越南南亚松引种家系遗传变异和早期选择  

Genetic Variation and Early Selection of Families of Pinus latteri Introduced from Vietnam

作　　者：苏潇 罗发源 庞海恩 罗以达 陈宗帅 杨章旗[2] 唐生森 Su Xiao;Luo Fayuan;Pang Hai'en;Luo Yida;Chen Zongshuai;Yang Zhangqi;Tang Shengsen(Guangxi State-owned Qinlian Forest Farm,Qinzhou,Guangxi 547200,China;Guangxi Forestry Research Institute,Nanning,Guangxi 530002,China)

机构地区：[1]广西壮族自治区国有钦廉林场,广西钦州547200 [2]广西壮族自治区林业科学研究院,广西南宁530002

出　　处：《广西林业科学》2024年第6期709-713,共5页Guangxi Forestry Science

基　　金：广西院士后备人才培育项目(桂AD19254004);广西八桂学者专项(2019A026);广西优良用材林资源培育重点实验室自主课题(22-A-01-04)。

摘　　要：为筛选适宜广西沿海地区栽培的南亚松(Pinus latteri)优良家系,以引种的29个越南南亚松家系5年生遗传测定林为研究对象,进行生长性状方差分析和遗传参数估算,开展早期选择与评价。结果表明,29个南亚松家系生长性状均差异极显著,存在丰富变异。南亚松参试家系的树高、胸径和材积家系遗传力分别为0.394、0.351和0.391,均属中等遗传力;树高、胸径和材积单株遗传力分别为0.144、0.122和0.142,均属低等遗传力。以单株材积为评价指标,筛选出15-715、15-707、15-704、15-719和15-726家系为优良家系,材积遗传增益为9.3%;筛选出优良单株16株,平均材积为0.0257 m^(3),材积遗传增益为14.2%。In order to screen excellent families of Pinus latteri suitable for cultivation in coastal areas of Guangxi,5-year-old genetic determination forests of 29 P.latteri families introduced from Vietnam were selected as research objects.Analysis of variance on growth traits and estimation of genetic parameters were carried out,and early selection and evaluation were carried out.Results showed that there were extremely significant differences in growth traits among 29 families,and there were abundant variations.Family heritability of tree height,DBH and volume of tested families were 0.394,0.351 and 0.391 respectively,all of which belonged to moderate heritability.Individual heritability of tree height,DBH and volume were 0.144,0.122 and 0.142 respectively,all of which belonged to low heritability.Five superior families of 15-715,15-707,15-704,15-719 and 15-726 were selected with volume as evaluation index,and genetic gain of volume was 9.3%.A total of 16 superior individual plants were screened out,with average volume of 0.0257 m^(3) and genetic gain of volume was 14.2%.

关 键 词：子代测定 遗传变异 家系选择 南亚松 

分 类 号：S722.83[农业科学—林木遗传育种]