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为了解白檀在湖南地区不同环境的适应性及遗传变化程度,对湖南地区6个白檀天然居群的189个个体的11个表型性状进行形态遗传多样性分析。结果表明,11个表型性状均具有丰富的遗传多样性(H’=1.389),居群间的平均方差分量为52.60%,居群内的平均方差分量为37.03%,说明在白檀形态性状多样性分布上是居群间多样性程度大于居群内,即居群间的形态变异是白檀形态变异的主要来源。聚类分析结果表明,6个居群的表型性状并没有严格依地理距离聚类,主成分与相关分析结果显示在11个表型中树型因子是主要形态变异因子,年降雨量与树型因子呈显著正相关,其他表型变异受遗传的影响可能大于受环境的影响。
In order to understand the adaptability and genetic variation of Ditan in different environments in Hunan Province, morphological and genetic diversity of 11 phenotypic traits of 189 individuals in six natural populations of Pterocarpus naturalis in Hunan province were analyzed. The results showed that 11 phenotypic traits were rich in genetic diversity (H ’= 1.389), the average variance between the populations was 52.60%, the average variance component within the population was 37.03%, indicating that the morphological traits of white sandalwood Sexual distribution is the degree of inter-population diversity greater than the population, that is, the morphological variation among populations is the main source of morphological changes of sandalwood. The results of cluster analysis indicated that the phenotypic traits of the six populations were not clustered strictly according to geographical distances. The principal component analysis and correlation analysis showed that among the 11 phenotypes, the tree form factor was the major morphological variation factor. Type factor was significantly positive correlation, other phenotypic variation by genetic impact may be greater than the impact of the environment.