Analysis of trait variation and their correlationships in purple-orange Chinese cabbage inbred lines
BAO Yongrong
MA Shigeng
MAO Mengting
GONG Ying
ZHANG Lugang
NIE Shanshan
Abstract：In order to promote the development of purple-orange Chinese cabbage and provide reference for variety breed-ing and germplasm resource innovation of purple-orange Chinese cabbage,the 35 horticulture traits of 34 purple-orange Chinese cabbage samples were investigated on phenotypic identification of horticultural traits,genetic variation,correla-tion analysis,and SSR genetic diversity analysis.The consistency between the clustering results of the phenotypic traits and principal components,as well as molecular was compared.The results are as follows:The coefficient of variation of 19 quantitative traits ranged from 11.21％to 81.03％,with the highest coefficient of variation observed in the longitudinal diameter of leafy head,indicating a significant breeding potential for leafy head height;The coefficient of variation for 16 quality traits ranges from 0 to 56.30％,with the highest coefficient of variation for cotyledon color,followed by outer leaf color.Meanwhile,the coefficients of variation for leaf margin curvature,glossiness,midrib color,leaf vein freshness,and leaf vein purple at the seedling stage were all greater than 34％,indicating that the pure lines had high potential for appear-ance improvement.Relevant analysis showed that the leaf head height,leaf head width,length of the biggest outer leaf,width of the biggest outer leaf,length of shorted stem,the length of the middle rib and the number of outer leaves are the main related traits affecting plant gross mass and head mass.At the same time,the number of heading leaves have a signif-icant impact on head mass.Cluster analysis showed that the results of phenotypic trait clustering were 55.9％consistent with principal component clustering,and the results of phenotypic trait clustering and SSR molecular marker clustering were hardly consistent.Therefore,phenotypic variation and SSR markers should be considered in the identification and evaluation of crop germplasm resources.
Keywords：Purple-orange Chinese cabbageAgronomic characterSSR molecular markerPrincipal component analysis
Publication Date：2025-08-05
Online Publishing Date：2025-09-01(First online date of this platform, not the publication date of the document)
Pages：15( 52-66 )