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林业科学 ›› 2011, Vol. 47 ›› Issue (3): 178-183.doi: 10.11707/j.1001-7488.20110327

• 研究简报 • 上一篇    下一篇

火炬松×加勒比松F1代生长、树干通直度和基本密度遗传和配合力分析

栾启福1, 姜景民1, 张建忠2, 张守攻3   

  1. 1. 中国林业科学研究院亚热带林业研究所 富阳 311400;2. 杭州市余杭区长乐林场 杭州 311123;3. 中国林业科学研究院林业研究所 北京 100091
  • 收稿日期:2010-01-05 修回日期:2010-04-01 出版日期:2011-03-25 发布日期:2011-03-25
  • 通讯作者: 姜景民

Estimation of Heritability and Combining Ability for Growth, Stem-Straightness and Wood Density of the F1 Generation of Pinus taeda×P. caribaea

Luan Qifu1, Jiang Jingmin1, Zhang Jianzhong2, Zhang Shougong3   

  1. 1. Research Institute of Subtropical Forestry, CAF Fuyang 311400;2. Changle Forestry Centre,Hangzhou,Zhejiang Province Hangzhou 311123;3. Research Institute of Forestry, CAF Beijing 100091
  • Received:2010-01-05 Revised:2010-04-01 Online:2011-03-25 Published:2011-03-25

关键词: 火炬松×, 加勒比松, 生长性状, 基本密度, 树干通直度, 遗传力, 配合力

Abstract:

The genetic characteristics and combining ability for growth,stem-straightness and wood density were estimated on 16 seven-year-old F1 families derived from crossing with 4 female and 4 male parents of Pinus taeda×P. caribaea with the NC II mating design. Analysis of variance showed that there were significant differences(P<0.01) in growth and wood basic density among 16 crosses, and (P<0.05) in stem-straightness. The heritability (h2) analysis showed that family mean heritability of growth,stem-straightness and wood density for female parents was higher than that for male parents, while the mean h2 for the full-sib families was in the middle of the parents heritability. The h2 of growth was 0.292 3-0.469 9 for female parents, and 0.191 9-0.403 3 for male parents. The family mean and single tree h2 of wood basic density for female parents was 0.176 4 and 0.034 6, respectively, and the single tree h2 of stem-straightness for male and female parents was 0.162 7 and 0.098 3, respectively. The heritability of DBH and volume was increasing in the last 6 years while the heritability of tree height was decreasing. The analysis of genetic correlation showed that growth traits had positive correlation (|rG| =0.467 2-0.351 6) with stem-form, and had a negative one(|rG| =0.220 3-0.679 8) with wood basic density. The general combining ability (GCA) effect of male or female parents for growth traits and stem-straightness was significantly different, and their special combining ability (SCA) effect for wood basic density was significant. The effective value of combining ability for GCA and SCA was estimated and the better parents and hybrids were evaluated. The correlation between genetic background of the parents and genetic differences of the progenies was discussed.

Key words: Pinus taeda×, P. caribaea, growth traits, wood basic density, stem-straightness, heritability, combining ability

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