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为了更高效地进行杂交棉品种选育,利用2006~2015年近10 a的河北省棉花区域试验资料,采用相关分析和多元逐步回归分析的统计方法,对影响杂交棉产量的构成因素进行了分析。相关分析结果表明:4个产量构成因素中,皮棉产量与单铃重呈极显著的正相关,与衣分和单株铃数呈不显著的正相关,与子指呈不显著相关;多元线性回归、偏相关分析和通径分析结果表明,4个产量构成因素均对皮棉产量有一定意义,对皮棉产量的贡献度顺序为单铃重>衣分>单株铃数>子指。因此,在杂交棉品种选育时,应尽力提高杂交棉的单铃重,同时重视协调与衣分和单株铃数的相互关系,从而大大提高棉花的皮棉产量。
In order to select more hybrid cotton varieties more efficiently, using the regional cotton test data of Hebei Province in recent 10 years from 2006 to 2015 and the statistical methods of correlation analysis and multivariate stepwise regression analysis, the factors affecting the yield of hybrid cotton were analyzed . Correlation analysis showed that among the four yield components, lint yield and boll weight had a significant positive correlation with lint percentage and boll number per plant, but no significant correlation with lint percentage. Multiple linearity Regression analysis, partial correlation analysis and path analysis showed that all the four yield components had some significance on lint yield, and the order of contribution to lint yield was single boll weight> lint percentage> number of bolls> sub-finger. Therefore, when breeding hybrid cotton varieties, we should try our best to improve the single boll weight of hybrid cotton, and pay more attention to the coordination and the relationship between the number of bolls and the number of bolls, so as to greatly increase cotton lint yield.