摘要： 对转双价基因(Cry1Ac+CpTI)、转单价基因(Cry1Ac)抗虫棉以及常规棉3种基因型棉花光合产物生产和积累分配规律研究表明,3种基因型棉花光合速率峰值均出现在蕾期和花期,但峰值差异不显著。转基因棉花(单价和双价)花前光合产物积累量降低是生物学产量降低的主要原因;花后光合产物输出率提高是转基因棉花维持产量的主要因素。转基因棉花大量花后光合产物束缚在铃壳中导致转基因棉花铃重较低。在转基因棉花育种中,应加强花前光合产物积累量和花后光合产物棉铃有效利用率的选择。
关键词:
棉花,
外源基因,
光合性状,
遗传改良
Abstract: The genetic improvement and photosynthate characteristic of different genotypes of cottons were studied in 2001 and 2003. In this report,the fifteen cotton breeds were divided into three genotypes. The first was DGC(double gene cotton,transgenic CrylAc plus CpTI cotton),including SGK321,Zhongmian-41, Zhong-mian-45,ZGK193,ZGK204. The second was SGC(single gene cotton, transgenic Bt cotton),including Jinmian-26, Jinmian-31, J inmian-33,Zhongmian-32,Zhongmian-35. The last was common cotton (CC),including Jinmian-25, Jinmian-12,Zhongmian-35,Zhongmian-12,Zhongmian-23.The results showed that there were no great differences about max of photosynthesis (Pnmax) among three genotypes cottons. All of these Pnmax appeared in budding and flowering periods. The correlation of photosynthesis and yield of cotton was not visible. The main action of photosynthesis for yield of cotton was not directly. It affected biomass of cotton to yield. The distributive rate of accumulation on source and sink organs were different in three genotypes of cotton. The effective utilization ratio (EUR) of photosynthnate accumulated after anthesis(PAAA) was different in three genotypes of cotton, and CC was the biggest and SGC smallest. The influence to yield by photosynthnate accumulated before anthesis (PABA) was different in three genotypes of cotton, which was SGC>DGC>CC. The decreasing of biomass of SGC and DGC were mainly due to PABA decrease. The output rates of PAAA of SGC and DGC were higher than CC. But more PAAA was stored in the boll shell,which had important effect on increasing boll weight of SGC and DGC. It was suggested that we should pay attention to PABA and boll weight in SGC and DGC breeding selection.
Key words:
Cotton,
External gene,
Photosynthetic,
Genetic improvement
中图分类号:
赵海祯, 梁哲军, 齐宏立, 王玉香, 聂安全, 吴秀峰. 外源基因对棉花光合生产和分配的影响[J]. 华北农学报, 2005, 20(1): 41-45. doi: 10.3321/j.issn:1000-7091.2005.01.010.
ZHAO Hai-zhen, LIANG Zhe-jun, QI Hong-li, WANG Yu-xiang, NIE An-quan, WU Xiu-feng. Effects on Production and Distribution of Photosynthate of External Gene to Cottons[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2005, 20(1): 41-45. doi: 10.3321/j.issn:1000-7091.2005.01.010.