30年生红松优良家系选择

Selection of Excellent Families of 30-year-old Pinus koraiensis Sieb.et Zucc.

以黑龙江省苇河林业局青山种子园的27个红松优树自由授粉子代为对象,测定其30a生时的生长性状。结果表明,树高、胸径和材积的平均变异系数分别为9.22%、17.75%和38%。生长性状遗传力受弱至中度遗传控制。以材积做选择目标,入选率为10%时,选出3个优良家树高、胸径、材积的遗传增益分别为11.30%、21.76%和56.32%。

The free-pollinating progeny of 27 Pinus koraiensis Sieb.et Zucc.trees in Qingshan Seed Orchard of Weihe Forestry Bureau of Heilongjiang Province were taken as the object,and the growth characters of the 30-year-old trees were determined.The results showed that the average coefficients of variation of tree height,DBH and volume were 9.22%,17.75% and 38% respectively.Growth trait heritability is under weak to moderate genetic control.Taking volume as the selection target,when the selection rate was 10%,three excellent families were selected.The genetic gains of tree height,DBH and volume were 11.30%,21.76% and 56.32% respectively.