吉泰盆地古樟群体遗传多样性分析

通过对来自吉泰盆地9个县市的148株古樟种子性状和苗期性状进行观测，研究各性状间的遗传变异程度和相关性，并进行方差分析、主成分分析、相关性分析和聚类分析。结果表明：古樟群体间种子大小、千粒质量、苗高和地径均具有丰富的形态多样性，各性状的平均遗传多样性指数较高，为3.34；各表型性状的差异主要来自于种源间，表明种源是香樟各性状的决定因素；种子大小和千粒质量主要决定了幼苗的高度；第1主成分反映了4个数量性状的全部信息，贡献率达到76.88%，且种子大小在一定程度上决定了后期植株苗期的生长量；9个群体可分为5个类群，各类群间性状差异明显，吉安市群体明显好于其他群体，并且种子大小和千粒质量性状与群体在吉泰盆地中的地理位置具有显著相关性。

Genetic Diversity of Cinnamomum camphora over 100 Years Populations in Jitai Basin

The seed and seedling traits of 148 Cinnamomum camphora over 100 years from the Jitai Basin were conducted. The degree and correlation of genetic variation among traits were studied, and variance analysis, principal component analysis, correlation analysis and cluster analysis were performed. The results showed that C.camphora had extensive genetic variation types, and the average of genetic diversity index of all traits was high for 3.34. The differences in phenotypic traits were mainly derived from the provenance, which indicated that the provenance was the determining factor of camphor morphologic traits. The size and the weight of seed significantly correlated with the seedling height. The first principal component reflects the total information of 4 quantitative traits, and the contribution rate reaches 76.88%, and the seed size determines the growth of the plant seedling to some extent. Nine populations could be classified into 5 groups. Each group had different characteristics and showed abundant genetic diversity. The group from Ji′an city was much better than the other groups. The size and the weight of seed had direct relationship with the origins of camphor trees.