| 25年生大花序桉种源生长与形质性状的遗传变异及选择 |
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| 引用本文： | 王建忠,熊涛,张磊,李蔷薇,费晓云,石前,黎怀玲,兰俊.25年生大花序桉种源生长与形质性状的遗传变异及选择[J].林业科学研究,2016,29(5):705-713. |
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| 作者姓名： | 王建忠 熊涛 张磊 李蔷薇 费晓云 石前 黎怀玲 兰俊 |
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| 作者单位： | 广西国有东门林场, 广西 扶绥 532108;广西国有东门林场, 广西 扶绥 532108;广西国有东门林场, 广西 扶绥 532108;广西国有东门林场, 广西 扶绥 532108;广西国有东门林场, 广西 扶绥 532108;广西国有东门林场, 广西 扶绥 532108;广西国有东门林场, 广西 扶绥 532108;广西国有东门林场, 广西 扶绥 532108 |
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| 基金项目： | 广西林业科技项目“大花序桉良种组培快繁技术研究”（桂林科研[2015]第18号） |
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| 摘 要： | 目的]研究广西国有东门林场25年生大花序桉种源生长与形质性状的遗传变异,筛选优良种源及单株,为大花序桉良种繁育及中大径材培育提供优质遗传材料。方法]采用方差分析、构建性状选择指数方程综合分析等方法,对11个大花序桉种源进行生长与形质性状遗传变异分析及选择。结果]表明:大花序桉胸径(DBH)、树高(H)、单株材积(V)、树干通直度(ST)和树干圆满度(SF)在种源间呈极显著差异;上述5个主要性状的种源遗传力(H2)为0.634 0.895,单株遗传力(h2)为0.136 0.342;以DBH、H、V、ST和SF 5个性状指标构建大花序桉种源/单株选择指数方程,按标准选择出4个优良种源和13株优良单株,优良种源平均材积遗传增益达11.2%,优良单株平均材积遗传增益达29.7%,选择效果尚好。结论]大花序桉5个主要性状遗传变异在种源水平受中度至较强遗传控制,在单株水平受弱度遗传控制。优良种源D47、S14127、B47和S12195生长材性兼优,可用作培育优质中大径材。
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| 关 键 词： | 大花序桉 种源 遗传变异 选择 |
| 收稿时间： | 2015/6/17 0:00:00 |
Genetic Variation and Selection on Growth and Stem Form Quality Traits of 25-year-old Eucalyptus cloeziana Provenance |
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| WANG Jian-zhong,XIONG Tao,ZHANG Lei,LI Qiang-wei,FEI Xiao-yun,SHI Qian,LI Huai-ling and LAN Jun.Genetic Variation and Selection on Growth and Stem Form Quality Traits of 25-year-old Eucalyptus cloeziana Provenance[J].Forest Research,2016,29(5):705-713. |
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| Authors: | WANG Jian-zhong XIONG Tao ZHANG Lei LI Qiang-wei FEI Xiao-yun SHI Qian LI Huai-ling and LAN Jun |
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| Institution: | Guangxi Dongmen Forest Farm, Fusui 532108, Guangxi, China;Guangxi Dongmen Forest Farm, Fusui 532108, Guangxi, China;Guangxi Dongmen Forest Farm, Fusui 532108, Guangxi, China;Guangxi Dongmen Forest Farm, Fusui 532108, Guangxi, China;Guangxi Dongmen Forest Farm, Fusui 532108, Guangxi, China;Guangxi Dongmen Forest Farm, Fusui 532108, Guangxi, China;Guangxi Dongmen Forest Farm, Fusui 532108, Guangxi, China;Guangxi Dongmen Forest Farm, Fusui 532108, Guangxi, China |
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| Abstract: | Objective] A 25-year-old Eucalyptus cloeziana provenance trial was conducted in Guangxi Dongmen Forest Farm to analyze the genetic variation of the growth and stem form quality traits in order to select the superior provenances and individuals for further study in medium and large diameter of wood and seed breeding.Method] The genetic variation of growth and stem form quality traits of 11 E. cloeziana provenances were analyzed and selected by variance analysis and comprehensive analysis of the building of the equation based on the trait selection index. Result] The results showed highly significant differences in diameter at breast height (DBH), tree height (H), individual tree volume (V), stem straightness (ST) and stem fullness (SF) among 11 Eucalyptus cloeziana provenances. The heritabilities(H2)of five main traits was 0.634~0.895, and individual heritabilities(h2)was 0.136~0.342, selection index equations of provenances and individuals were built based on DBH, H, V, ST and SF. According to this standard, 4 superior provenances and 13 superior individuals were selected, and the genetic gain of volume reached 11.2% and 29.7% respectively. Conclusion] These results indicate that the genetic variation of the five main traits is under a strong genetic control at provenance level and a lower genetic control at individual tree level. In consideration of rapid growth and fine wood property, the provenances D47, S14127, B47 and S12195 are superior materials for further study in medium and large diameter of wood breeding. |
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| Keywords: | Eucalyptus cloeziana provenance genetic variation provenance selection |
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