Analysis of phenotypic genetic diversity of eggplant germplasm resource

XIE Xinxin; HUANG Jiandu; LIN Hefei; CHEN Yujing; CHEN Jibing

doi:10.16861/j.cnki.zggc.2024.0514

Abstract：To explore the genetic diversity and genetic relationships between eggplant germplasm resources from different sources,30 eggplant germplasm resources were introduced in this study,the genetic diversity of 16 main morphological traits,such as fruit shape,fruit color and fruit mass,were analyzed by multivariate statistical analysis,principal compo-nent analysis,correlation analysis and cluster analysis.The results showed that the Shannon-Wiener diversity index of 11 quality traits of 30 eggplant germplasm resources ranged from 0.24 to 1.36,the variation coefficient ranged from 15.73％to 46.86％.The coefficient of variation of the five quantitative traits ranged from 9.86％to 19.89％,with an average of 14.80％,and the Shannon-Wiener diversity index ranged from 1.68 to 1.96,with an average of 1.86.The correlation analy-sis of 16 phenotypic traits of 30 eggplant germplasm resources showed that 12 pairs of traits are extremely significant pos-itive correlation and 5 pairs of traits were extremely significant negative correlation.The eigenvalue of the top five princi-pal components extracted by principal component analysis were all above 1.0,and the cumulative contribution rate of the five components was 80.86％,which could basically reflect most of the information of all indicators.The cluster analysis showed that the 30 eggplant germplasm resources were classified into four categories at the euclidean distance 17.5.The results laid a foundation for improving the utilization efficiency of eggplant germplasm resource.