中南林业科技大学学报2025，Vol.45Issue(3)：20-27,8.DOI:10.14067/j.cnki.1673-923x.2025.03.003
38年生红松优树半同胞子代遗传变异与优良家系选择
Genetic variation and superior family selection of half-sib progeny of 38-year-old Pinus koraiensis
摘要
Abstract
[Objective]In order to observe the growth characteristics of half-sib progeny of superior trees of Pinus koraiensis,analyze the variation of growth of Pinus koraiensis families,and to provide reference for the selection of superior families.[Method]The 38-year-old half-sib progeny families of Pinus koraiensis trees at the same afforestation site were selected as the research objects.By observing and analyzing tree height,DBH and individual tree volume,the character variation characteristics of Pinus koraiensis families were analyzed,and the genetic parameters and breeding values were estimated to screen out the superior families.[Result]There were significant and extremely significant differences in the growth traits between families and between groups,and there was abundant variation in the growth traits between families.The phenotypic coefficient of variation of each trait ranged from 6.66%to 29.80%,and the genetic coefficient of variation ranged from 1.60%to 11.95%,and the two types of coefficient of variation were highest in the volume of single plant.The variation range of family heritability and single plant heritability was 0.29-0.46 and 0.07-0.34,respectively.The single plant volume had relatively high coefficient of genetic variation and was subject to high genetic control.The phenotypic positive correlation and genetic positive correlation were very significant among the growth traits of the families,and the phenotypic correlation coefficient of DBH and tree volume was the highest(0.98).The best linear unbiased estimation(BLUP)method was used to order the breeding values,and 22 superior families were selected.The average tree height,DBH and tree volume were 11.15 m,23.74 cm and 0.273 5 m3,respectively,and the average tree height,DBH and tree volume were 11.15 m,23.74 cm and 0.273 5 m3,respectively.They were 6.39%,19.54%and 42.30%higher than the population mean,respectively.The average practical and genetic gain of the selected families reached 42.28%and 14.80%.[Conclusion]There are abundant variations in the growth traits of Pinus koraiensis families.The superior families selected through comprehensive analysis and evaluation can provide theoretical and material basis for the breeding of improved red pine varieties(verification),the upgrading of seed orchard and the promotion of afforestation,and greatly promote the process of improved Pinus koraiensis varieties.关键词
红松/半同胞子代/遗传变异/家系选择/育种值Key words
Pinus koraiensis/half-sib progeny/genetic variation/family selection/breeding value分类
农业科技引用本文复制引用
尚福强,马晓雨,高源,李连强,张利民,张丽艳,马志强,冯健..38年生红松优树半同胞子代遗传变异与优良家系选择[J].中南林业科技大学学报,2025,45(3):20-27,8.基金项目
辽宁省重点研发计划项目(2020JH2/10200020) （2020JH2/10200020）
辽宁省森林经营研究所基本科研项目(2023JH0211). （2023JH0211）
