樟树种源/家系苗期性状变异分析

为了解樟树遗传变异的来源和规律，进行了樟树苗期种源／家系两水平试验研究。结果表明，樟树的遗传变异存在于种源和家系两个层次。樟树苗高、枝下高、冻害性状在种源层次的变异远大于家系层次的变异，地径则相反。方差分析表明，樟树苗期种源间在苗高、地径、枝下高、冻害性状上有极显著差异；家系之间在苗高、地径、冻害性状上有极显著差异，在枝下高性状上无显著差异，种源内大多数家系间各性状的差异达不到显著水平。苗高、枝下高、冻害各性状值，高于富阳种源（Ｃｋ）的家系分别有１２５、９５、８８、１０８个，低于富阳种源（Ｃｋ）的分别有５６、８６、９３、７３个。苗高与种源纬度显著负相关，与年均温、１月均温、绝对低温显著相关；冻害与纬度极显著负相关，与年均温、１月均温、绝对低温显著相关；枝下高与纬度显著相关，与年均温、１月均温、绝对低温显著负相关；苗高与冻害极显著相关，与地径显著相关。

The Analysis on Genetic Variance for Provenance/Families Test at Seedling Stage of Cinnamomum camphora in Northern Zhejiang Province

The research on provenance/family test of Cinnamomum camphora is carried out at seedling stage in order to learn the source and law of genetic variation of camphor tree. The result shows that there is genetic variation on provenance level and family level. The genetic variation of seedling height,branching heiht,freeze injury value is much greater on provenance level than that on family level,and the contrary for ground diameter trait on family level. The variance analysis shows there is extreme significant difference in seedling height,ground diameter,branching height,freeze injury value among provenances;there is significant difference in seedling height,ground diameter and freeze injury value and no significant difference in branching height among families,and there is no significant difference for many traits among families within provenance. There are 128,95,88,108 families with higher value and 56,86,93,73 families with lower value compared to Fuyang provenance in seedling height,ground diameter, branching height,freeze injury. Seedling height has significant negative relationship with latitude and significant relationship with annual mean temperature,Jan. mean temperature and extreme lowest temperature; freeze injury value has extreme significant negative relationship with latitude and significant relationship with annual mean temperature,Jan. mean temperature and extreme lowest temperature;branching height has significant relationship with latitude and negative significant relationship with annual mean temperature,Jan. mean temperature and extreme lowest temperature.Seedling height has extreme significant relationship with freeze injury value and significant relationship with ground diameter.