<正>半同胞子代测定的研究于1972年开始,在1977年完成。从这些研究的结果看出,在45个家系之间苗期高生长量在1％平准上是非常显著的。 遗传型×环境互作(GEI)表现的经验值,可借助于互变量的分析来计算。家系×年分(7.39％)、家系×地点(7.36％)和家系×地点×年分(19.91％)的高的方差分量百分率,表现了杉木的GEI是十分显著的。 在杉木育种程序中,应用半同胞子代测验,检验GEI类型是完全可能的。 根据遗传稳定性研究的结果,该种子园内这些家系可分为四种类型:“速生—稳定型”、“中等—稳定”,“变化的”和慢生型”。

Our study on the half-sib progeny test started in 1972 and was completed in 1977-The results of this study show that the height growth in the nursery phase of the 45 families was very significant at the one percent level.The empirical value by manifested the genetype × environment interaction (GEI) can be detected by using covariance analysis. The high proportional Contribution of the variance components of family × year (7.39,%), family × site (7. 36%) and family × site × year (17. 91%) indicated that the GEI in Chinese fir was very significant.It is quitely advisable to explore GEI patterns by using half-sib progeny tests in the breeding program of Chinese fir.According to the results of the genetypic stability shown in this study, the families studied in the seed orchard can be divided into four classes, i. e, "fast growing stability", "medium stability", "variable" and "slow growing".