Analysis of phenotypic trait variation characteristics of Morus nigra L.germplasm resources
[Objective]The phenotypic traits of 710 M.nigra L.germplasm resources from 21 collection sites in southeast Xinjiang through the genetic diversity and cluster analysis in the hope of laying the foundation for the systematic research,development and utilization of M.nigra.germplasm resources in Xinjiang.[Meth-ods]The genetic diversity,principal components,clustering and correlation analysis of 15 qualitative and 12 quantitative description characteristics of M.nigra.were carried out.[Results]The diversity of qualitative de-scription characters of 710 black mulberry germplasm resources was low;The diversity of four personality char-acters(leaf size,branch circumference,leaf width and leaf shape)was relatively rich,while the diversity of other quantitative traits was low;The clustering results of phenotypic traits of M.nigra.were mainly concen-trated in two groups.According to the distribution of administrative regions,one group was mainly concentrated in the southern margin of the Tarim Basin,and the other group was mainly concentrated in the northern margin of the Tarim Basin;There was a significant negative correlation between fruit shape index and latitude,while there was no correlation between other quantitative characters and geographical factors(longitude,latitude and altitude);The differences of leaf size and leaf circumference were the main characteristics to distinguish the varieties of M.nigra.varieties from different regions;In addition,the leaf size and perimeter were positively regulated by temperature and negatively regulated by rainfall.[Conclusion]The genetic diversity of phenotyp-ic characteristics of black mulberry is low.
Morus nigra L.phenotypic charactersgermplasm resourcegenetic diversitycluster analy-sis
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