油菜素内酯代谢相关基因BAS1等位变异影响小麦籽粒密度及粒重表型  

Effect of Allelic Variation of BAS1 Involving in Metaboly of Brassinovide on the Grain Density and Weight of Common Wheat

作　　者：董连生[1] 潘艳秋[1] 赵秋霞[1] 常成[1] 张海萍[1] 司红起[1] 卢杰[1] 马传喜[1] 

机构地区：[1]农业部黄淮南部小麦生物学与遗传育种区域重点实验室,安徽农业大学农学院,合肥230036

出　　处：《分子植物育种》2012年第1期92-96,共5页Molecular Plant Breeding

基　　金：国家自然科学研究基金(31000705);现代农业产业技术体系建设专项资金;安徽省作物生物学重点实验室项目(10111406024)共同资助

摘　　要：BAS1(phy B activation-tagged suppressor1)是调控油菜素内酯活性的关键基因。本研究利用由和尚麦和豫麦8679杂交后代构建的RIL群体(包括129个家系),研究了BAS1和小麦千粒重、籽粒密度两个产量性状的关系。结果表明BAS1基因位点等位变异对千粒重和籽粒密度具有显著的影响,B型等位基因的家系其千粒重和籽粒密度均值均显著高于A型等位基因的家系。相关分析表明,BAS1位点等位变异分别与千粒重和籽粒密度呈显著(0.178*)和极显著(0.327***)正相关。研究结果揭示了BAS1基因位点等位变异与小麦粒重、籽粒密度间的密切联系,这对解释小麦产量形成机制及其指导高产育种具有重要的意义。BAS1（phyB activation-tagged suppressor1） is considered to be a key gene in the regulation of Brassino-lide（Br） activation.In this research,the relationship between allelic variation of BAS1 and the two traits including 1 000-grain weight（TGW） and grain density was studied by using a recombined inbred line（RIL） population derived from the cross between Heshangmai（HS） and Yumai8679.The results showed that the allelic variation in BAS1 locus had a significant effects on the two traits（TGW and grain density）,the lines with BAS1-Bgenotype in the population had significantly higher value of Kilo-grain weight and grain density than that of lines with BAS1-A phenotype allele,which showed a close positive relationship between allelic variation and kilo-grain weight（0.178＊） and grain density（0.327＊＊＊）.It suggested that the BAS1 locus have a tight association with the two traits,which might be helpful to high yield breeding program in common wheat.

关 键 词：普通小麦(Triticum ae stivumL.) BAS1 等位变异 籽粒密度 千粒重 

分 类 号：S512.1[农业科学—作物学]