四川棉花育成品种产量结构分析

采用相关分析和通径分析，对四川10年来育成品种（组合）的单株铃数、单铃重、衣分与皮棉产量的关系进行了分析。其中常规棉各结构因素与皮棉产量均为极显著正相关，而杂交棉仅衣分达极显著正相关，表明杂交棉的产量潜力比常规棉大。在对皮棉产量比CK增产5％以上的常规棉和增产10％以上的杂交棉的分析中，铃重与皮棉产量均为负相关。表明常规棉和杂交棉高产潜力的进一步改良，重点应提高结铃数和衣分。

Analysis of Yield Components of Cotton Varieties Bred in Sichuan

The relationships among bolls/plant,weight/boll and lint percentage for llnt yield of hybrids and varieties in upland cotton bred last ten years in Sichuan Province are analyzed w1th path and correlative analysis. The results show that positive correlation among these characters with lint yield of varieties is significant separately. There is only one significant positive correlation between lint percentage and lint yield for hybrids. It proved that lint yield potential of hybrids is better than varieties. A negative correlation of weight/boll with llnt yield would be discovered when lint yields of hybrids were more 10%,or conventional varieties more 5% than check variety. The study shows that bolls/plant and lint percentage are both important to increase lint yield of hybrids and varleties.