Analysis of Main Traits Combining Ability and Application Potential of 10 Maize DH Lines
With three tester lines and ten freshly chosen DH lines-Yunrui408 serving as the control,an NCⅡgenetic mating design was used to generate thirty hybrid pairings.The combining ability and heterosis of 7 yield traits were analyzed,and heterotic groups were classified based on specific combining ability(SCA)for yield.The newly chosen DH lines'ear traits of DHYML6-12,DH18SCX,and YBQ11 all demonstrated positive general com-bining ability(GCA)effects,according to combining ability analysis.The single-plant yield GCA effects ranked among the top three,suggesting their high breeding potential.Preliminary classifications of the Reid group included DH18SCX,DHYML6-12,and YBQ11;the Non-Reid group included DHYML023,X5,and YML3249;and the Su-wan1 group included DHTML862,YML3924,YML3972,and YML7939.These classifications were based on the yield SCA effects.Strong heterosis was seen in the combinations that were created by combining the recently chosen DH lines with tester lines in accordance with the"TriHG"heterosis paradigm.
MaizeDH lineCombining abilityRelative heterosisHeterotic group
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