"金皇后"等八个玉米群体产量配合力分析

通过8个玉米群体双列杂交分析,研究其产量配合力及杂种优势.产量方差分析结果表明,基因型之间差异极显著.产量的一般配合力和特殊配合力差异均极显著.群体豫综5号、黄墨49、金皇后、二南24群和自T36具有较高的一般配合力和较大的特殊配合力方差.群体黄墨49产量的一般配合力效应值最高.金皇后的一般配合力效应值在8个群体中处于中等水平.BSSS和Lancaster群的一般配合力效应值偏低.金皇后×黄墨49产量最高.BSSS×自T36中亲优势最高.根据群体产量的配合力和杂种优势分析,初步筛选出豫综5号×自T36、豫综5号×二南24、金皇后×黄墨49和金皇后×自T36四个潜在的杂优组合模式。

Analysis of Combining Ability and Heterosis Among 8 Maize Populations Including "Goldqueen"

Eight maize populations were crossed in a diallel mating system.The combining ability and heterosis of the parents and 28 combinations were evaluated for grain yield.Highly significant difference was observed among the different genotypes for yield.Furthermore,General combining(GCA)and special combining (SCA)were highly significant for grain yield.The GCA and variance of SCA of Yuzong No.5,Huangmo49, Goldqueen,Ernan24,and ZiT36,were higher than the other populations.It was the highest value of GCA of Yuzong No.5 for grain yield and the lowest value of Lancaster,an unimproved population.The GCA value of population of Glodqueen,a native variety,was the middle rank among 8 populations for grain yield.The highest-yidding combination was Yuzong No.5×ZiT36,but the highest mid-parent heterosis combination was BSSS×ZiT36.According to the performance of its combining ability and heterosis,4 heterotic patterns were suggested.