泡桐优良无性系“TF33”干材表型性状杂种优势研究  

Heterosis of Phenotypic Characters of Paulownia Elite Clone Stem Timber

作　　者：王楠[1] 李芳东[1] 马跃[2] 叶金山[1] 

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热带林业实验中心,广西凭祥532600

出　　处：《林业科学研究》2015年第3期402-408,共7页Forest Research

基　　金：国家林业局植物新品种测试指南及已知品种数据库(20050012)

摘　　要：以"毛泡桐×白花泡桐"的优良无性系TF33和两个标准对照品种(白花泡桐C001与兰考泡桐C125)为试验材料,研究了泡桐优良无性系干材表型性状的杂种优势。结果表明:(1)TF33、C001、C125无性系间各性状存在广泛和显著的变异;(2)3个生长性状(接干高、接干材积和主干材积)与3个干形性状(通直度、接干形数和主干平均削度)为高度变异性状(CV≥30%),CV变幅为33.10%53.19%;(3)接干因子是影响和决定性状杂种优势最终状况和总体表现的最重要因素;(4)通直度性状的遗传改良是毛泡桐×白花泡桐杂种无性系干形遗传改良的关键和瓶颈;(5)多数性状间存在极显著或显著的相关性,且不同的性状间相关性变化较大;(6)TF33较C001有显著的材积生长杂种优势,较C125没有显著杂种优势。The heterosis of phenotypic characters of Paulownia elite clone stem timber were studied with elite clone of P. tomentosa x P. fortunei （ TF33 ） and two standard trail varieties, P. fortunei （ C001 ） and P. elongate （ C125 ）, as experimental materials. The results are as follows. （ 1 ）There were extensive and significant variation among characters at clone level among TF33, C001 and C125. （2）Three growth characters （height of stem-join, volume of stem-join and volume of main stem） and three trunk form characters （ straightness of stem, stem-join form-factor and average taper of main stem） had high variation. The coefficient of variation （CV） ranged from 33.10% to 53. 19%. 2 （3）The height of stem-join factor played a vital role in influencing and determining general expression and total status of traits heterosis. （4） Straightness of stem was the key and bottleneck to the genetic im- provement of P. tomentosa x P. fortunei on the stem form characters. （5） Most of the characters correlated very sig- nificantly or significantly and the correlations between different characters changed greatly. （6）TF33 had very prom- inent volume growth heterosis over C001. There was no remarkable heterosis compared with C125.

关 键 词：泡桐 优良无性系 TF33 杂种优势 TF33 

分 类 号：S792.43[农业科学—林木遗传育种]