中国板栗北方种群表型变异频率研究

研究了中国板栗北方产区5个地理种群种子及叶片特征的表型分化、表型性状值(数量性状)的频率分布及表型频率多样性。结果表明,板栗种群间的方差分量占总变异的10.97%,种群内的占41.57%,7个性状种群间的表型分化系数变幅在11.85%~28.34%。板栗7个性状种群间的表型分化系数平均为24.26%,表明种群内变异是板栗表型变异的主要来源,种群内品种间的多样性大于种群间的多样性。板栗7个性状频率分布基本符合正态分布,但偏度和削度各自不同,众数的位置及所在组的频率也存在一定差异。表型多样度、Shannon信息指数均可用于表型多样性的评价。

Researches on Characteristics Frequency of Northern Population in Castanea mollissima

The overall levels of phenotypic characteristics of seed and leaf within and among 5 geographic populations were estimated. The results showed that the percentage of variance portion among population was 10.97% while that within population was 41.57%.The range of variation of differentiation coefficient of morphological traits among population was between 11.85% to 28.34%.The mean phenotypic differentiation coefficient(VST)showed that the variation within population(24.26%) was extremely higher than that among populations(75.74%) which revealed that variation within population were more important.Frequency distribution of 7 phenotypic characteristics in Castanea mollissima primarily displayed a normal distribution.Both multiplicity analysis and Shannon information index is suitable for evaluation of phenotypic diversity in Castanea mollissima.