南京林业大学学报（自然科学版）2024，Vol.48Issue(5)：81-89,9.
长白落叶松自由授粉家系生长变异及优良家系早期选择
Growth variation and superior families early selection of Larix olgensis free-pollinated families
摘要
Abstract
[Objective]We investigated genetic variation and stability in growth characteristics across 40 free-pollinated families from four Larix olgensis seed orchards located in different regions,aiming to identify superior families.[Method]We analyzed progenies from four L.olgensis locations namely Hegang,Linkou,Yongji and Dagujia.The study involved single-point analysis of variance(ANOVA),multi-point multi-year ANOVA,genetic parameter analysis,stability analysis,and breeding value estimation on tree height and diameter at breast height(DBH)for trees aged 6-8 years to identify superior families.[Result]Single-point ANOVA results indicated significant differences in growth traits among families.Multi-point multi-year ANOVA revealed significant variations in the height of L.olgensis among families,locations,years,and their interactions.Genetic parameter analysis demonstrated that family heritability of height,ranging from 0.611 to 0.852 across sites,was greater than individual heritability,indicating strong genetic control.The phenotypic and genetic coefficients of variation at each site were 41.36%and 3.87%,respectively.Genetic gain in eight year height ranged from 23.35%to 38.89%at a 20%selection rate.Breeding value estimation identified high-yielding and stable families(CH309,CH349,HG5,BS349,and HG13)with an average breeding value of 0.528,an average height of 4.00 m(25.78%higher than that of the control),and an average stability parameter of 0.085,making them suitable for promotion in four locations.[Conclusion]L.olgensis exhibits rich genetic diversity in growth traits among families across different years and locations.The identified superior families are well-suited for cultivation in the three northeastern provinces and similar environments.关键词
长白落叶松/生长性状/遗传变异/稳定性分析/优良家系/早期选择Key words
Larix olgensis/growth trait/genetic variation/stability analysis/superior family/early selection分类
农业科技引用本文复制引用
王佳兴,闫平玉,孙佰飞,刘劲宏,冯可乐,张含国..长白落叶松自由授粉家系生长变异及优良家系早期选择[J].南京林业大学学报（自然科学版）,2024,48(5):81-89,9.基金项目
国家重点研发计划(2022YFD220030202,2022YFD2201002). （2022YFD220030202,2022YFD2201002）
