1. Of variation of the individual tree volume. Superior family selection for pulpwood purpose The genetic progress of the equal emphasis weights and restricted index, Ⅰ=, which were comprised of DBH, height, basic density, fibre length and holo-celouse, and growth emphasis restricted index, , was the highest and the expected genetic progress for each individual trait in both indices was reasonable.
纸浆材优良家系选择和育种程序由胸径、树高、基本密度、纤维长度和综纤维素含量5个性状构成的等权重约束选择指数方程I=0.2751X+0.5215X-4.2408X+1.7437X+10.9114X及以生长为主的约束指数方程I=2.6420X+3.7782X-42.9166X+14.1762X-15.8136X的指数遗传进展最高,且各性状的期望遗传进展也比较合理。