不同居群塔里木沙拐枣(Calligonum roborowskii A. Los.)果实形态变异研究

应用方差分析、聚类分析、主成分分析、相关性分析等方法,对塔里木盆地分布的塔里木沙拐枣(Calligonum roborowskii A.Los.)5个居群的果实形态进行了形态差异分析。单因素方差分析显示果实长度、果实宽度、果实长宽/果实宽度比、刺毛长度、两肋间距、两刺间距、取刺毛后的瘦果长度、瘦果宽度、瘦果长度/瘦果宽度比与每果肋数等10个果实性状在不同居群间具有极显著差异;主成分分析显示两刺间距,两肋间距,刺毛长度等3个性状是造成各居群果实表型差异的主要指标;根据果实形态地理距离比较近的居群聚为一大支;相关性分析显示果实长度与果实宽度,海拔与刺毛长度极显著正相关。

Morphological Variations in Fruit Among Population of Calligonum roborowskii A. Los.

Eleven morphological attributes of fruit among five populations of Calligonum roborowskii A.Los. from Tarim basin of Xinjiang, China were compared by statistical analysis in the present study. One way ANOVA showed that there are significant difference in 10 morphological traits among populations; The five populations were incorporated into two types according to the results of clustering analysis (Euclidean distance). The principal component analysis result indicated that the distance of the between bristles, the distance of the between ribs and length of bristle were the main reasons leading to the morphological variations among populations. The correlation analysis showed that length of seed had a very significant correlation with diameter of seed and altitude had a very significant correlation with length of bristles.