摘要
对10个种源苦楝苗期6个苗木生长性状进行了观测,分析不同种源性状间的遗传变异。结果表明:种源间在6个苗木生长性状上的变异系数为12.31%～68.11%,除通直度外,不同种源5个性状间的差异均达到了极显著水平,说明不同种源间的苗木生长性状的变异明显,苦楝种源选择具有较大的潜力,总体来看苦楝种源地理趋势不明显,表现出随机变异现象;不同种源苦楝种子及苗木生长性状间无显著相关性;除通直度外的其他5个生长性状的种源遗传力超过45%,说明苦楝种源苗木生长性状在一定程度上受遗传控制;种源株高和地径与采种点地理因子无显著相关性,地径与年降水量呈显著正相关关系,即随采种点降水的增多,地径有增大趋势;以株高为标准对苦楝种源进行筛选,初步选出梧州、南昌、兴宁、歙县4个优良种源。
In this study,6 growth traits of Melia azedarach seedlings from 10 provenances in China were measured,and the genetic variations of growth traits from different provenances were analyzed. The results showed that variance coefficient of growth traits ranged from 12.31%-68.11%,and there were highly significant differences among the 5 growth traits except the tree stem straightness,which indicated that the selection of provenances for Melia azedarac had great potential. As a whole,the geographic variation trend of growth traits was not obvious,with the random variation mode. There were no significant differences for seed and plant growth traits among different provenances. The heritability of the five growth traits apart from straightness was more than 45%,which indicated that the growth traits of M. azedarach were controlled by genetic factors to a certain degree. In addition,there was no significant correlation between the height and ground diameter of plants and geographic factors. However,there was significantly positive correlation between the ground diameter and annual precipitation. In this experiment,four superior provenances（Wuzhou,Nanchang,Xingning,Xinxian）were screened out according to plant height.
作者
陈丽君
刘明骞
廖柏勇
陈晓阳
CHEN Li-jun;LIU Ming-qian;LIAO Bo-yong;CHEN Xiao-yang(Experiment Station and Agriculture Training Center,South China Agricultural University,Guangzhou 510642,China;The Preparation Office of South China Agricultural Museum,South China Agricultural University,Guangzhou 510642,China;Guangdong Key Laboratory for Innovative Development and Utilization of Forest Plant Germplasm/College of Forestry and Landscape Architecture,South China Agricultural University,Guangzhou 510642,China)
出处
《广东农业科学》
CAS
2018年第5期30-35,共6页
Guangdong Agricultural Sciences
基金
广东省林业科技创新项目(2011KJCX002)
关键词
苦楝
苗期
生长性状
种源
Melia azedarach
seedling stage
growth traits
provenance
