文献类型：期刊文献

中文题名：油茶5×5全双列杂交子代幼林生长性状的配合力分析

英文题名：Analysis of genetic effects of growth traits of Camellia oleifera F1 descendants in complete diallel cross design Ⅲ

作者：林萍[1,2] 姚小华[1,2] 滕建华[3] 王开良[1,2] 任华东[1,2] 叶峰[4]

第一作者：林萍

机构：[1]中国林业科学研究院亚热带林业研究所;[2]浙江省林木育种技术研究重点实验室;[3]浙江省金华市婺城区东方红林场;[4]浙江省青田县林业局

年份：2016

卷号：36

期号：5

起止页码：26-32

中文期刊名：中南林业科技大学学报

外文期刊名：Journal of Central South University of Forestry & Technology

收录：CSTPCD;;北大核心:【北大核心2014】；CSCD:【CSCD_E2015_2016】；

基金：国家自然科学基金青年基金项目"基于LD作图的油茶不饱和脂肪酸含量变异位点研究"(31400580);中国林科院亚热带林业研究所中央级公益性科研院所基本科研业务费专项资金项目"普通油茶杂交育种亲本选配规律研究"(RISF2013008)

语种：中文

中文关键词：油茶;完全双列杂交Ⅲ;一般配合力;特殊配合力;反交效应

外文关键词：Camellia oleifera; complete diallel cross design Ⅲ; general combining ability（GCA）; specific combining ability（SCA）; reciprocal effects

分类号：S794.4

摘要：以浙江省金华市东方红林场油茶5×5全双列交配杂交组合（无自交）子代林为试材,分析了2年生苗造林当年树高、地径和冠幅的遗传变异规律,估算了油茶亲本的遗传参数。结果表明：树高、地径和冠幅在20个杂交组合间均存在显著的遗传差异,40×95和10×40两个组合在树高、地径和冠幅性状上均表现最优;树高和冠幅的一般配合力、特殊配合力和反交效应差异极显著,地径的一般配合力和反交效应也差异极显著,特殊配合力无显著差异;长林40号树高、地径和冠幅3个性状的一般配合力均最高,在0.05水平上显著高于其余亲本,这与该良种长势旺的特性一致;长林53号作为亲本,在树高、地径和冠幅上的一般配合力均最低,这与53号无性系良种长势偏弱、树冠矮小的特点一致;3个性状的加性方差分别是非加性方差的1.25倍、19.5倍和1.60倍,均受基因的加性效应控制为主,非加性效应次之;遗传力较低,广义遗传力在14.91%~20.62%之间,狭义遗传力在9.55%~14.14%之间,受到较强的环境效应影响;综合分析GCA、SCA及反交效应,确定5个最佳组合,其杂交子代树高和冠幅分别实现5.76%~45.62%和7.68%~127.10%的遗传增益。可见,油茶杂交育种中,针对树高、地径和冠幅等生长性状,未评估过GCA的亲本材料,先评估其GCA比评估亲本间的SCA更重要。
Camellia oleifera is a kind of important oil tree for food and is cultivated for more than 2300 years in China. With the development of the C.oleifera industry in recent years, the new improved varieties with higher yield and better quality were demanded. Cross breeding by the superior clones is the main method to culture the new varieties with higher yield and better resistance. The genetic parameters of C. oleifera parents were estimated by analyzing（2＋0）-year-old F1 descendants for tree height, ground diameter and crown width in order to select optimum parents for the cross breeding. The results showed that the genetic difference were extremely significant in tree height, ground diameter and crown width among families. The families 40×95, 10×40 were better on the height, ground diameter and crown width. And the differences of general combining ability（GCA）, specific combining ability（SCA） and reciprocal effects（REC） were extremely significant on height and crown width too. The differences of GCA and REC were extremely significant but that of SCA was not significant on ground diameter. The GCA of Changlin 40 on height, ground diameter and crown width are the biggest, and have the significant difference with the other clones at 0.05 level. The GCA of Changlin 53 on height, ground diameter and crown width are the lowest, and which is accord with the traits of Changlin 53. Additive effects played a more major role and dominance was next for height, ground diameter and crown width. The heritability of these three growth traits were very low and the environment effects was bigger. The broad-sense heritability was between 14.91% ~ 20.62%, and the narrow-sense heritability was between 9.55% ~ 14.14%. The statistical analysis showed that GCA of Changlin 40# and 95# was positive and larger for height, ground diameter and crown width, and they will be better parents in cross breeding. Five cross combinations are superior according the effects of GCA and SCA, which F1 descendants got 5.76% ~ 45.62% genetic gain on height and 7.68% ~ 127.10% genetic gain on crown width, respectively. In a word, evaluations of GCA is more important than that of SCA before the GCA is evaluated on height, ground diameter and crown width of C.oleifera.