几个自选玉米自交系配合力及遗传参数分析

Analysis on Combining Ability and Genetic Parameter in Several Optional Maize Inbred Lines

用11个自选玉米自交系按不完全双列杂交组配成28个杂交组合,对其玉米籽粒产量等9个数量性状不同杂交模式的杂种优势和配合力差异进行了分析。结果表明,自交系忻831、忻662、忻923、忻915的利用价值较高,可能成为组配强优势杂交组合的优良玉米自交系;出籽率、行粒数可以早代选择;株高、穗位高、穗长、穗粗、穗行数、产量、秃尖不宜早代选择。

We selected 11 maize inbred lines by incomplete diallel cross and made them into 28 hybrid combinations and analyzed grain yield,heterosis and combining ability of 9 agronomic traits of different crossing model.The results show that： inbred lines of Xin 831,Xin 662,Xin 923 and Xin 915 have higher value in use and they might be the group with strong heterosis combination of maize inbred lines.The results also show that seed yield rate and grain numbers on per row can be early selected when maize is in early generation;However,plant height,ear height,ear length,ear diameter,row numbers of per ear,yield and removal tip are not availbe to be selected in their early growth.