Comprehensive evaluation of open field large fruit tomato hybrid combinations based on principal component and membership function analysis
In order to improve the efficiency of tomato hybrid combination breeding and screen for large fruit tomato hybrid combinations with excellent comprehensive traits suitable for open field cultivation in Ningxia region.62 hybrid combinations of open field large fruit tomatoes were used as materials,with two main varieties Fengshou 128(CK1)and Meifen 869(CK2)as controls.The data of 28 phenotypic traits were processed and analyzed using variation analysis and principal component analysis.A comprehensive evaluation was conducted on 62 hybrid combinations and control varieties.The results showed that among the 11 botanical traits,the variation coefficient of the leaf length was the smallest,at 7.73%,and the variation coefficient of sepal shape was the largest,at 46.74%.Among the 17 fruit traits,the variation coef-ficient of fruit shape index is the smallest,at 6.31%,and the variation coefficient of fruit cracking is the largest,at 43.38%.The cumulative variance contribution rate of the top 10 principal components extracted using principal compo-nent analysis is 73.31%,which includes most of the genetic information of the phenotypic traits in hybrid combinations.Based on the combination of principal component analysis and membership function method,a comprehensive evaluation was conducted on 62 tomato hybrid combinations.Four tomato hybrid combinations with higher comprehensive evalua-tion values than the two control varieties were selected as AF07,AF46,AF44 and AF55,with comprehensive evaluation values of 0.76,0.74,0.69,and 0.68,respectively.This study provides a theoretical basis for the breeding of large fruit to-mato varieties in the summer open field of Ningxia region.
万方数据
维普
