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在棉铃发育过程中 ,转基因抗虫杂交棉1 0 2增产的主要原因为铃重提高。单铃籽棉重的提高是纤维和种子的同步增加 ,一是纤维干重的提高 ,1 997～ 1 998两年平均转基因抗虫杂交棉单铃纤维干重最大值为 2 .2 2 g,比常规棉 1 .90 g增加 1 6.84%;二是种子干重的增加 ,两年平均杂交棉单铃种子重为 2 .53g比常规棉 2 .2 3g增加1 3.45%。转基因抗虫杂交棉在棉铃发育过程中表现较强的“源”“库”生理优势 ,即棉铃对位叶叶面积、干物质 ,铃壳干重、铃壳内全 N含量均高于常规棉 ,且达到最大值后下降速度快。转基因抗虫杂交棉光合产物积累多 ,营养物质运转快 ,实现了“源”“库”“流”三者协调同步 ,这是杂交棉铃重提高的重要生理基础
During boll development, the main reason for the increase of yield of transgenic insect-resistant hybrid cotton was increased boll weight. Single boll seed cotton weight increase is the simultaneous increase of fiber and seed, first, increase the dry weight of fiber, 1 997 ~ 1 988 two years average transgenic insect-resistant cotton single bell fiber dry weight maximum 2.22 g, than The conventional cotton 1.90 g increased by 1 6.84%; the second is the increase of seed dry weight, two-year average single hybrid cotton boll weight of 2.53g than the conventional cotton 2.23g increased by 1 3.45%. Transgenic insect-resistant hybrid cotton showed strong “source” and “sink” physiological benefits during cotton boll development, ie, leaf area, dry matter, dry weight of boll shell, total N content in boll shell, , And after reaching the maximum rate of decline faster. Transgenic insect-resistant hybrid cotton accumulated more photosynthetic products and had faster nutrient operation, achieving the synchronization of “source”, “sink” and “flow”, which was an important physiological basis for the increase of cotton boll weight