河北省杂交棉产量构成因素研究

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。

Research on Yield Components of the Hybrid Cotton in Hebei Province

In order to make hybrid cotton variety selection more efficiently, the study use the data from hybrid cotton variety regional test in Hebei Province in ten years of 2006-2015. Thirty eight spring hybrid cotton varieties passed the verification were selected to analysis main yield components affected the lint yield and by correlation analysis and stepwise multiple linear regressions analysis methods. The correlation results showed that the lint yield of cotton presented highly significant positive correlation with boll weight,and no significant positive correlation with boll number and lint percentage,and little correlation with seed index. The results of stepwise multiple linear regressions and partial correlative analysis indicated that all the yield components have certain significance to the lint yield. The boll weight had the biggest contribution to the lint yield, the lint percentage and boll number were the second, and the seed index was the smallest. We should pay attention to improve boll weight and attach great importance to coordinate the interaction between boll weight,the lint percentage and boll number to improve the lint yield.