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1、江蘇農(nóng)業(yè)學(xué)報(bào)(JiangsuJ.ofAg.Sci.),2014,30(3):486~490486http://wWW.jSaYxb.eom翟國偉,王華,鄒桂花,等.高粱芒基因Awn3.的精細(xì)定位[J].江蘇農(nóng)業(yè)學(xué)報(bào),2014,30(3):486-490doi:10.3969/j.issn.1000d440.2014.03.005高梁芒基因Awn3.1的精細(xì)定位翟國偉,王華,鄒桂花,邵健豐,陶躍之(浙江省植物有害生物防控重點(diǎn)實(shí)驗(yàn)室/浙江省農(nóng)業(yè)科學(xué)院作物與核技術(shù)利用研究所,浙江杭州310021)摘要:為了確定高粱有、無芒表型的遺傳
2、特性,以無芒高梁品種Btx623和有芒品種7361為親本做雜交,分析了F植株和F分離群體中的l155個(gè)單株的芒性基因遺傳規(guī)律,結(jié)果顯示有芒性狀是受t個(gè)隱性單基因Awn3.控制的質(zhì)量性狀。利用覆蓋高粱10條染色體的自行開發(fā)的250對SSR引物在兩親本間篩選多態(tài)性標(biāo)記,利用這些標(biāo)記和22個(gè)表型有芒的隱性單株對芒性基因進(jìn)行初定位,將目標(biāo)基因定位在第3號染色體SSR標(biāo)記sin03100和sm03108之間,與兩標(biāo)記的遺傳距離分別為11.4cM和4.5cM。為了進(jìn)一步縮小定位區(qū)間,對親本7361的相關(guān)區(qū)段進(jìn)行了測序,與已公布的B~623
3、序列比對后設(shè)計(jì)了InDel標(biāo)記,并把定位群體擴(kuò)大到214個(gè)F:隱性單株。通過擴(kuò)大群體和開發(fā)新的標(biāo)記,將目的基因Awn3.』精細(xì)定位在標(biāo)記lnDel—和InDel-2之間的約115kb范圍內(nèi)。關(guān)鍵詞:高粱;芒;Awrd.;SSR標(biāo)記;基因定位中圖分類號:s514.035.3文獻(xiàn)標(biāo)識碼:A文章編號:10004440(2014)03-0486-05FinemappingofawngeneinSorghumbicolor(L.)MoenchZHAIGuo—wei,WANGHua,ZOUGui—hua,SHAOJian-feng,TA0
4、Yue—zhi(StateKeyLaboratoryBreedingBaseforZhejiangSustainablePestandDiseaseControl~InstituteofCropandNuclearTechnologyUtilization,ZhejiangAcademyofAgriculturalSciences,Hangzhou310021,China)Abstract:TheinheritancecharacteroftheawnnessofsorghumwereinvestigatedinFland11
5、55individualsofF2segregationpopulationderivedfromacrossbetweenawnlesseuhivarBtx623andawnedeultivar7361.Itwasshowedthatthetraitofawnnesswascontrolledbyasinglerecessivegene.Thepolymorphismoftotally250SSRmarkersdistributedthroughoutthegenomeofsorghumwereidentified.Thep
6、olymorphiemarkersand22recessiveF2plantswereusedtoprima—rilymapthegene.Thegenewaslocatedbetweenmarkerssm03100andsm03108onchromosome3,withgeneticdistancesof11.4cMand4.5cM,respectively.Tonarrowdownthelocatedinterval,InDelmarkersweredevelopedthroughsequen—cing7361andali
7、gnmentwithBtx623,andthemappingpopulationwasenlargedto214recessiveF2plants.WithnewlyminedInDelmarkersandenlargedpopulation,thetargetregionharboringAwn3.Jwasfinallynaroweddowntoa115kbfragmentbetweenmarkersInDel一1andlnDel-2.Keywords:sorghum;awn;Awn3.;SSRmarker;genemapp
8、ing收稿日期:2014~2-28基金項(xiàng)目:國家自然科學(xué)基金項(xiàng)目(31000739);浙江省農(nóng)業(yè)科學(xué)院重點(diǎn)實(shí)驗(yàn)室前瞻類項(xiàng)目高粱是僅次于小麥、水稻、玉米、大麥的世界第五作者簡介:翟國偉(1984一),男,河南安陽人,碩士研究生,主要從事大禾谷類作物。高粱的主要產(chǎn)物籽粒除用作食品