河北省冀中南春播转基因抗虫棉花审定品种主要产量性状变化趋势分析

Analysis on Main Yield Characters of the Spring Sowing Transgenic Insect Resistant Cotton Varieties Used to Jizhongnan Released in Hebei Province

从1995年河北省棉花品种审定委员会开始受理转基因抗虫棉参试以来，共审定冀中南春播转基因抗虫棉品种35个，杂交种20个，本研究对审定品种的主要产量及相关性状进行了分析。分析结果表明：审定品种多集中在2006—2008年，常规品种霜前皮棉产量呈上升态势，杂交种产量呈先上升后稳定趋势，2002—2003参试年份之前衣分逐年得到明显提高，以杂交种最为明显，从37．6％上升到41．9％，之后逐步稳定在40％左右，常规种衣分也有明显提高，单铃重则延续了上升态势，变化幅度为4．9—6．5g，单株成铃变化较小。对比常规品种和杂交种表明，杂交种可以迅速改良产量，但到一定程度后，两者表现逐渐趋同。

Total 35 transgenic insect resistant cotton varieties and 20 transgenic insect resistant cotton hybrids were approved from 1995,when the Hebei Province cotton variety examination and approval committee began to allowed transgenic insect resistant cotton varieties in regional test for spring sowing cotton region of southen-central Hebei. On the analysis of the yield components,the results showed most varieties that approved from 2006 to 2008, the pre-frost lint cotton output of the conventional variety assumes increase tendency,and the hybrid output assumes increase first,then remain the stable tendency,the lint percentage obtains the distinct enhancement before 2002 - 2003 ,It is obvious by the hybrid,rised from 37.6% to 41.9% ,afterwards gradually stabilizes about 40% ,the lint percentage of convention varieties also have a distinct enhancement, per boll weight has continued the rise situation, the change scope is 4.9 - 6.5 g, the bells of per plants change small. Contrast with convention variety, the hybrid may improve the output rapidly,but reach a certain degree,both performance are gradually similar.