摘要
以5年生36个杂种落叶松家系为材料,测定其树高、胸径生长性状,估算变异系数、遗传力和遗传增益,筛选出优良家系。结果表明:各家系的树高、胸径存在较丰富变异,树高变异系数小于胸径,树高、胸径极显著相关(P<0.01),家系间树高、胸径差异均达极显著差异水平(P<0.01)。以10%的入选率,初选出家系1317、1324、1318、和1327为优良家系,树高平均增益为15.98%,胸径平均增益为29.46%。
We taked 36 hybrid larch families(5-years-old) as the materials, measured their growth characteristics including height and DBH(diameter at breast height), estimated variation coefficient, heritability and genetic gain, and then selected excellent families. The results showed: there exists abundant variations, The tree height coefficient of variation was smaller than the DBH. There was highly significant correlation between height and DBH(P<0.01). The differences in tree height and DBH between families were extremely significant(P<0.01).With a 10% selection rate, the primary family 1317, 1324, 1318, and 1327 were excellent families, with an average tree height genetic gain of 15.98% and an average DBH genetic gain of 29.46%.
作者
石宝英
Shi Baoying(Baolongdian Seed Forestry Farm of Wuchang County,Harbin 150211,Heilongjiang,China)
出处
《林业科技情报》
2020年第1期11-13,18,共4页
Forestry Science and Technology Information
关键词
杂种落叶松
生长性状
遗传变异
家系选择
Hybrid larch
growth characteristics
genetic variation
families selection
