马尾松半同胞家系子代林早期生长差异分析  

Early growth analysis on half-sib progenies of Pinus massoniana

作　　者：胡云 胡泽军 高大雄 朱玫[2] 宋亚莉[3] 肖宋高[4] 王珍[5] 周欢 张卓文[5] 

机构地区：[1]湖北省太子山林场管理局,湖北京山431800 [2]湖北生态工程职业技术学院,湖北武汉430200 [3]湖北省林业科学研究院,湖北武汉430075 [4]国家林业局西北林业勘察设计院,陕西西安710048 [5]华中农业大学园艺林学学院,湖北武汉430070

出　　处：《福建农林大学学报（自然科学版）》2012年第4期493-497,共5页Journal of Fujian Agriculture and Forestry University:Natural Science Edition

基　　金：湖北省科技厅资助项目(鄂科2001-75);湖北省林业厅资助项目(鄂2001-43)

摘　　要：以湖北省京山县太子山林场管理局马尾松无性系嫁接种子园半同胞8年生子代林为研究对象,在对胸径、树高、枝下高、冠幅和材积等生长因子进行实地调查的基础上进行遗传力分析.结果表明:不同半同胞家系林木各生长因子之间存在极显著性差异,显示马尾松半同胞家系林木间存在较为丰富的遗传变异,具有较大的选育潜力;8年生马尾松半同胞家系子代林树高、胸径和材积的遗传力分别为0.7436、0.6055和0.6500;采用20%的入选率时,筛选出5个优良半同胞家系且入选半同胞家系的材积、树高和胸径遗传增益分别为51.34%、17.45%和22.19%.Using 8 years old half-sib progenies of Pinus massoniana stand from seed orchard of Jingshan County, Hubei Province as materials, growth factors such as diameter at breast height （DBH）, tree height, height under branch, crown diameter and timber volume were measured. Results showed that there were significant differences for growth factors measured among different half-sib progenies, indicating that there were abundant genetic variation among half-sib progenies and potentials for selection. The heritabili- ty values of height, DBH and timber volume of 8 years old P. masson/ana stand were 0.7436, 0.6055 and 0.6500, respectively. U- sing 20% as selection percentage, 5 superior half-sib progenies families could be selected, and genetic gains of timber volume, height and DBH were 51.34%, 17.45% and 22.19%, respectively.

关 键 词：马尾松 半同胞家系 子代林 遗传力 遗传增益 

分 类 号：S791.248[农业科学—林木遗传育种]