香樟16个优良半同胞家系子代苗期性状遗传测定

Genetic and Variation Analysis on Seedling Growth Characteristics of Sixteen Half-sibfamilies of Cinnamomum camphora

以香樟16个半同胞家系子代为研究对象,在四川省大邑县进行苗期试验,测定1 a龄苗期苗高、地径、冠幅3个性状。采用方差分析、遗传力估算、相关分析等方法对测定数据进行统计分析。结果表明:香樟家系间苗高、地径达到极显著差异,表明香樟半同胞家系苗期存在较为丰富的变异,进行苗期选择潜力较大;苗高、地径遗传力较高,属强度遗传;苗高、地径、冠幅三个性状之间呈显著正相关,尤以苗高与地径相关密切;以苗高、地径2个主要苗期生长性状,初步筛选4个苗期生长较快的家系。

The Seedling cultivation of the open pollinated seeds of 16 Cinnamomum camphora families was done with the complete random block design. The datums of height, ground diameter and crown width of annual seedlings were analyzed by use of variance analysis, heritability evaluation and correlation analy- sis. The results showed that the differences in height and diameter were significant among families. It indi- cated that the improvement potential was notable. According to the results of correlation analysis, signifi- cant positive correlations were found between the seedling height and the seedling ground diameter. The heritability of height and diameter was higher, displaying a strong additive genetic degree. The characters of seedling height and seedling ground diameter could be tion. Four fast-growing families were selected for further regarded as the most important indexes for selec- assessment.