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通过对苏棉６号、泗棉３号、中棉１２号转基因抗虫棉杂交种与各自对照品种的生长发育特性研究表明，转基因抗虫棉杂交种棉苗生长快，植株较高，果枝较长，叶片大，营养生长较旺；果枝数和果节数多，现蕾强度低。除苏棉６号抗虫棉杂交种成铃强度较高外，泗棉３号及中棉１２的转基因抗虫棉杂交种相对较低，中上部成铃率低于对照。在产量上以苏棉６号抗虫棉杂交种极显著地高于对照，泗棉３号及中棉１２抗虫棉杂交种与对照相差不大。因此，转基因抗虫棉杂交种在生产上应用时，必须协调好前期的营养生长，促进后期养分向棉铃输送
Through the research on the growth and development characteristics of the hybrid cottons of the hybrid cottons of Sumian 6, Simian 3 and Zhongmian 12, and the control varieties, the cotton plants of transgenic hybrid cottons grew faster and had higher fruiting branches Long, large leaves, vegetative growth is more flourishing; number of fruiting branches and fruit nodes, budding intensity is low. In addition to the higher boll forming intensity of the hybrid cottons, the cotton hybrids of Simian 3 and Zhongmian 12 had relatively lower hybrids and the bolls of middle and upper part were lower than the control. In terms of yield, the hybrids of Sumian 6 was significantly higher than that of the control, and the hybrids of Simian 3 and Zhongmian 12 were not significantly different from the control. Therefore, the transgenic Bt cotton hybrids in the production of applications, we must coordinate the early vegetative growth, and promote late delivery of nutrients to cotton bolls