Test and Analysis on Combining Ability of Nine Super Sweet Corn Inbred Lines with Abroad Germplasm
Zheng Jin-rong · Yumi kexue · 2006
Nine super sweet corn inbred lines with abroad germplasm T1,T2,T3,M1,M2,M3,R1,R2,R3 were selected as tested lines,and original inbred lines B,C,D,6,D2 as testing ones in this examination.45 crosses were made by means of incomplete diallel method,and the genetic parameters of the groups and the combing ability of 10 traits,growth period,plant height,ear height,ear length,ear diameter,core diameter,baldhead length,rows per ear,kernels per row,single ear weight were tested and analyzed by means of NCⅡ design.The results showed that the general combining ability(GCA) appeared two kinds of effects,negative and positive,and the big differences among the inbred lines on a trait and on the different traits each line.During the breeding of sweet corn,not only for GCA of lines should be noted to select,but also for SCA of crosses.The heritabilities of growth period,plant height,ear length,single ear weight were higher.These 4 traits should be selected earlier,and baldhead length,ear diameter,core diameter should be selected in later generation.