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白皮松天然群体遗传多样性的等位酶分析
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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 | ||
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基金项目:国家科技支撑计划(项目编号:2006BAD13B07-08) | ||
Allozyme analysis of 美高梅 diversity of Natural Populations of Pinus bungeanaPinus bungeana | ||
Abstract: | ||
Genetic diversity and 美高梅 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 美高梅 distance were 0.0068. The parameters of 美高梅 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 美高梅 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 美高梅 differentiation. Four populations were divided into three groups according to Nei’s 美高梅 distance,Genetic distance is minimum between Nanzhang population and Shanxi population,the relationship is recent. | ||
Key words: Pinus bungeana;allozyme;美高梅 diversity;conservation strategy |