Genetic diversity on phenotypic traits of local Chinese yam germplasms in Fujian were evaluated for development and breeding of high-quality varieties.The 22 phenotypic traits on 33 Chinese yam varieties in Fujian were studied with diversity analysis,correlation analysis and cluster analysis.The results showed that the genetic diversity index of phenotypic traits of local yam resources ranged from 0.684 to 1.766.The phenotypic quantitative traits coefficient of variation ranged from 9.76％ to 46.62％,and the coefficient of tuber diameter variation was the largest,reaching 46.62％.Obvious differences and relatively rich genetic diversity of phenotypic traits were found in local Chinese yam resources.Correlation analysis showed that there are many characteristics of the same phenotype between the same yam base.Principal component analysis showed that the cumulative contribution rate of the first 5 principal components was 78.81％,which mainly reflected the yield of stem,leaf,flower and tuber in the upper part of the ground.According to the cluster analysis of phenotypic characteristics of 33 local yam resources in Fujian,Dioscorea spp.was classified into 4 categories.In terms of genetic distance,D.persimilis was the closest relative to D.polystachya,and the furthest distance from D.alata.The diversity of the germplasm collection of Chinese yams in Fujian Province were abundant.There were correlations among the growth of aboveground plant parts and the traits related to the tuber yield which could be used for production estimation.
维普
万方数据
