10份CIMMYT玉米自交系的育种潜势分析

Analysis of Combining Ability on 10 CIMMYT Maize Inbred Lines

[目的]探明10份CIMMYT玉米自交系在农艺、产量性状方面的配合力,为绵阳骨干自交系的改良与玉米杂交种选育提供指导。[方法]以绵阳农科院自育系绵714、绵723及外引系18599为测验种,采用NCⅡ遗传交配设计配制30个杂交组合,对10份CIMMYT玉米自交系的配合力进行分析。[结果]10份CIMMYT玉米自交系中,CML522、CLYN492具有较高的单株产量一般配合力,其效应值分别为8.3135、4.8319。CML522、CLYN492与18599、绵723组配也表现出较好的特殊配合力,其中18599×CLYN492的产量水平超过对照11.34%,绵723×CML522的产量水平超过对照5.19%。[结论]CIMMYT玉米自交系CML522、CLYN492在产量性状方面表现出较好的一般配合力,具有较好的育种利用潜力,可作为未来高产杂交种的选配模式。

[Objective]To explore the combining ability of 10 CIMMYT inbred lines for application on maize breeding.[Method]MIAN714,MIAN723,18599 were chose for tester which crossed with 10 CIMMYT inbred lines to used with incomplete diallel cross design.[Result]CML522 and CLYN492 showed better yield GCA,the GCA from CML522 and CLYN492 were 8.3135 and 4.8319,respectively.CLYN492 crossing 18599 had high SCA,the yield of 18599×CLYN492 increased by 11.3%comparing with CK,CML522 crossing MIAN723 had high SCA,the yield of MIAN723×CLYN492 increased by 5.19%compared with CK.[Conclusion]The lines of CML522 and CLYN492 with high GCA had good breeding potentiality,which could be used as the matching pattern for high-yield coeno-species in future.