中国板栗北方种群表型变异频率研究  

Researches on Characteristics Frequency of Northern Population in Castanea mollissima

作　　者：兰彦平[1] 周连第[1] 周家华[1] 姚砚武[1] 王尚德[1] 

机构地区：[1]北京市农林科学院农业综合发展研究所,北京100097

出　　处：《华北农学报》2007年第5期106-109,共4页Acta Agriculturae Boreali-Sinica

基　　金：北京市科技新星项目"乡土树种板栗的遗传多样性研究"(2005B32)

摘　　要：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。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.

关 键 词：板栗 表型变异 频率 

分 类 号：S664.2[农业科学—果树学]