Genetic diversity analysis of phenotypic traits among 275 chili pepper germplasm resources
To clarify the genetic diversity of chili germplasm resources collected by the Guizhou Chili Research Institute and explore the diversity levels of germplasm resources from different regions,a study was conducted on 275 chili germ-plasm resources from various domestic and international regions.The study analyzed 18 phenotypic traits,focusing on ge-netic diversity,correlation,principal component analysis,and cluster analysis.The results showed that the overall coeffi-cient of variation for the 275 samples ranged from 17.06％to 84.02％.Correlation analysis indicated that 40 pairs of phe-notypic traits had significant or extremely significant correlation.Principal component analysis revealed that seven princi-pal components collectively accounted for 76.41％of the variability.Cluster analysis classified the 275 resources into five groups.Except for a few chili germplasm resources,the five groups exhibited noticeable differences and complementari-ties in multiple traits.Additionally,there were distinct regional characteristics or unique phenotypic features among the different groups.The findings provide effective support for selecting superior parent materials for the breeding and im-provement of new chili varieties in Guizhou.
万方数据
维普
