马尾松桐棉种源优树子代遗传测定与选择  

Genetic Determination and Selection of Progeny Tungmian Provenance of Pinus massoniana

作　　者：李鹏 魏文初 邱辉 杨章旗[1,2] 陈虎[1,2] 邱承相 李远明 龙振云 吴东山[1,2] LI Peng;WEI Wenchu;QIU Hui;YANG Zhangqi;CHEN Hu;QIU Chengxiang;LI Yuanming;LONG Zhenyun;WU Dongshan(Engineering Technology Research Center of Masson Pine of Guangxi(Guangxi Forestry Research Institute),Nanning Guangxi 530002,China;Key Laboratory for Cultivation of Excellent Timber Forest Resources in Guangxi(Guangxi Forestry Research Institute),Nanning Guangxi 530002,China;Guangxi Zhaoping Fuluo Forest Farm,Zhaoping Guangxi 546809,China)

机构地区：[1]广西马尾松工程技术研究中心(广西壮族自治区林业科学研究院),广西南宁530002 [2]广西优良用材林资源培育重点实验室(广西壮族自治区林业科学研究院),广西南宁530002 [3]广西昭平县富罗林场,广西昭平546809

出　　处：《广西师范大学学报（自然科学版）》2023年第3期182-190,共9页Journal of Guangxi Normal University:Natural Science Edition

基　　金：广西科技基地和人才专项(桂AD19254004);广西优良用材林资源培育重点实验室开放课题(2020-A-022-03);八桂学者和八桂青年学者项目。

摘　　要：随着马尾松桐棉种源天然林大面积减少、选育程度提高以及遗传多样性减少,有必要开展马尾松桐棉种源优树子代生长性状遗传变异规律研究,筛选遗传品质优良的马尾松家系和单株,为马尾松桐棉种源天然种群的保护和遗传改良提供参考。本文以74个马尾松桐棉种源优树子代半同胞家系为材料,测定其胸径、树高等生长性状,进行遗传变异分析,并将主坐标降维分析与遗传增益分析相结合筛选优良家系与单株。结果表明,马尾松桐棉种源各生长性状(胸径、树高和单株材积)分化明显且家系间差异显著(P<0.05),家系遗传力由大到小依次为单株材积(0.224 5)、胸径(0.107 5)、树高(0.091 0)。采用主坐标分析筛选出8个优良家系,胸径、树高和单株材积的遗传增益分别为1.42%、0.71%、6.68%;从8个优良家系中筛选出23株优良单株,各性状遗传增益分别为5.50%、1.88%、29.15%,选择效果显著。综上,马尾松桐棉种源优树子代生长性状在家系间具有较大的选育潜力,选择出的优良家系和单株可为马尾松桐棉种源天然种群的保护和遗传改良提供极佳的种质资料。With the large-scale reduction of the natural forest of tungmian provenance of Pinus massoniana,as well as the increase in the degree of selection and the reduction in genetic diversity.It is necessary to carry out research on the genetic variation of the growth traits of the progeny of P.massoniana from tungmian provenance,and to provide reference for the protection and genetic improvement of the natural population of P.massoniana from Tungmian provenance.Using 74 half-sib families of tungmian provenance of P.massoniana as materials,the growth traits such as diameter at breast height and tree height were determined and genetic variation analysis was carried out,and the principal coordinate dimensionality reduction analysis method was combined with genetic gain analysis to screen excellent families and individual plants.The results showed that the growth traits(diameter at breast height,tree height and volume per plant)were significantly differentiated and significantly different among families of tungmian provenance of P.massoniana(P<0.05).The order of family heritability was volume per plant(0.2245)>diameter at breast height(0.1075)>Tree height(0.0910).Principal coordinate analysis showed that 8 excellent families were screened out and the genetic gains of each trait were 1.42%,0.71%,and 6.68%.Twenty-three excellent individual plants were screened from 8 excellent families and their genetic gains of each trait were 5.50%,1.88%and 29.15%,and the selection effect was significant.In conclusion,there was great breeding potential among families of superior growth traits of the progeny tungmian Provenance of P.massoniana.The selected excellent families and individual plants could provide excellent germplasm data for the protection and genetic improvement of the natural population of tungmian provenance of P.massoniana.

关 键 词：马尾松 遗传分析 生长性状 半同胞家系 子代测定 

分 类 号：S791.248[农业科学—林木遗传育种] S722[农业科学—林学]