【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 ,但差异的程度并不与空间距离成正比更多还原

【Abstract】 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.更多还原