业科学—作物学]