落叶松40个半同胞家系的年龄-年龄相关性及生长性状早期选择
收藏国家林业和草原科学数据中心2022-11-02 更新2024-03-06 收录
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Larix principis-rupprechtii Mayr is a dominant species in coniferous forests of North China. However, early selection of L. principis-rupprechtii for growth traits is poorly characterised. To explore the optimal selection age for this species, heights (HT) and diameters at breast (DBH) of 40 half-sib families were measured at ages 3, 12, 22, and 28 years in a progeny test population established in the town of Kangjiahui, Shanxi Province. Age trends in heritability, age–age genetic correlations, and early selection efficiency for height and DBH were analysed. The individual heritability of these growth traits varied over time, and maximized at different ages (0.55 at age 12 for HT and 0.48 at age 28 for DBH). The age–age genetic correlations were always positive, and the majority were high (0.790–0.953) between the juvenile and mature ages for HT and DBH.
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国家林业和草原科学数据中心
创建时间：
2022-11-02
