冀中南棉花新品种产量性状与品质性状的综合评价分析

Comprehensive Evaluation of Yield Characters and Quality Characters of New Cotton Varieties in Mid-south Area of Hebei

通过对冀中南种植棉花新品种进行产量品质性状的综合评价分析,结果表明在不同的生态环境条件下,供试棉花品种产量性状以单铃重的变异系数最大,纤维品质性状以马克隆值的变异系数最大。通径分析的结果表明,按照直接通径系数由高到低排序,产量构成因子中的衣分>单株铃数>单铃重>籽指,纤维品质性状中的整齐度指数>断裂比强度>马克隆值>伸长率>上半部平均长度。前3个主成分的累计方差贡献率达87.263%,基本反映供试棉花品种10个主要性状的绝大部分信息。

The yield characters and quality characters of several new cotton varieties in the mid -south area of Hebei province were comprehensively evaluated in this paper .In different ecological environments , the single-boll weight of tested cotton varieties had the biggest variation coefficient among yield characters , and micronaire value had the biggest variation coefficient among fiber quality characters .Path analysis indicated that the direct path coefficients of various characters had the flowering order ：lint percent-age〉number of bolls per plant〉single-boll weight〉seed index among yield components , and uniformity index〉fiber specific strength〉micronaire value〉elongation rate〉50%staple length among fiber quality characters .Principal component analysis indica-ted that the top three principal components contributed 87.263%of accumulated variance , basically reflecting the vast majority of in-formation of 10 main characters in tested cotton varieties .