杂交组合灰色评判在玉米高产育种中的应用

Hybrid Combinations Grey System Application in High Yield Breeding of Maize

为合理评价玉米杂交组合的优劣,本文运用灰色系统理论和方法,对20个玉米杂交组合进行灰色评判。结果表明:以高产为育种目标时,可以将组合分成3个级别,15(丹1324×易7-2)、14(丹1324×易7-2)、3(S0073×丹340)、18(S0073×5003)、8(易7-2×S0073)、13(5003×S0073)、11(易7-2×丹1324)这7个组合综合性状表现优秀,被评为一级组合;2(丹340×S0073)、5(5003×丹340)、12(S0073×丹1324)、6(5003×易7-2)等6个组合表现良好,被评为二级组合;其余7个组合表现一般,为三级组合。根据计算出的结果,应区别对待3个组合,应在下年扩大种植一级组合,重点培养,在二级组合中甄选单株,三级组合没有育种价值应淘汰。

In order to evaluate the hybrid combination of maize reasonably,in this paper,the grey system theory and method were used to evaluate 20 maize hybrid combinations.The results showed that when high yield was the breeding goal,the combination could be divided into three levels,for breeding objectives,high yield divided into 3,15(Dan 1324×Yi 7-2),14(Dan 1324×Yi 7-2),3(S0073×Dan 340),18(S0073×5003),8(Yi 7-2×S0073),13(5003×S0073),11(Yi 7-2×Dan 1324)this seven combination comprehensive characteristic,was named grade 1 combination;2(Dan 340×S0073),5(5003 Dan×340),12(S0073×Dan1324),6(5003×Yi 7-2),7(Dan 340×Dan 1324),19(Yi 7-2×Dan 340)6 combination to perform well,was rated grade 2 combination;The rest of the seven combination to behave,a category three combination commonly.According to the results calculated,should differentiate between the three combination,should expand next year combined,cultivate planting level in the secondary portfolio selection,plant,the three combination no breeding value should be eliminated.