DPC与DTA-6复配对转基因抗虫棉产量及品质的影响

 2004—2005年在河北吴桥试验站研究了缩节胺单独使用（DPC）与DTA-6 复配使用（DPC+）对转基因抗虫棉产量、产量构成因素和纤维品质的影响。结果表明，与对照相比，DPC与DPC+均可提高成铃数、铃重和皮棉产量，但DPC+增产效果更明显；两处理对转基因抗虫棉纤维主要品质指标影响不显著。

Effects of Mixture of DPC and DTA-6 on Yield, Yield Components and Lint Quality of Transgenic Bt Cotton

This experiment was conducted in Wuqiao experimental station (located in Hebei Province) of China Agricultural University from 2004 to 2005, to investigate the effects of single application of mepiquat chloride (DPC) or in mixture with DTA-6（DPC+）on the yield, yield components and lint quality in transgenic Bt cotton with Xinza 2 (XZ DPC2, hybrid Bt cotton) and Guokang 12 (GK 12, conventional Bt cotton).The results indicated that DPC increased the lint yield by 4.7% in 2004 and 12.1% in 2005,respectively, whereas DPC+ increased boll numbers and boll weight more than single application of DPC, and therefore resulted 14.5% higher lint yield areraged across varieties and years. Among lint quality parameters, only micronaire value was significantly but slightly increased by DPC (except for that of GK 12 in 2005). Taken together, DPC+ is more advantageous in increasing the yield of transgenic Bt cotton compared with DPC, which enables its practical application in current cotton production in China.