梨属植物叶片色泽多样性分析

The Diversity Analysis of Blade Color of Genus Pyrus in China

以我国梨属(Pyrus)主要植物种以及近缘属植物榅桲(Cydonia oblonga)为试材,对叶片叶绿素含量,色差值L、a、b等色泽指标进行了测定,并计算出色度角(H)、色泽比(h)、色彩饱和度(C)等综合色度指标参数,采用聚类分析及主成分分析方法对叶片色泽指标参数进行了统计分析。结果显示:在果树作物中,梨属植物秋季叶片色泽丰富,与近缘属植物叶色差异明显,依据叶色指标参数能够将梨属植物划分为不同类别,叶色聚类划分结果与自然分类结果基本吻合,亲缘关系近的种群聚合在一起;另外,对梨的种间杂种和一些难以分类的种类能够得到合理的解释。以上结果说明,梨属植物叶片色泽能够做为一项重要的分类参考指标,研究的结果可为今后梨属植物优异种质资源开发利用和分类研究提供参考依据。

The important genotypes of the genus Pyrus and its allied common quince（Cydonia oblongs） were used as materials.The blade chlorophyll content,the color value L,a,and b were determined using colorimeter and chlorophyll meter.The color parameters H,h,and C were calculated.The correlation and clustering analysis were carried out based on these data.The results showed that there was significant difference in blade color parameters between genus Pyrus and its allied genera,the genus Pyrus conld be divided into different categories on the basis of blade color parameters,the clustering analysis results were basically consistent with the natural classification.The close population of genetic relationship was divided into together.In addition,interspecific hybrid and the types of difficul classification were able to get a reasonable explanation.The results showed that the blade color parameters in the genus Pyrus might be a suitable index to assess the classification of the genus Pyrus.The investigation could provide a reference for the future taxonomy of the genus Pyrus and the utilization of germplasm resources.