【摘要】 利用从CIMMYT引进和自育的10个热带、亚热带玉米自交系,按GriffingD4模型进行双列杂交,组配成45个杂交组合。通过对这些双列杂交组合的产量进行一般配合力和特殊配合力效应分析,结果表明:10个热带自交系的一般配合力效应和特殊配合力效应都存在极显著差异;一般配合力效应值依次为CI23>619-130>DK7-6>CI18=CI15>CML161>DK7-8>CI41>双M9>CI45;特殊配合力方差依次为DK7-8>双M9>CML161>CI41>CI18>619-130>CI45>CI15>DK7-6>CI23;619-130既有较高的一般配合力效应,又有较大的特殊配合力方差,是比较理想的自交系;杂种优势最强的组合是CI23×619-130、CML161×619-130,说明利用"热带自交系×热带自交系"杂交模式能够筛选出具有较强杂种优势的玉米杂交新品种。更多还原

【Abstract】 In the study,ten tropical or sub-tropical maize inbred lines introduced from CIMMYT and developed by Guangxi were used for diallel crosses with Griffing D4 model and 45 maize cross combinations were produced.The general combining ability(GCA) and special combining ability(SCA) effect of yield of the 45 combinations were analyzed,and the results indicated that the GCA and SCA effects of ten inbred lines were highly significant,and the order of GCA effect value of the inbred lines was CI23>619-130>DK7-6>CI18=CI15>CML161>DK7-8>CI41>ShuangM9>CI45;the variance order of SCA of inbred lines was DK7-8>ShuangM9>CML161>CI41>CI18>619-130>CI45>CI15>DK7-6>CI23.Moreover,619-130 is an ideal inbred line with higher GCA effect and bigger SCA variance,while CI23×619-130 and CML161×619-130 are the combinations with strongest heterosis.The study showed that new maize hybrids with stronger heterosis could be selected using the model of "tropical inbred lines cross with tropical inbred lines".更多还原