Comprehensive evaluation of agronomic traits of pod pepper based on various analysis methods

WANG Hong; ZHENG Mingyan; JIA Maomao; LI Jinling; MA Yu; YANG Yuhua; GAO Xiaofeng; YUAN Chaozheng; ZHOU Xiaojing

doi:10.16861/j.cnki.zggc.2024.0560

Abstract：In order to support for breeding high-yield and high-quality pepper varieties,the inner relationship between main agronomic traits and the yield of different pepper varieties was explored.Taking 34 pepper varieties as materials,10 agronomic characters were comprehensively evaluated by correlation analysis,multiple regression analysis,path analysis and principal component analysis.The results showed that the maximum coefficient of variation of fruit number per plant was 30.00％.Plant height and plant spread were positively correlated with the total mass of dried fruit per plant.The dry mass of single fruit and the number of effective branches were positively correlated with the total mass of dried fruit per plant.Path analysis and regression analysis indicated that the number of fruits per plant,the dry mass of single fruit,the transverse diameter of fruit,the longitudinal diameter of fruit and the number of effective branches were the main factors affecting the total quality of dried fruit per plant.The main agronomic characters of pod pepper could be shorten to three principal components by principal component analysis and factor analysis,including yield character factor,fruit shape fac-tor and plant height factor,and their contribution rate was 39.979％,26.783％and 13.439％,respectively.The cumulative contribution rate of the three principal components was 80.201％.In summary,for breeding pepper varieties,we should fo-cus on improving plant height,the number of fruits per plant,the dry mass of single fruit,the transverse diameter of fruit,the longitudinal diameter of fruit and the number of effective branches.