桉树巢式交配设计子代配合力效应分析  

Combining Ability Analysis of Eucalyptus Hybrid Progeny Obtained by Nested Mating Design

作　　者：吴兵 庞贞武 沈云 兰俊 陈东林 黄全东 施东强 

机构地区：[1]广西国有东门林场,广西扶绥532108

出　　处：《安徽农业科学》2013年第28期11410-11413,共4页Journal of Anhui Agricultural Sciences

基　　金：广西科学研究与计划开发项目(桂科攻1123004-3A)

摘　　要：[目的]筛选桉树优良杂交组合。[方法]从东门林场矮化种子园中选取15个无性系作母本,从第一代种子园中选取21个桉树家系作父本,采用巢式遗传交配设计方式进行人工控制授粉,获得的杂交种子育苗建立试验,对桉树巢式交配2.5年生杂交子代的树高、胸径和单株材积3个生长性状进行遗传分析。[结果]树高、胸径和单株材积的差异在母本间、母本内父本间都达到显著水平;母本间一般配合力有差异,表现较好的有5个,最好的是无性系DH33-27,其胸径、树高、材积的GCA效应值分别为1.220、0.870、0.011,其次为DH207-3、DH107-1、DH86-1、DH187-10;杂交组合SCA也有差异,说明GCA与SCA有一定的关联又相对独立。[结论]以单株材积为选择目标,根据单株材积GCA、SCA 2个效应值分析,优选出6个组合,分别为519、473、447、442、526、497。[ Objective ] The purpose was to screen superior hybridized combinations of Eucalyptus. [ Method ] The study trial was established in Dongmen Forest Farm using Eucalypt hybrid seedlings. The hybrid seeds were obtained by artificial pollination with nest - mode mating de- sign where 15 Eucalypt clones from a dwarfed seed orchard were selected as female parents and 21 Eucalypt families from a 1st generation seed orchard were selected as male parents. The genetic analysis for three growth traits, including tree height （HT） , diameter at breast height （DBH） and individual volume （VOL） was carried out in nested mating design Eucalyptus hybrid progenies at the age of 2.5 years. [ Result] There were significant differences （P 〈 O. 05 ） in HT, DBH and VOL among female parents and among male parents. The general combining ability （GCA） was different among female parents. The clone DH33 -27 had the highest GCA, with the GCA value for DBH, HT and VOL being 1. 220, 0.870, 0. 011 respectively, following by DI-I207 - 3, DH107 - 1, DH86 - 1, DH187 - 10. The special combining ability （SCA） was also different. It was indicated that GCA and SCA were relatively independent while their correlation occurred in a certain extent. [ Conclusion] Six.best performing combinations were selected according to the GCA and SCA of VOL, namely 519, 473, 447, 442, 526, 497.

关 键 词：桉树 巢式交配设计 配合力 

分 类 号：S792.39[农业科学—林木遗传育种]