黄山松生长早晚期相关与早期选择

由8年生黄山松种源试验林所作的分析知,历年树高遗传力稳定于0.62～0.76;各年树高间遗传相关系数均在0.82以上,显著高于相应的表型相关系数,表现出树高生长在时间上的遗传稳定。根据28年生人工林和45年生天然林解析木资料所估算的早晚期生长表型相关系数和早期选择的年遗传增益比率,初步确定8～10年生是黄山松最佳的早期选择年龄,此时选择所能得到的年遗传增益显著高于主伐期时选择的平均年增益。

Juvenile-Mature Correlation and Early Selection for Growth Traits of Taiwan Pine

This paper analysed the provenance heritability and correlati correlation coefficients of Taiwan pine in annual ,tree height according to the data from provenance test plantations at the age of 8, with provenance heritability varing from 0.62 to 0.76 and genetic correlation coefficients all being more than 0.82. The result showed that tree height increment had a genetic stability with time. The age, 8 to 10, was an optimum stage for the early selection of Taiwan pine stand with a significantly higher genetic gain than that gained in crop time according to the data of stem analysed sample from plantations (aged 28) and natural stands (aged over 45) of Taiwan pine, which was juvenile-mature phenotypic correlation coefficients and the rate of annual genetic gains on early selection.