The Diversity Analysis of Blade Color of Genus Pyrus in China
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.