摘要
应用同工酶分析方法，测定北京市东灵山区两个分别代表干旱和湿润生境的辽东栋（ＱｕｅｒｃｕｓｌｉａｏｔｕｎｇｅｎｓｉｓＫｏｉｚ．）群体的遗传结构。共分析统计了１３ 个酶系统３０ 个位点。结果表明：辽东栎群体内部存在丰富的遗传变异（多态位点百分率为８６．６％ ，等位基因平均数为２．２５）。两群体遗传结构的相似性程度很高（Ｄ＝ ０．０２９， ＧＳＴ＝ ０．０４８）；但在个别位点上仍存在较大差异，这些差异的产生可能与对小生境的适应有关。对不同年龄段的初步分析结果显示。
The genetic structure of two Liaodong oak (Quercus liaotungensis Koiz.) populations whose habitats represent respectively moist and dry conditions at Dongling Mountain region, a suburb of Beijing City, was studied by using isozyme analysis. Thirty putative loci from thirteen enzyme systems were analyzed. The result showed very high genetic variability in the two populations, with a percentage of polymorphic loci of 86 6%, and an average number of alleles per locus of 2 25. There still existed obvious differences in a few loci although high levels of genetic similarity was observed, indicated by low value of both distance (D=0 029) and coefficient of gene differentiation (G ST =0 048). The dynamic changes of the gene frequencies of different age groups of oak trees may imply that the oak populations can be adaptive to different conditions.
基金
中国科学院八五重大资助项目
关键词
栎
辽东栎
群体遗传结构
水分状况
干旱
湿润
Quercus liaotungensis
Isozyme
Genetic structure
Water condition
Adaptation
