%A 刘登才,颜济,杨俊良 %T 节节麦5D染色体上随体多态性的一个证据 %0 Journal Article %D 1997 %J 遗传 %R %P 5-7 %V 19 %N 4 %U {http://www.chinagene.cn/CN/abstract/article_4655.shtml} %8 1997-08-10 %X 5D染色体是节节麦整个染色体组中唯一的1对随体染色体, 其随体位于5D短臂的末端。对来源于中国的9个不同的节节麦居群的吉姆萨C带分析表明: 同一份节节麦居群内不同植株或不同细胞,这个端部随体在整个有丝分裂前期、中期和间期都很稳定,表现为大小、强弱一致的端部特征带。但是不同节节麦居群间5D染色体上的这个随体C带存在多态性。5D染色体上的随体区域可以作为小麦遗传分析和遗传操作的标记性状。同时本文还对这种多态性与普通小麦 5D染色体短臂上随体的消失的关系作了分析。
Abstract:C-banding analysis of satellites in 9 accessions of Ae.tauschii native to China was carried out with C-banded miotic interphases,prophases and metaphases,The results showed that the c-banded heterochromatin of satellites of Ae.tauschii did not change in size during the whole miotic stage and novariaton was observed among plants and cells within a accession,while polymorphism in c-banded satellites between different accessions was found.The C-banded heterochromatin of satellites of Ae.tauschii can be used as a marker in genetic research and genetic research and genetic manipulation.Further discussion is made on the relation between the polymorphism and the satellie loss in common wheat.