尾叶桉优良家系子代的遗传变异研究  

Genetic Variation of E. urophylla Progenies Selected from Superior Families

作　　者：何国华[1] 林桦[1] 陈文平[1] 卢万鸿[2] 

机构地区：[1]中国国营林场开发总公司国营雷州林业局,广东遂溪524348 [2]国家林业局桉树研究开发中心,广东湛江524022

出　　处：《桉树科技》2009年第1期13-17,共5页Eucalypt Science & Technology

基　　金：国营雷州林业局课题"桉树良种选育研究";国家"十一五"科技支撑项目"高产优质桉树速生材树种新品种选育"(2006BAD01A1504);国家林业局948项目"辐射霜冻气候室用于耐寒桉树定向选育技术引进"(2008-4-09)的研究内容

摘　　要：以选自尾叶桉第1代种子园的72个优良家系为研究材料,对它们10年生树高、胸径、材积、树皮厚度、木材密度指数进行了遗传差异分析和遗传力估算。结果表明:研究的所有性状在家系母本的种源间、家系间均存在非常显著的差异;平均胸径、树高、单株材积分别为:16.85cm、14.16m、0.117m3,平均树皮厚度和木材密度指数分别为0.93cm和28.23;胸径、树高和材积的单株遗传力在0.142～0.174之间,树皮厚度和木材密度指数的遗传力分别为0.061和0.143。从中筛选出17567、16682、17565为优良种源,109、121、97、103等家系为优良家系。72 families selected from 1st generation E.urophylla seed orchard were studied,whose morthers were from 15 provenances.Genetic variation and heritability were established for their 10-year-old DBH,Ht,stem volume,bark thickness and wood density index.The reuslts showed that there were very significant differences between provenances and between families for all the traits studied here.The means of 10-year-old DBH,Ht and stem volume were 16.85 cm,14.16 m and 0.117 m3 respectively.Mean bark thickness and wood ...

关 键 词：尾叶桉 家系 子代 遗传变异 

分 类 号：S792.39[农业科学—林木遗传育种]