苦楝不同种源叶片性状变异研究  

Variation of Leaf Morphological Characters of Melia azedarach from Different Provenances

作　　者：陈丽君[1] 刘明骞[2] 廖柏勇[3] 丁美美[3] 陈晓阳[3] 

机构地区：[1]华南农业大学试验中心、农事训练中心,广东广州510642 [2]华南农业大学华南农业博物馆筹建办公室,广东广州510642 [3]广东省森林植物种质创新与利用重点实验室,华南农业大学林学与风景园林学院,广东广州510642

出　　处：《西南林业大学学报（自然科学）》2016年第5期16-20,共5页Journal of Southwest Forestry University：Natural Sciences

基　　金：广东省林业科技创新项目(2011KJCX002)资助

摘　　要：对苦楝10个种源的叶片性状进行测定,分析不同种源叶片的遗传变异。结果表明：种源间6个叶片性状变异系数幅度为16.48%~41.26%,表明不同种源间叶片性状的变异明显;叶面积和叶柄长的种源重复力较高,达到70%以上,其他4个叶片性状也超过45%,说明苦楝叶片生长性状差异在一定程度上是受遗传控制的;对各种源建立叶面积方程,除广东兴宁种源外,其他种源方程相关系数均在0.70以上,说明模拟方程拟合效果较好;偏相关分析表明,叶片性状与纬度、海拔、年均温、年降水量、无霜期、年均日照均相关;株高与叶长/叶宽呈显著正相关,冠幅与叶面积呈显著负相关,与叶长/叶宽呈显著正相关;根据叶片的6个性状可将10个不同苦楝种源聚为2类。Leaf traits of 10 provenance resources were determined, and the genetic variations of leaf from dif- ferent provenances were analyzed. The results showed that variance coefficient of 6 leaf traits ranged from 16. 48% 41.26%, and significant difference of leaf traits existed from different provenances. There existed high heritability in footstalk length and leave area, reached more than 70%, the other four leaf traits reached more than 45%, the differ- ence of Melia azedarach leaf traits is controlled by genetic control to a certain degree. Their coefficients of the regres- sion equation were greater than 0. 70 except the provenance of Xingning, and there were significant correlation be- tween leaf traits and latitude, altitude, annual average temperature, annual rainfall, frost-free period, annual average sunshine, there was significant positive correlation between plant height and the ratio of leaf length/width. The crown breadth was negatively correlated with leaf area, positively correlated with the ratio of leaf length/width. Using the cluster analysis of 6 leaf characteristics of Melia azedarach, 10 provenances can be divided into 2 types.

关 键 词：苦楝 种源 叶片性状 遗传变异 

分 类 号：S722.5[农业科学—林木遗传育种]