红椿半同胞家系生长性状遗传分析

Genetic analysis of the growth traits of half-sib families of Toona ciliata

以8年生20个红椿半同胞家系测定试验林为研究对象,测定了20个红椿半同胞家系的树高、胸径、枝下高、冠幅等生长性状,并进行了遗传分析。红椿家系间的树高生长存在极显著差异,胸径生长存在显著差异。树高家系遗传力是0.231 9,单株遗传力是0.122 1,变异系数为4.7%。8年生20个红椿半同胞家系胸径家系遗传力是0.530 2,单株遗传力是0.264 6,遗传变异系数为12.9%,且胸径的遗传力高于树高。本次测定选出TC12,TC20,TC02,TC04,TC15等5个优良家系。

The growth traits of the tree height,diameter,height and canopy of Toona ciliate were measured and genetic analysis was carried out.There were significant differences in the growth of tree height of Toona ciliate,and there were significant differences in the growth of breast diameter.The family heritability of the high was 0.231 9,the single plant heritability was 0.122 1,and the genetic variation coefficient was 4.7%.The family heritability of the diameter at breast height was 0.530 2,the single plant heritability was 0.264 6,the genetic variation coefficient was 12.9%,and the heritability of the diameter was higher than that of the tree high.TC12,TC20,TC02,TC04,TC15 were selected which were good families.