Genetic diversity analysis of phenotypic traits in 115 facility tomatoes
Germplasm resources are fundamental to the breeding of new varieties.In order to screen the tomato germplasm suitable for facility cultivation in Yunnan province,115 tomato germplasm materials were introduced,and their quality traits and quantitative traits were investigated.The genetic diversity and characteristics of germplasm resources were studied by principal component analysis,correlation analysis and cluster analysis.In this study,a total of nine highly susceptible tomato germplasm materials were screened out,and 86 resistant germplasm mate-rials were screened out from the remaining 106 germplasm ma-terials.The 106 tomato germplasm materials were creeping,and the fruit shape and color were relatively rich.There were three fruit types and seven fruit colors.There were 15 germplasm materials with high homogeneity,and 35 germplasm materials with no fruit cracking and medium fruit cracking.The variation of ventricular number,single fruit weight and first inflorescence segment of tomato germplasm was larger.The results of correlation analysis showed that plant height was significantly positively correlated with soluble solids content,total number of veraison,total number of fruit setting and total number of units,and significantly negatively correlated with single fruit weight and yield per plant.Stem diameter was significantly positively correlated with fruit number per inflorescence,soluble solids content,total number of veraison,total number of fruit setting and total number of units,and was significantly negative-ly correlated with single fruit weight and yield per plant.Through cluster analysis,tomato germplasm materials were divided into three groups and six subgroups.A total of 47 tomato germplasm materials with high average soluble solids content,average fruit number per inflorescence and average total fruit number were selected.There were 23 tomato germplasm materials with an average yield per plant greater than 5.00 kg,and nine tomato germplasm materials with an average single fruit weight greater than 200.00 g.The results showed that the higher the first inflorescence node of tomato,the less the total number of fruit setting.The larger the single fruit weight,the lower the soluble solids content,the higher the yield per plant,and the less the fruit number per inflorescence.Fruit transverse diameter,peduncle size,single fruit weight,fruit longitudinal diameter and pulp thickness could be used as the main fac-tors to evaluate the germplasm of tomato in the facility.
facility tomatoescoefficient of variationprincipal component analysiscorrelation analysiscluster analysis
万方数据
维普
