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文章分析了 12个日本落叶松家系扦插苗造林后的高生长表现、遗传参数和稳定性参数。得出 :在经过一次选择后 ,优良家系 (超过日本落叶松丰产林标准 15 % )只占全部家系的 1/3 ,并且仍有少量的家系低于此标准 ,可能的原因是基因型×环境 (年份 )互作的敏感性 ;连续测定期间 ,树高总生长量的广义遗传力变化不大 (74 5%～78.0 % ) ,说明高生长受中上等遗传效应的控制 ;但遗传变异系数和表型变异系数均随年龄增长而下降 ,显然再行选择需加大选择强度 ;然而 ,变异系数下降有利于为生产提供品质均一的无性系材料。稳定性分析表明 ,家系×年龄的互作是明显的 ,即高生长性状是对环境敏感的性状 ;多数家系能够利用模型进行回归预测 ;如欲在树木发育的幼龄期进行选择 ,当缺少多点试验数据时 ,只能通过连续测定 ,对稳定性好的家系作出可靠评价。文中还对稳定性方法在早期测定中的作用进行了探讨。
The paper analyzed the high growth performance, genetic parameters and stability parameters of 12 Japanese larch family cuttings after afforestation. It is concluded that after one selection, the fine families (over 15% of the Japanese larch high-yield forest standard) account for only 1/3 of the total pedigrees and there are still a few families below this standard. The possible reasons are genotype × environment (Year), the general heritability of the total tree height increment did not change much (74.5% -78.0%) during the continuous measurement period, indicating that the high growth was controlled by the upper-middle genetic effect, but the genetic variation coefficient And phenotypic coefficient of variation decreased with age, it is clear that the choice of choice to increase the choice of intensity; however, the decline in coefficient of variation is conducive to the production of uniform quality clonal material. Stability analysis shows that the interaction between family × age is obvious, that is, the high growth traits are environmentally sensitive traits; most of the families can use the model to predict the regression; if you want to choose in the young tree development, when the lack of more Point test data, only through continuous determination of the stability of the family to make a reliable assessment. The article also discusses the role of stability in early detection.