遗传 ›› 1996, Vol. 18 ›› Issue (3): 3-5.

• 论文 • 上一篇    下一篇

银杏雌株染色体Ag-NOR的研究

何梅; 李懋学 HE Mei;LI Mao-Xue   

  1. 北京大学生命科学学院,北京 100871 College of Life Sciences,Peking University,Beijing 100871
  • 收稿日期:1900-01-01 出版日期:1996-06-10 发布日期:1996-06-10

Study in Female Plant Chromosome Ag-NOR of Ginkgo biloba

  • Received:1900-01-01 Online:1996-06-10 Published:1996-06-10

摘要: 本文以银杏雌株的幼小胚珠为材料,对其体细胞染色体进行了Ag-NOR染色研究。发现其Ag-NOR(随体)的数目均为4个,大小则有同形和异形两种类型。认为NOR(随体)的数目和形态不能作为性染色体的识别特征,并对NOR的杂合性和多态性进行了讨论。
Abstract:In this paper,the Ag-NOR of somatic chromosomes of young ovulum in Ginkgo biloba was studied.It was found that the number of Ag-NORs(satellite)were four constantly,though there were two kinds in size,homoeotype and heterotype.So we considered that the number and morphology of NOR(satellite)can not be used as identification markers of sex chromosome in Ginkgo biloba.In addition,the heterozygosity and polymorphism of NOR are discussed.

关键词: 银杏, 雌株, 银染核仁组成区, 性染色体
Key words,
Ginkgo biloba, HUMTH01基因座, 短串联重复序列, 群体遗传学, 遗传距离, 系统树聚合酶链式反应

Key words: Population genetics HUMTH01 Short tandem repeats Polymerase chain reaction Genetic distance Phylogentic tree