| 摘要: |
| 采用8种等位酶对白皮松4个天然群体的遗传多样性和遗传分化进行了研究。在4个群体中共检测到10个基因位点，15个等位基因，其中6个位点为多态位点; 群体总体水平多态位点比率P =60%, 平均有效基因数A =1.92, 平均期望杂合度He =0.106，种群平均遗传距离为0.0068。南漳白皮松群落平均等位基因数A=1.9，平均有效等位基因数 Ae=1.08，多态位点百分率P=60.0％，期望杂合度He=0.092，观测杂合度Ho=0.098。南漳白皮松群体遗传多样性偏低，遗传变异水平较低，适宜采取原地保护和异地保存相结合的保护策略。白皮松4个群体的遗传分化系数Fst =0.0057, 基因流Nm =43.9773, 表明白皮松群体间有一定程度的遗传分化。聚类分析表明, 4个群体分为 3组，南漳群体与山西孝义群体的遗传距离最小，亲缘关系最近。 |
| 关键词: 白皮松 等位酶 遗传多样性 保护策略 |
| DOI： |
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| 基金项目:国家科技支撑计划（项目编号：2006BAD13B07-08） |
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| Allozyme analysis of genetic diversity of Natural Populations of Pinus bungeanaPinus bungeana |
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Ding Xiao-Fei
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| Abstract: |
| Genetic diversity and genetic differentiation among four natural populations of Pinus bungeana were studied using eight allozyme systems.The results showed that 10 loci and 15 alleles were detected, of which 6 loci were exhibited polymorphism. Percentage of polymorphic loci P=60%, mean number of effective alleles per locus A=1.92, mean expected heterozygosity He=0.106，mean genetic distance were 0.0068. The parameters of genetic diversity of P. bungeana of Nanzhang was given as follows：mean number of alleles per locus A=1.9,mean number of effective alleles per locus Ae=1.08, percentage of polymorphic loci P=60.0%, expected heterozygosity He=0.092, directly counted heterozygosity Ho=0.098. The genetic diversity in natural population of Nanzhang P．bungeana was slight low，and its implication for conservation strategy was discussed．Genetic diversity between populations Fst =0.0057, Gene flow Nm=43.9773, Pinus bungeana populations that have a certain degree of genetic differentiation. Four populations were divided into three groups according to Nei’s genetic distance，Genetic distance is minimum between Nanzhang population and Shanxi population，the relationship is recent． |
| Key words: Pinus bungeana allozyme genetic diversity conservation strategy |
