研究了 5个在 F1代表现高优势的陆地棉品种间杂种的 F2 代的优势表现 ,并对 F2 代及其亲本的主要经济性状进行了通径分析。结果表明 ,F2 代杂种优势与 F1代中亲和竞争优势有明显正相关 ;单株铃数对 F2 和亲本的皮棉产量贡献最大 ,衣指、铃重对 F2 代皮棉产量有较大正效应 ,而衣分对亲本皮棉产量有较大正效应。因此 ,在选育 F2 代杂交种时 ,不仅依据 F1代中亲优势和竞争优势 ,还要考虑衣指和铃重的选择 The F2 generation performance of 5 intergeneric hybrids of Upland cotton cultivars with high current F1 performance was studied. The main economic traits of F2 generation and its parents were analyzed. The results showed that F2 progeny showed a positive correlation with the pro-competitive advantage in F1 progeny. Boll number per plant had the largest contribution to lint yield of F2 and its parent, The lint fraction had a greater positive effect on the lint yield of the parents. Therefore, when breeding F2 hybrids, not only based on the pro-dominant and competitive advantages of F1 generation, but also the choice of the index finger and boll weight