17个红锥种源生长、干形及木材基本密度变异分析

Analysis of Variation on Growth,Stem Traits and Wood Basic Density of 17 Castanopsis hystix Provenances

对全国红锥主要分布区17个种源的生长性状、干形性状及木材基本密度进行了测定,分析了不同产地红锥生长及干材的遗传变异情况。树高、胸径、单株材积、高径比、通直度、尖削度、枝下高、树皮厚度及木材基本密度在不同种源间均存在显著差异,而明显度和圆满度在种源间的差异不显著。性状变异系数幅度在3.0%～41.9%之间。依据多性状选择指数,初步筛选出41、33、15、32和11号这5个综合表现优良的种源。

The growth indexes, stem traits, wood basic density of 17 provenance resources of Castanopsis hystixin the major distribution region of China were determined, and the genetic variation of C. hystix from different producing areas was analyzed. The results showed that there were significant differences among 17 provenances of C. hystix in tree height, DBH, tree volume, height under branch, H/DBH, straightness of height, stem＇s taper- ness, height under branch, bark thickness and wood basic density. Main characters variation coefficients among different provenances varied from 3.0% to 41.9%. By the muti-characteristic selection method, the No. 41, 33, 15, 32 and 11 provenances were preliminarily considered superior provenances.