栓皮栎天然群体过氧化物酶同工酶遗传变异分析

Variation of Peroxidase Isozyme on Natural Populations of Quercus variabilis

对秦岭北坡中段、巴山北坡、秦岭东段的栓皮栎3个天然群体的过氧化物酶同工酶进行了研究。结果表明,栓皮栎天然群体过氧化物酶同工酶由POD A、POD B、POD C3个多态位点组成。各群体的多态位点百分率为100%,等位基因平均数为2.300,平均期望杂合度为0.651。表明栓皮栎天然群体在过氧化物同工酶酶系统各基因位点上具有较高的遗传变异水平,其遗传变异性大多发生于群体内,群体内变异占总变异的95.3%,群体间变异占总变异的4.7%。

Studies were accomplished on the genetic structure of three natural populations of Quercus variabilis with peroxidase isozyme. The results showed that the peroxidase isozyme of Q. variabilis consisted of three polymorphic loci: PODA, PODB and PODC. The percentage of polymorphic loci of every population was 100%. The mean of alleles was 2.300 and the expected heterozygosity was 0.651. Results also showed that higher variation on genetic locus of peroxidase isozyme existed in populations of Q. variabilis. Genetic variations mostly arose within the population. The innerpopulation genetic variations account for 95.3% of the total genetic variations and the interpopulation genetic variations account for 4.7%.