南京林业大学学报(自然科学版) ›› 2024, Vol. 48 ›› Issue (5): 81-89.doi: 10.12302/j.issn.1000-2006.202303014

• 研究论文 • 上一篇    下一篇

长白落叶松自由授粉家系生长变异及优良家系早期选择

王佳兴(), 闫平玉, 孙佰飞, 刘劲宏, 冯可乐, 张含国*()   

  1. 东北林业大学,林木遗传育种全国重点实验室,黑龙江 哈尔滨 150040
  • 收稿日期:2023-03-12 修回日期:2023-04-16 出版日期:2024-09-30 发布日期:2024-10-03
  • 通讯作者: * 张含国(hanguozhang1@sina.com),教授。
  • 作者简介:

    王佳兴(wjx0707@yeah.net),博士生。

  • 基金资助:
    国家重点研发计划(2022YFD220030202);国家重点研发计划(2022YFD2201002)

Growth variation and superior families early selection of Larix olgensis free-pollinated families

WANG Jiaxing(), YAN Pingyu, SUN Baifei, LIU Jinhong, FENG Kele, ZHANG Hanguo*()   

  1. State Key Laboratory of Tree Genetics and Breeding, Northeast Forestry University, Harbin 150040, China
  • Received:2023-03-12 Revised:2023-04-16 Online:2024-09-30 Published:2024-10-03

摘要:

【目的】通过对4个长白落叶松种子园的40个自由授粉家系在4个地点建立子代测定林,对其生长性状进行遗传变异和稳定性分析,初步选出长白落叶松优良家系。【方法】对来自鹤岗、林口、永吉、大孤家4个地点的长白落叶松家系6~8年生子代林树高、胸径进行单点方差分析、多年多点联合方差分析、遗传参数分析、稳定性分析及育种值估算,进行长白落叶松优良家系早期选择。【结果】单点方差分析表明,长白落叶松家系生长性状在家系间差异极显著;多年多点联合方差分析表明,长白落叶松家系树高性状在家系、地点、年份及互作间均差异极显著;遗传参数分析发现,不同地点不同年度树高家系遗传力均大于单株遗传力,各地点家系遗传力为0.611~0.852,4个地点联合家系遗传力为0.646,受到较强遗传控制。4个地点联合家系表型变异系数和遗传变异系数分别为41.36%和3.87%。20%入选率时8年生各地点树高性状遗传增益为23.35%~38.89%。以育种值估算结果为主,结合树高平均值和稳定性参数,选出CH309、CH349、HG5、BS349和HG13为高产稳产家系,平均育种值为0.528,平均树高为4.00 m,高出对照25.78%,平均稳定性参数为0.085,适宜在4个地点进行推广。【结论】长白落叶松家系生长性状在家系间、不同年度及不同地点间具有丰富的遗传变异,筛选出的优良家系适合在东北三省及立地条件相似的地区进行推广。

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

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.

Key words: Larix olgensis, growth trait, genetic variation, stability analysis, superior family, early selection

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