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当前位置: 首页 > 文章 > 北亚热带高山区日本落叶松自由授粉家系遗传测定与二代优树选择 林业科学 2010,46 (8) 49-54
Position: Home > Articles > Genetic Test of Open-Pollinated Larix kaempferi Families and Selection for the Second Generation Elite Trees in Northern Sub-Tropical Alpine Area Scientia Silvae Sinicae 2010,46 (8) 49-54

北亚热带高山区日本落叶松自由授粉家系遗传测定与二代优树选择

作  者：
杨秀艳;张守攻;孙晓梅;宋丛文;陈柏如;侯义梅
单  位：
湖北省建始县林业局;湖北省林业科学研究院;中国林业科学研究院林业研究所
关键词：
日本落叶松;自由授粉家系;遗传变异;选择;二代优树;高世代种子园
摘  要：
分析日本落叶松自由授粉家系子代测定林(5块试验林,119个家系,1962个单株)生长性状的遗传变异,旨在开展二代优树选择,为在湖北等北亚热带高山区建立第2代种子园提供种质资源。研究结果表明:各遗传测定林生长性状在家系间差异显著。胸径、树高及材积性状的单株遗传力分别为0.18～0.73,0.17～0.59和0.19～0.78,家系遗传力为0.34～0.80,0.42～0.79和0.18～0.81,单株遗传力一般低于家系遗传力。利用最佳线性预测(BLP)估算单株育种值。对比配合选择和家系/家系内选择2种选择方法表明,配合选择得到的二代优树群体遗传多样性高于由家系/家系内选择得到的二代优树群体,2种方法所得到的预期遗传增益相似。基于兼顾高遗传增益和广泛遗传基础的原则,认为配合选择方法选出的二代优树更适合用于日本落叶松高世代种子园的建立。最终采用配合选择方法选出来自49个家系的二代优树137株;5块子代测定林入选二代优树的材积期望遗传增益分别为26%,98.3%,42.9%,24%和56.4%。
译  名：
Genetic Test of Open-Pollinated Larix kaempferi Families and Selection for the Second Generation Elite Trees in Northern Sub-Tropical Alpine Area
作  者：
Yang Xiuyan1 Zhang Shougong1 Sun Xiaomei1 Song Congwen2 Chen Bairu3 Hou Yimei3 (1. Key Laboratory of Tree Breeding and Cultivation of State Forestry Administration Research Institute of Forestry,CAF Beijing 100091; 2. Hubei Academy of Forestry Wuhan 430075; 3. Jianshi Forestry Bureau of Hubei Province Jianshi 445300)
关键词：
Larix kaempferi; open-pollinated family; genetic variation; selection; second generation elite tree; advanced generation seed orchard
摘  要：
The genetic variation of growth traits of 119 Larix kaempferi families including 1 962 individuals from 5 open- pollinated progeny test forests were analyzed to select the second generation elite trees for the second generation orchard in northern sub-tropical alpine region of Hubei Province. The results showed there was significant difference in growth traits among different families. Individual and family heritability of DBH,height and volume ranged from 0. 18 to 0. 73,0. 17 to 0. 59,0. 19 to 0. 78,and 0. 34 to 0. 80,0. 42 to 0. 79,0. 18 to 0. 81,respectively. Individual heritability of the three traits usually was lower than their family heritability. Individual breeding values were predicted by using the best linear prediction approach. Comparison between combined selection and family /within-family selection showed that the second generation elite tree populations that were established by combined selection had a higher genetic diversity than that established by family /within-family selection,but the two selection methods got nearly common expected genetic gains. In terms integration of high genetic gain and genetic diversity,elite trees chosen by combined selection were more suitable to establish the advanced-generation seed orchard. As a result,total 137 individuals derived from 49 different families were selected as the second generation elite trees by combined selection; and the expected genetic gains of 5 progeny test stands were 26% ,98. 3% ,42. 9% ,24% and 56. 4% ,respectively.

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