摘要
【目的】马尾松是我国南方重要速生用材树种之一。研究10个马尾松无性系在不同试验点胸径和树高生长性状的变异特征和遗传稳定性,筛选高遗传增益的优良基因型推广利用,为马尾松适地适基因型高效栽培和人工林提质增效提供试验依据。【方法】以在广西宁明县(E1)、柳州市(E2)、博白县(E3)和钦州市(E4)营建的10个3年生马尾松无性系(M1~M10)区域试验林为对象,测定胸径和树高生长,分析不同基因型生长性状差异和变异规律,开展无性系稳定性分析和综合评价,筛选生产力高和稳定性好的优良基因型。【结果】马尾松无性系生长变异丰富,同一地点无性系间总变异和同一无性系地点间总变异均表现为胸径大于树高。多点联合方差分析表明:基因型、环境条件、基因型与环境互作效应对马尾松无性系胸径和树高生长都有极显著影响(P<0.01),试验点内无性系间生长表现不同,无性系在不同试验点间生长表现也存在较大差异。不同地点无性系胸径和树高的重复力处于0.59~0.89之间,生长性状主要受遗传控制。遗传稳定性分析结果表明:M1、M2、M4、M5和M7等5个无性系胸径和树高生长速度较快且稳定性良好,M8对E1试验点具有特殊适应性。对4个试验点的马尾松无性系胸径和树高生长进行综合评价,筛选出M1、M2、M4、M5、M75个优良无性系,胸径和树高遗传增益分别比种子园良种实生苗提高37.90%~45.65%和21.92%~24.38%。【结论】马尾松胸径和树高生长性状在无性系间变异丰富,基因型、环境和基因型与环境的互作效应对马尾松无性系的生长性状产生了极显著影响;M1、M2、M4、M5和M7等5个无性系生长迅速且稳定,遗传增益较高,可在马尾松栽培区适当推广。
[Objective]Pinus massoniana is one of the important fast-growing timber species in south China.In this study,phenotypic and genetic stability of DBH and tree height traits of 10 Pinus massoniana clones were studied at multiple sites,and excellent genotypes with high genetic gain were screened,so as to provide experimental basis for efficient cultivation of Pinus massoniana with suitable genotypes and quality and efficiency improvement of plantation.[Method]The DBH and tree height of 103-year-old Pinus massoniana clones(M1−M10)were measured from regional experimental forest in Ningming County(E1),Liuzhou City(E2),Bobai County(E3)and Qinzhou City(E4)of Guangxi,southern China.The growth traits and phenotypic variation of different genotypes were analyzed.Clone stability analysis and comprehensive evaluation were carried out to screen excellent genotypes with high productivity and good stability.[Result]The growth variation of Pinus massoniana clones was rich,the total varation of DBH between clones at the same site and between clones at the same site was greater than tree height.Multi-point joint variance analysis showed that genotype,environmental conditions and genotype-environment interaction had significant effects on DBH and tree height growth of Pinus massoniana clones(P<0.01).The growth performance of clones within the test site was different,and the growth performance of clones among different test sites was also different.The repeatability of DBH and tree height of clones at different sites was between 0.59 and 0.89,indicating they were mainly controlled by heredity.The results of genetic stability analysis showed that the DBH and tree height of M1,M2,M4,M5 and M7 clones grew faster and had good stability.Clone M8 had a special adaptability to the test site at Ningming County.Five superior clones(M1,M2,M4,M5,M7)were selected by comprehensive evaluation of DBH and tree height across four experimental sites.The genetic gains of DBH and tree height were increased by 37.90%−45.65%and 21.92%−24.38%,respect
作者
王胤
姚瑞玲
陈振华
甘德煜
彭健
Wang Yin;Yao Ruiling;Chen Zhenhua;Gan Deyu;Peng Jian(Guangxi Forestry Research Institute,Nanning 530002,Guangxi,China;Guangxi State-Owned Paiyangshan Forest Farm,Ningming 532500,Guangxi,China;Guangxi State-Owned Bobai Forest Farm,Bobai 537617,Guangxi,China;Guangxi State-Owned Sanmenjiang Forest Farm,Liuzhou 545006,Guangxi,China)
出处
《北京林业大学学报》
CAS
CSCD
北大核心
2023年第5期47-56,共10页
Journal of Beijing Forestry University
基金
国家自然科学基金项目(32260381、31960311)
广西林业科技推广示范项目(桂林科研[2021]3号)
广西科技计划项目(2018GXNSFDA281020)。
关键词
马尾松
无性系
互作效应
遗传变异
生长性状
Pinus massoniana
clone
interaction effect
genetic variation
growth trait
