基于种质资源库自由授粉子代的杉木第3代种质生长评价及选择

Growth evaluation and election based on open-pollinated progenies of 3rd generation germplasm resources bank of Chinese Fir

对14年生杉木第3代种质资源的生长性状进行评价,并选择速生种质。结果表明:林分14年生时平均树高、胸径、单株立木材积分别为13.03m、16.9cm、0.16644m^3,生长性状受到中度偏下的遗传控制,树高、胸径、单株立木材积的遗传变异系数分别为2.87%、4.22%、10.58%,狭义遗传力分别为0.2041、0.2156、0.2309。根据单株立木材积育种值从参试的97个家系中选择出8个速生优良家系,14年生时平均单株立木材积为0.21280m^3,遗传增益为21.17%。

The growth evaluation of the 3rd germplasm resources of Chinese Fir was carried out based on an 14-year-old open-pollinated progeny test of the 3rd germplasm resources of Chinese Fir for 14 years.The results showed that the tree height,DBH and volume at the age of 14 years of the stand were 13.03m,16.9cm and 0.16644m^3,respectively.Furthermore,the genetic variation coefficient of tree height,DBH and volume was 2.87%,4.22%and 10.58%,respectively.Moreover,the narrow sense heritability of these traits was 0.2041,0.2156 and 0.2309,respectively.Eight families with average volume of 0.21280m^3 were identified as plus families,getting 21.17%genetic gain on volume.