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对黄早四及其31个衍生自交系的株高、穗位高、茎粗、雄穗长度、雄穗分枝数、叶向值6个株型相关性状进行因子分析和性状比较,研究黄早四及其衍生自交系的性状对植株株型和长势贡献率的大小及差异。结果表明:主成分1中,株高、茎粗、雄穗长度对植株生长势贡献较大,相对于黄早四,衍生系株高和雄穗长度普遍增加,而茎粗则有所下降;主成分2中,叶向值、雄穗分枝数和穗位高对株型贡献较大,相对于黄早四,各衍生系的叶向值、雄穗分枝数、穗位高普遍较低;株高、雄穗长度、雄穗分枝数和穗位高的最大值均出现在黄早四的基因型占50%的衍生自交系中。
The factor analysis and trait comparison of six plant type traits in Huangzao 4 and its 31 derived from inbred lines were carried out. The Size and Difference of Contribution Rate of Plant Variety and Growth of Plant Traits between Huangzao-Si and Its Derived Inbred Lines. The results showed that plant height, stem diameter and tassel length contributed significantly to the plant growth potential. The height and tassel length of derivative lines generally increased but the stem diameter decreased compared with Huangzao 4. In component 2, leaf orientation value, branch number and ear height contributed a lot to the plant type. Compared with Huangzao 4, the leaf orientation value, branch number and ear height of each derivative were generally lower ; The maximum of plant height, tassel length, tassel branch number and panicle height were all present in the inbred lines in which 50% of the genotypes in Huangzao 4 were derived.