古槐树叶片主要性状多样性分析

为有效评价和鉴定古槐树资源、挖掘其优良性状,以2011年收集的山东省临沂、烟台、枣庄、淄博四地市72份古槐树种质为试验材料,对叶片的11个表型性状进行变异系数统计、单因素方差分析、相关性分析、主成分分析和聚类分析等研究。结果显示:72份古槐树种质11个表型性状的变异系数为11.88%~39.10%,平均变异系数为23.26%,具有较丰富的遗传多样性;11个性状有一定的相关性,叶宽与叶面积间的相关性系数为0.884,叶长与叶周长的相关性系数为0.832,叶面积与鲜质量的相关性系数为0.825;11个性状可以综合为4个主成分,累计贡献率达75.70%;对72份古槐树种质进行聚类分析,取阀值22.5时可分为3大类。本研究结果为古槐树种质资源保护及创新利用提供理论依据和技术支持。

Phenotypic Diversity of Leaflet Bladesof Old Sophora japonica Trees

Scions were collected from 72 old Sophora japonica trees in Linye, Yantai, Zaozhuang and Zhibo of Shandong province in the spring of 2011. They were grafted on 1-year seedlings by the end of April and planted in 2012. Leaflet blades of planted trees were collected for determination of leaflet traits. The result demonstrated that variation coefficient of 11 phenotypic traits ranged from 11.88% to 39.10% and the average variation coefficient was 23.26%.The correlation coefficients between leaflet width and area, leaf length and perimeter,leaf area and fresh weight were 0.884, 0.832 and 0.825 respectively.Principal component analysis indicated that four leaf principle components(leaf area, rachises,shape index and dry weight) had the cumulative contribution rate of 75.70%.72 germplasms could be divided into 3 groups at 22.5 by cluster analysis.