西北林学院学报2012，Vol.27Issue(6)：78-82,5.DOI:10.3969/j.issn.1001-7461.2012.06.16
小兴安岭南部幼龄期杂种落叶松生长变异与优良家系的选择
Genetic Variations in Growth Traits of Juvenile Stage Hybrid Larch in Southern Xiaoxing'an Mountains and Selection of Superior Families
摘要
Abstract
Genetic variations, variance analysis, and correlation analysis were carried out on the growth traits (including tree height, diameter at breast height) of larch hybrids in an experimental forest in southern Xiaoxing'an Mountain, China. The results showed wide ranges of tree height variation were observed among 7-, 5- and 3-year-old larch hybrid families with variation coefficients of 20. 90%, 26. 40% and 26. 96%, respectively. With the increase of tree age, the overall variations of height and DBH gradually decreased. Very significant and positive correlations were found among the tree height and DBH with different ages, and between the tree height and width. The Pearson correlation coefficients of height between 3-year-old and 5-, 7-year-old trees were 0. 713 and 0. 578, respectively. The larch hybrid families haa a stable performance in the juvenile stage. A preliminary selection could be carried out among the trees with 7 years old. L. gmelinii X L . kaempferi and L. kaempferi X L. gmelinii had the outstanding performance. Their tree height (and DBH) were 10. 0% (22. 9%) and 5. 2% (18. 1%) respectively higher than Wuyiling (Larix gmelinii) provenance. Five larch hybrid families were selected as the superior ones. The heritability of height and DBH were 0. 652 and 0. 606. The genetic gains of them were 7. 83% and 12. 53%. The average height and DBH of 5 superior families were 9. 97% and 26. 20% higher than those of Wuyiling provenance.关键词
杂种落叶松/生长性状/遗传变异/相关分析/家系选择Key words
larch hybrid/ growth traits/ genetic variation/ correlation analysis/ family selection分类
农业科技引用本文复制引用
韩家永,张含国,贾庆彬,张振,徐悦丽..小兴安岭南部幼龄期杂种落叶松生长变异与优良家系的选择[J].西北林学院学报,2012,27(6):78-82,5.基金项目
国家科技支撑计划(2012BAD01B01) （2012BAD01B01）
黑龙江省科技攻关计划(GA08B201-01). （GA08B201-01）
