禾本科植物自交不亲和基因定位进展.pdfVIP

中国农学通报 2014,30(3):32-37 Chinese Agricultural Science Bulletin 禾本科植物自交不亲和基因定位进展 冉志伟，李保叶，杨定照，胡凤益 （云南农业科学院粮食作物研究所，昆明650205） 摘 要：植物的自交不亲和性普遍存在于禾本科植物中，这是植物在长期进化过程中形成的防止自交退 化，且有利于异花授粉、保持遗传多样性的一种生殖隔离机制。并且植物的自交不亲和机制多种多样， 调控其性状的基因数量也不等。目前，许多实验已经证明禾本科植物的自交不亲和性属于S-Z 型双因 子自交不亲和系统，该类型的自交不亲和系统受到2 个不连锁的复等位基因座S 和Z 的控制。本研究介 绍了禾本科植物双因子S-Z 型自交不亲和系统的起源，并且归纳了多年来对黑麦、天蓝虉草、球茎大麦 和黑麦草等禾本植物自交不亲和调控基因的研究进展。还对禾本科植物S-Z 双因子自交不亲和系统提 出质疑。最终提出通过克服长雄野生稻的自交不亲和性来构建自交不亲和群体，从而用于精细的图位 克隆。 关键词：自交不亲和；S 位点；Z 位点；基因定位；比较基因组学；长雄野生稻 中图分类号：Q812 文献标志码：A 论文编号：2013-0520 Advance in Gene Mapping of Self-incompatibility in Poaceae Plants RanZhiwei,LiBaoye,YangDingzhao,HuFengyi (InstitutionofFoodCrops,YunnanAcademyofAgricultureSciences,Kunming650205) Abstract: Self-incompatibility (SI) was widespread in plants. And it was one of the most important mechanismswhichdevelopedthroughlong-termevolutionofplantstopreventplantsfromselfingandmaintain geneticdiversity.Thevariousmechanismsofplantself-incompatibilitywerecontrolledbydifferentamountsof genes.Uptonow,manyexperimentsattestedself-incompatibilityinPoaceaewhichwascontrolledbytwo unlinked loci (S and Z) which both had series of alleles. This paper described the origin of S-Z self-incompatibility system in Poaceae, and summarized the progress of self-incompatibility genes about Secale cereale, Phalaris coerulescens, Hordeum bulbosum, Lolium perenne andsoon.Inaddition,italso questionedthissystem.Atlast,drawingahigh-resolutionmappingofSandZlocusbyconqueringthe self-incompatibilityofO.longistaminatatoconstructsegregatingpopulationwasproposed. Key words: self-incompatibility;Sloci;Zloci;mapping;comparativegenomics;O.longistaminata 0 引言 表现为