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转基因抗虫棉品系“３１０”在棉铃发育过程中，表现了较强的“源”生理优势。但在棉铃发育中、后期，营养物质向纤维输送速度降低，部分营养物质被束缚在棉铃对位叶和铃壳中，抗虫棉３１０单铃铃壳重高于常规棉“泗棉３号”，１９９７年和１９９８年３１０单铃铃壳干重最大值分别为１６９ ｇ 和１４５ ｇ，泗棉３号则分别为１４２ ｇ 和１４３ ｇ。抗虫棉３１０单铃纤维干重低于常规棉泗棉３号，３１０两年分别为２１０ ｇ 和１５９ ｇ，泗棉３号则分别为２２３ ｇ 和１６８ ｇ。转基因抗虫棉３１０光合产物积累多，但运转速度慢是其铃重减轻的重要生理基础。
Transgenic insect-resistant cotton line “310” showed strong “source” physiological advantage during boll development. However, during the development of cotton bolls, the transport rate of nutrients to the fiber decreased, and some nutrients were bound in the leaves and the shell of the bolls. The single boll shell of the insect-resistant cotton 310 was heavier than that of the conventional cotton “Simian 3”, 1997 In the year and 1998, the maximum dry weight of single ring bell shell was 169 g and 145 g respectively, while that of Simian 3 was 142 g and 143 g respectively. The dry weight of 310 single boll fiber of insect-resistant cotton was lower than that of conventional cotton Simian 3, 310 and 159 g respectively in two years and 223 g and 168 g respectively in Simian 3. Transgenic insect-resistant cotton 310 accumulated more photosynthetic products, but its slow running speed was an important physiological basis for its boll weight reduction.