马尾松半同胞家系多年度测定与早期选择

Analyses on growth of multi years and early selection of half sib family of Pinus masoniana

利用15年生的马尾松种子园自由授粉子代测定林多年份生长性状的观测数据,分析多年份家系间变异、家系表型、遗传相关、遗传力的变化趋势。结果表明,马尾松半同胞家系之间生长存在极显著差异,并主要由遗传所控制。马尾松家系选择从8年生开始是可行的,胸径生长是早期选择较好指标,并讨论了早期选择应用问题。

The time trend of genetic variations,amount of family growth,genetic correlations,as well as heritabilities were analyzed by using multi-year growth data of open pollinated progeny of masson pine.The results showed that there were extremely significant difference among families,which was mainly controled by genetic factor.The optimal early selection age of masson pine was 8 years old,the superior parameter for evaluation is growth of diameter at breast height（DBH）.The application of early selection was also discussed.