摘要
Taking 65 cherry tomato core germplasms as experimental materials,the genetic diversity of seven agronomic traits were analyzed.The correlation between any two of the seven agronomic traits and the genetic relationships of these germplasms were analyzed based on genotypic values.The genetic diversity indices of the seven agronomic traits were 4.15,4.13,4.16,4.13,4.13,4.13 and 4.01,respectively,showing that the cherry tomato core collection had abundant genetic diversity.The correlation analysis between traits based on genotype effect values showed that leaf length was significantly correlated with leaf width with the correlation coefficient of 0.56.The fruit width was significantly correlated with fruit length with the correlation coefficient of 0.52.The flesh thickness was significantly correlated with fruit length and fruit width with the correlation coefficients of 0.49 and 0.39,respectively.The single fruit weight was significantly correlated with fruit length,fruit width and flesh thickness with the correlation coefficients of 0.44,0.61 and 0.62,respectively.When the genetic distances between core germplasms of cherry tomato were calculated based on the phenotypic values,65 core germplasms of cherry tomato were divided into three groups with the rescaled distance of 10.When the genetic distances between core germplasms of cherry tomato were calculated based on the genotypic values,the 65 core germplasms of cherry tomato were divided into four groups with the rescaled distance of 10.Comparing the 2 clustering results,it could find that genotypic value-based clustering analysis could better clarify the genetic relationship between core germplasms.This study could provide a theoretical basis for the effective utilization of cherry tomato core germplasms.
Taking 65 cherry tomato core germplasms as experimental materials, the genetic diversity of seven agronomic traits were analyzed. The correlation between any two of the seven agronomic traits and the genetic relationships of these germplasms were analyzed based on genotypic values. The genetic diversity indices of the seven agronomic traits were 4.15, 4.13, 4.16, 4.13, 4.13, 4.13 and 4.01, respectively, showing that the cherry tomato core collection had abundant genetic diversity. The correlation analysis between traits based on genotype effect values showed that leaf length was significantly correlated with leaf width with the correlation coefficient of 0.56. The fruit width was significantly correlated with fruit length with the correlation coefficient of 0.52. The flesh thickness was significantly correlated with fruit length and fruit width with the correlation coefficients of 0.49 and 0.39, respectively. The single fruit weight was significantly correlated with fruit length, fruit width and flesh thickness with the correlation coefficients of 0.44, 0.61 and 0.62, respectively. When the genetic distances between core germplasms of cherry tomato were calculated based on the phenotypic values, 65 core germplasms of cherry tomato were divided into three groups with the rescaled distance of 10. When the genetic distances between core germplasms of cherry tomato were calculated based on the genotypic values, the 65 core germplasms of cherry tomato were divided into four groups with the rescaled distance of 10. Comparing the 2 clustering results, it could find that genotypic value-based clustering analysis could better clarify the genetic relationship between core germplasms. This study could provide a theoretical basis for the effective utilization of cherry tomato core germplasms.
基金
Supported by Hainan Provincial Science and Technology Project(ZDYF2018035)
