遗传 ›› 1997, Vol. 19 ›› Issue (4): 5-7.

• 论文 • 上一篇    下一篇

节节麦5D染色体上随体多态性的一个证据

刘登才; 颜济; 杨俊良 LIU Deng-Cai;YAN Ji;YANG Jun-Liang   

  1. 四川农业大学小麦研究所, 都江堰 611830 Triticeae Research Institute,Sichuan Agricultural University,Dujiangyan City 611830
  • 收稿日期:1900-01-01 出版日期:1997-08-10 发布日期:1997-08-10

An Evidence of Satellite Polymorphism in Chromosome 5D of Aegilops tauschii Cosson

  • Received:1900-01-01 Online:1997-08-10 Published:1997-08-10

摘要: 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.

关键词: 节节麦, 随体, C带多态性, Aegilops tauschii, 有丝分裂周期 Keyr words, SCE, 乙醛磺酸, NOR活性, 胚胎发育

Key words: Sister chromatid exehange, Embryo development, Sulfonic aldehyde, NOR activity