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《Acta Prataculturae Sinica》 2010-05
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Genetic analysis and mapping with SSR markers of the brown midrib gene bmr-6in Sorghum bicolor

LI Jie-qin,WANG Li-hua,ZHAN Qiu-wen,FAN Jun-cheng (College of plant sicence and technology,Anhui Science and Technology University,Fengyang 233100,China)  
The mutants,which produced brown leaf midribs,reduced the content of lignin by 40% to 60% compared with normal varieties.This low lignin content largely promoted the rate of digestion in livestock.The F2 population was constructed from the hybrid of N592(bmr-6)and Sa(white midrib)to map the bmr-6 gene. The ratio of white and brown midribs was 3to 1in the F2 population.Therefore,the bmr-6 gene is a single recessive gene.Using 171 SSR markers and F2recessive population,one SSR(simple sequence repeats)marker (txp295)that linked with the bmr-6gene was detected and the genetic distance was 4.2cM.In addition,the bmr-6gene was mapped to the seventh linkage group of sorghum because the txp295 marker was located on this linkage group.
【Fund】: 科技部农业科技成果转化资金项目(No:2008GB2C300125);; 国家自然科学基金(No:31071470);; 安徽省“115”产业创新团队资助(No:皖人才办[2009]2号);; 国家科技支撑计划项目(No:2008BADB3B10);; 安徽省高校学科拔尖人才基金(No:教秘人[2005]79号);; 安徽科技学院稳定人才专项(No:ZRC2009236)资助
【CateGory Index】: S514
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