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。
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 bc used as identification markers of sex chromosome in Ginkgo biloba. In addi-tion, the heterozygosity and polymorphism of NOR are discussed.
出处
《遗传》
CAS
CSCD
北大核心
1996年第3期3-5,共3页
Hereditas（Beijing)
关键词
银杏
雌株
性染色体
AGNOR
Ginkgo biloba, Female plant, Ag-NOR, Sex chromosome
