摘要
研究了转Bt基因抗虫常规棉GK19和抗虫杂交棉中棉所29的群体干物质积累及其增长量对产量及棉株器官建成的影响,结果表明:盛花前保持适宜干物质的增长量,盛花后促进群体干物质的积累有利于产量的提高。株高、LAI及营养器官干重大小决定于盛花前群体干物质积累量的高低。盛花前保持适宜的干物质积累量有利于促进群体果枝数、果节数、生殖器官干重的增加;盛花后促进群体干物质积累有利于群体生殖器官干重、总铃数、成铃率及铃重提高。因此,转基因抗虫棉花群体盛花前调节群体干物质保持适宜增长量,才能形成适宜的群体LAI、适宜株高、果枝数和总果节量,为高产建立合理的群体结构基础,在此基础上,保持盛花后整个结铃吐絮期有较高的干物质积累量是获得高产更高产的根本所在。
The study was undertaken on two Bacillus thuringiensis （Bt） transgenic cotton cultivars, one conventional （GK19） and the other a hybrid （CCRI 29）, during the 2001 and 2002 growing seasons at Jiangsu Provincial Key Lab. of Crop Genetics and Physiology, Yangzhou University, China. The objective of this study was to investigate the effects of population dry matter accumulation （DMW） on seed cotton yield and organ development in Bt cotton. The results indicated that the seed cotton yield was highest, when population DMW maintained optimum before peak flowering, increased after peak flowering. The DMW accumulation before peak flowering had significant positive correlation with the plant height, LAI and vegetative organs DMW, respectively. The population fruit-branches, fruit-nodes and reproductive dry weight were highest, respectively, when population DMW maintained at optimum value. The population reproductive organs,DMW, bolls, boll retention and boll weight bolstered when population DMW accumulation increased after peak flowering. These results suggest that the optimum population structure in LAI, plant height, fruit-branches and fruitnodes may be expected when the DMW before peak flowering was to maintain at reasonable range in the population, Based on the population, increasing dry matter accumulation from peak flowering to peak boll open was basis for higher yield.
出处
《棉花学报》
CSCD
北大核心
2007年第1期13-17,共5页
Cotton Science
基金
江苏省教育厅开放实验室基金(K04007)
江苏省三项工程基金(Sx044
Sx046)
关键词
BT抗虫棉
干物重
器官建成
transgenic bollworm resistant cotton
dry matter weight
organ development
