灰色关联度分析法在玉米杂交组合筛选中的应用

The application of grey relevant analysis to bolt combination of glution-sweet corn breeding

采用灰色系统理论中关联度分析法 ,根据育种目标 ,模拟出“理想品种”中各性状参数和各个性状的不同权重系数 ,在筛选新组合时 ,对多个相关性状进行定量分析 ,减少人为因素对筛选的影响 ,提高选择的准确性和可靠性。对糯甜玉米杂交组合F1代的各主要性状进行定量综合分析 ,比较其灰色关联度 ,结果表明 ,组号为F133的杂交组合综合性状最好 (G1=0 .872 ) ,F113次之 (G1=0 .811 1) ,F119综合性状最差 (G1=0 .4 88 6 6 ) 。

The related degree analysis method was used for breeding according to the grey system theory.The'idea breed'was simulated out for each character parameter and each character different weightiness coefficient.When bolting new combination,quantitative analysis can be used to maltiple relative characters,decrease the effect of artificial factor to the bolting combination,increase accuracy and reliability of selection.The main characters of glutinous sweet corn F 1 hybrid were analysed quantitatiaely and comprehensively.As compared with their grey related degree the results showed that comprehensive character of F 133 is the best (G 1=0.872),F 113 is the second(G 1=0.8111),F 119 is the worst (G 1=,0.48866).The comprehensive evaluation results were basically conformable with growth of hybrid combination in the productive practise.