文献类型：期刊文献

中文题名：云南松半同胞家系表型变异与早期选择

英文题名：Phenotypic Variation and Early Selection of Half-sib Families of Pinus yunnanensis

作者：李仲牧[1,2] 车凤仙[3] 高成杰[2] 李瑾[2] 王璐[2] 崔凯[2]

第一作者：李仲牧

机构：[1]西南林业大学林学院,昆明650224;[2]中国林业科学研究院高原林业研究所,昆明650233;[3]弥渡县林木良种培育站,云南弥渡675600

年份：2024

期号：1

起止页码：102-110

中文期刊名：林草资源研究

外文期刊名：Forest Resources Management

收录：;北大核心:【北大核心2023】；

基金：“十四五”国家重点研发计划“湿地松与云南松高生产力高产脂新品种选育研究”(2022YFD2200204)。

语种：中文

中文关键词：云南松;半同胞家系;遗传变异;早期选择

外文关键词：Pinus yunnanensis;half-sib families;genetic variation;early selection

分类号：S722

摘要：云南松(Pinus yunnanensis)是我国西南地区特有的乡土树种,分布于青藏高原东南缘,其遗传退化问题严重。为加速育种进程和拓宽云南松的遗传资源,基于对营养生长性状(树高、地径、长冠径、短冠径、枝下高、当年生主枝长、当年生侧枝数)和生殖生长性状(球果数量)的系统分析,对95个云南松半同胞家系开展早期评价与选择。结果表明:1)云南松在各家系间营养生长性状存在显著差异,表明其具有丰富的遗传变异和选择潜力;2)表型性状的表型变异系数和遗传力分别为21.60%~86.07%和0.75~0.78,表明云南松各性状变异较大,且受遗传控制较强;3)表型性状之间具有较强的相关性,通过对营养生长性状的聚类分析,将95个家系分为3类;4)通过对云南松营养生长性状进行隶属函数分析,筛选出10个优良家系,其树高的遗传增益和实际增益最高为19.63%和25.17%,地径的为12.39%和15.89%。云南松半同胞家系之间存在丰富的表型变异,基于营养生长性状筛选出10个优良家系,该结果可为云南松良种选育提供理论基础。
Pinus yunnanensis is a unique native species to Southwest China,distributed in the southeastern margin of the Qinghai-Tibet Plateau,and its genetic degradation is a serious concern.To accelerate the breeding process and diversify the genetic resources,95 half-sib families of P.yunnanensis were evaluated and selected in the early stage based on the systematic analysis of nutritional growth traits(plant height,ground diameter,long crown diameter,short crown diameter,height under the branches,length of primary branches in the current year,and number of lateral branches in the current year)and reproductive growth traits(number of cones).The results indicated that:1)there were significant differences in nutritional growth traits among families of P.yunnanensis,indicating that it had rich genetic variation and selection potential.2)The coefficient of variation and heritability of phenotypic traits were 21.60%~86.07%and 0.75~0.78,respectively,indicating that the traits of P.yunnanensis had large variation,and they are strongly controlled by genetics.3)There is a strong correlation between phenotypic traits.By performing cluster analysis on the nutritional growth traits,the 95 families can be divided into three categories.4)By conducting a membership function analysis on the nutritional growth traits of P.yunnanensis,10 superior families were selected,and the genetic gain and actual gain of plant height were up to 19.63%and 25.17%,respectively,and ground diameter were up to 12.39%and 15.89%,respectively.There were abundant phenotypic variations among half-sib families of P.yunnanensis,and 10 superior families were selected based on vegetative growth traits.The results can provide material support and a theoretical basis for the breeding of improved varieties of P.yunnanensis.