马尾松3代种质幼林生长性状遗传效应及其与环境互作  

Genetic Effects of Growth Traits for the Third Generation Pinus massoniana Germplasm and the Interaction with Environment

作　　者：董虹妤 刘青华[1] 金国庆[1] 丰忠平[2] 甘振栋 周志春[1] 

机构地区：[1]中国林业科学研究院亚热带林业研究所,浙江省林木育种技术研究重点实验室,国家林业局马尾松工程技术研究中心,浙江杭州311400 [2]浙江省淳安县姥山林场,浙江淳安311700 [3]福建省邵武市卫闽国有林场,福建邵武354006

出　　处：《林业科学研究》2015年第6期775-780,共6页Forest Research

基　　金：国家林业公益性行业科研专项重大项目“重要树种种质资源保存与可持续利用关键技术研究”(201204307);“十二·五”国家科技支撑计划课题“南方针叶树高世代育种技术研究与示范”(2012BA01B02);浙江省竹木农业新品种选育重大科技专项项目“马尾松高世代育种及其品种示范”(2012C12908-12);福建省林木种苗科技攻关四期项目马尾松课题

摘　　要：利用分别设置在浙江省淳安县姥山林场和福建省邵武市卫闽国有林场的3年生6×6半双列遗传交配设计3代子代测定幼林，对马尾松生长性状的遗传效应及其与环境互作效应进行研究。结果表明：马尾松树高和地径的配合力效应及其配合力与环境互作效应皆达到显著或极显著水平。在遗传效应中，树高在两地点皆以加性基因效应控制为主，显性基因效应次之；而地径在卫闽点主要受加性基因效应控制，在姥山点则主要受显性基因效应控制。在不同环境下，对树高和地径表型影响从大到小依次为环境效应〉加性基因效应〉显性基因效应与环境互作〉显性基因效应〉加性基因效应与环境互作。参试性状的一般配合力（GCA）稳定性普遍高于特殊配合力（SCA）稳定性。以树高生长量为选择指标，在2个试验点各初选2个优良亲本和5个优良杂交组合，姥山点和卫闽点优良亲本的遗传增益分别是试验平均的5．61％～8．05％和10．22％～12．98％，是当地优良天然林分子代的45．11％～48．48％和51．84％～55．64％，而优良组合的遗传增益分别是试验平均的3．37％～17．69％和9．35％～25．93％，是当地优良天然林分子代的42．04％～61．72％和50．64％～73．48％。Two samples of 3-year-old Pinus massoniana grown in Laoshan forest farm of Zhejiang Province and We- imin State-owned Forest Farm of Fujian Province respectively were used to investigate the genetic effects and the in- teraction with environment on growth traits in the 6 x 6 half diallel cross design. The results showed that the combi- ning ability and the interactions of combining ability with environment were significant effective in the height and DBH. The additive gene effects of height played a major role in the two research site. The DBH appeared to be controlled mainly by the additive gene effects in Weimin site, while controlled primarily by the dominance gene effects in Laoshan site. The performance of tree height, DBH and stem volume were controlled mainly by the environment effects and secondly by the additive gene effects and the interactions of dominance gene effect with environment and the dominance gene effects, the interactions of additive gene effect with environment played the weakest role under different environment conditions. The stability of general combining ability （GCA） was significantly higher than that of the specific combining ability （SCA）. Based on tree growth index, 2 superior parents and 5 superior combina- tions were preliminarily selected for the two samples respectively. The gains of superior parents for the two test sam- ples were 5.61% - 8.05% and 10.22% - 12.98% compared with the mean value, 45. 11% -48.48% and 51.84% -55.64% compared with the progeny of the original high-quality stands. The gains of superior combina- tions were 3.37% - 17.69% and 9.35% -25.93% compared with the mean value of the test samples, 42.04% - 61.72% and 50.64% -73.48% compared with the progeny of the original high-quality stands.

关 键 词：马尾松 3代 GCA SCA 基因与环境互作 

分 类 号：S791.248[农业科学—林木遗传育种]