广西石灰岩地区蜈蚣蕨居群的遗传多样性研究  

Analysis of genetic diversity on Pteris vittata L. populations from Guangxi limestone area

作　　者：周厚高[1] 谢义林[2] 黎桦[2] 周琼[2] 张西丽[2] 王中仁[3] 周世良[3] 

机构地区：[1]仲恺农业技术学院,广东广州510225 [2]广西大学农学院,广西南宁530005 [3]中国科学院植物研究所,北京100093

出　　处：《广西植物》2002年第1期67-70,共4页Guihaia

基　　金：国家自然科学基金资助项目 (编号 :3976 0 0 10 )

摘　　要：采用等位酶分析方法 ,研究了广西石灰岩地区蜈蚣蕨居群的遗传多样性 ,分析了其空间变化趋势。检测了 8个酶系统 ,1 5个酶位点。分析结果表明 :广西石灰岩地区蜈蚣蕨居群遗传多样性程度较高 ,每个位点的等位基因平均数为 1 .6 7,多态位点为 5 7.78% ,平均期望杂合度为 0 .2 4 9。蜈蚣蕨居群的遗传组成在居群间有一定的差异 。Population genetic diversity and allele spatial distribution of Pteris vitatta from Guangxi limestone area were studied by allozyme electrophoresis. Eight enzyme systems and 15 loci were screened. The results showed that the genetic diversity of Pteris vitatta populations from Guangxi limestone area was high,the mean number of alleles per locus was 1.67,polymorphic loci was 57.78%,the mean expected heterozygosity was 0.249. There were difference in genetic variation among populations and no correlation between difference and spatial distance.

关 键 词：广西 石灰岩地区 蜈蚣蕨 居群 遗传多样性 等位酶分析 

分 类 号：Q949.36[生物学—植物学]