作　　者： ; ;

机构地区： 华南农业大学林学院

出　　处： 《华南农业大学学报》 1994年第3期129-135,共7页

摘　　要： 应用同工酶分析技术，分析了水杉原产地３个天然小群体的遗传结构。结果表明，水杉群体具有较高的分子变异水平，３个小群体的多态座位百分率达８３．３％±０．０７２２．等位基因平均数为２，９４±０．３８０２，平均期望杂合度为０．３８７３±０．００７９。小群体间的分化程度不高，３个小群体平均遗传距离为０．０８５７±０．０３１８；同工酶测定的总变异中，９１．４％的变异来自小群体内，仅８．６％的变异来自小群体间。 Po pulation genetic structure in three separate clusters of Metasequoiaglyp to stro boides from their o riginal distributio n range was studied by iso zyme analy-sis based on p olyacrylamide gel electro pho resis. The results were as follo ws : The lev-el of genetic variability in the population of Metasequo ia glyptostrobo ides was rela-tively high. The percentage of polymorphic loci(P),average number of alleles per loci(A)and average expected heterozygosity(He)were 83.3% ± 0.0722,2.9375 ± 0.3802and 0。3 873 ± 0.0079, respectively. Similar to reports for other conifers, thedifferentiation level among c1usterS of Metasequoia glyptostroboides was relativelylow. The average genetic distance(D)among the three clusters was 0.0857 ± 0,03 1 8.Only 8.6% of the allozyme variability was attributed to the mutation among the clus-ters while the remaining 9 1.4 % resided within their respective clusters.

关 键 词： 水杉 同功酶 群体遗传结构

领　　域： [农业科学] [农业科学]