南方低山丘陵区泡桐无性系主要性状的综合选择  

Comprehensive Selection of Main Phenotypic Characters of Paulownia Clones in the Hilly Area of Southern China

作　　者：冯延芝 乔杰[1,2] 王保平[1,2] 赵阳[1,2] 周海江[1,2] 段伟[1,2] 李芳东[1,2] 

机构地区：[1]国家林业局泡桐研究开发中心,河南郑州450003 [2]中国林业科学研究院经济林研究开发中心,河南郑州450003

出　　处：《林业科学研究》2017年第6期969-976,共8页Forest Research

基　　金："十二五"国家科技支撑计划(2012BAD01B0602)

摘　　要：[目的]为了选育出适宜南方低山丘陵区栽植的白花泡桐优良无性系。[方法]以湖北省赤壁市5年生的18个泡桐无性系为研究对象,对其4个生长性状(胸径、主干高、总材积、接干高)和2个干形性状(主干削度、形数)进行变异分析、遗传参数估算、性状间的相关性分析以及多性状综合评价。[结果]结果表明:各性状在无性系间的差异均达到极显著水平。胸径、主干高、总材积、接干高和形数的重复力较大,均在0.785 8以上,主干削度的重复力较小(0.516 3)。胸径、主干高、总材积和接干高之间均呈极显著的表型和遗传正相关关系;除与主干高、接干高分别呈不显著和显著的表型负相关外,主干削度与其它性状间的表型和遗传负相关关系均达极显著水平;除与主干高呈不显著的表型正相关外,形数与其它性状间的表型和遗传相关关系均达极显著水平;通过多性状选择指数方程选择出的3个优良无性系与CK相比,其胸径、主干高、总材积、接干高、主干削度和形数的遗传增益分别为13.33%、6.59%、28.68%、40.08%、12.99%和8.89%,实际增益分别为13.82%、7.55%、32.04%、43.31%、25.16%和11.31%。[结论]依据建立的多性状指数方程,选择出适宜在南方低山丘陵区栽植的白花泡桐优良无性系3个,分别为01-23、01-22和1-58,入选率17%。[Objective] To screen the superior clones of Paulownia fortunei suitable for planting in the hilly area of Southern China. [Method] Eighteen 5-year-old P. fortunei clones in Chibi City, Hubei Province were used to conduct the variation analysis, genetic parameter evaluation, correlation analysis and comprehensive assessment on four growth traits[diameter （D1.3）, height of trunk （H）, total volume （V） and height of extended trunk （H2）] and two stem form traits[taper of trunk （β） and form factor （f）]. [Result] Extremely significant differences （P〈0.01） were observed in each of the six traits among these 18 clones. The repeatability of D1.3, H, V, H2 and f was higher than 0.7858, the repeatability of β was 0.516 3. Extremely significant positive phenotypic and genetic correlations were shown among D1.3, H, V and H2; The β showed no significant negative phenotypic correlation with H but significant negative phenotypic correlation with H2. In addition, the β showed significantly negative phenotypic and genetic correlation with the other traits; The f showed no significant positive phenotypic correlation with H but extremely significant phenotypic and genetic correlation with the other traits. Comparing with the CK, the genetic gains of the three clones selected by comprehensive selection index equation on D1.3, H, V, H2, β and f were 13.33%, 6.59%, 28.68%, 40.08%, 12.99% and 8.89%, and the actual gains were 13.82%, 7.55%, 32.04%, 43.31%, 25.16% and 11.31%, respectively. [Conclusion] With the selection rate of 17%, three clones were selected and evaluated as the superior clones from 18 P. fortunei clones by the method of comprehensive selection index.

关 键 词：泡桐 无性系 表型变异 遗传变异 多性状选择指数 

分 类 号：S792.43[农业科学—林木遗传育种]