| 陈丽君1，刘明骞2，廖柏勇3，陈晓阳3.不同种源苦楝苗期生长性状变异研究[J].广东农业科学,2018,45(5):30-35 |
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不同种源苦楝苗期生长性状变异研究 |
| Growth traits from different provenances of Melia azedarach at seedling stage |
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| DOI：10.16768/j.issn.1004-874X.2018.05.006 |
| 中文关键词: 苦楝 苗期 生长性状 种源 |
| 英文关键词: Melia azedarach seedling stage growth traits provenance |
| 基金项目:广东省林业科技创新项目（2011KJCX002） |
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| 中文摘要: |
| 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。 |
| 英文摘要: |
| 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. |
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