黔西北山区旱坡地玉米主要性状研究

以1998－1999年毕节地区杂交玉米坡地组区试结果为材料，采用灰色关联度分析方法，研究了19个主要性状与玉米产量的关系。结果表明：黔西北山区旱坡地玉米的理想性状是生育期适中，全生育期130－150d，营养生长期相对较长，抽雄叶丝期短，灌浆速度快；果穗粗；粒大而深，千粒重高，硬粒或半硬粒，果穗较长，轴细，行粒数较多，秃尖小；株高、穗位适中，株型紧凑，茎秆粗壮坚韧，抗倒伏，抗纹枯病、丝黑穗病，抗大、小斑病和青枯病。

A Study on Main Characters of Maize on the Sloping Fields in the Northwest of Guizhou Province

The relationship of 19 main characters with yield of maize was studied by using the grey connected degree analysis. The data came from the maize hybrid test on sloping fields from 1998 to 1999 in Bijie. The results showed that the ideal maize characters in this area are moderate growing period, about 130-150 d, the relatively longger vegetative growth period, short filling period, short heading period, big and long ear, big and deep seeds, high thousand kernel weight, hard or semihard seed, thin spike stalk, more seed number in a row, good fertility at spike tip, and moderate plant height and ear height. Plant type should be compact, with raw stalk resistant to lodging and having resistance to banded sclerotial blight, head smut, leaf blight, leaf spot and stalk rot.