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1、中國油料作物學(xué)報2013,35(2):117-122ChineseJournalofOilCropSciencesdoi:10.7505/j.issn.1007-9084.2013.02.002甘藍型油菜-埃塞俄比亞芥種間雜交非整倍體后代的遺傳112祁玉潔,袁世峰,戚存扣(1.南京農(nóng)業(yè)大學(xué)農(nóng)學(xué)院,江蘇南京,210095;2.農(nóng)業(yè)部長江下游棉花油菜重點實驗室,江蘇南京,210014)摘要:非整倍體Nj04-089為甘藍型油菜(BrassicanapusL.)與埃塞俄比亞芥(B.carinataA.Br.)種間雜交后代中獲得的附加系。為分析Nj04-089的遺傳
2、特性,利用顯微鏡對Nj04-089自交后代的根尖細胞染色體進行計數(shù)、對花粉母細胞染色體分裂行為進行觀察,并采用PCR、GISH和Southern雜交等技術(shù)對Nj04-089的2個連續(xù)自交后代的附加染色體進行了遺傳分析。結(jié)果顯示:這兩個連續(xù)自交世代根尖細胞染色體數(shù)2n=37~51條;花粉母細胞減數(shù)分裂的中期染色體構(gòu)型分別為(0-4)Ⅰ+(16-23)Ⅱ+(0-2)Ⅲ和(0-8)Ⅰ+(14-24)Ⅱ+(0-4)Ⅲ+(0-1)Ⅳ,且觀察到染色體橋、染色體落后、分裂周期不同步等異常行為。結(jié)果表明在該非整倍體后代中未檢測到蕓薹屬B組染色體或大的片段,推測非整倍體附加的染
3、色體并非整條或大片段B組染色體。關(guān)鍵詞:甘藍型油菜;埃塞俄比亞芥;非整倍體;基因組原位雜交;Southern雜交中圖分類號:S565.403文獻標(biāo)識碼:A文章編號:1007-9084(2013)02-0117-06InheritanceofadditionalchromosomesinprogeniesofananeuploidyderivedfromBrassicanapusandB.carinata112QIYu-jie,YUANShi-feng,QICun-kou(1.AgronomyCollegeofNanjingAgriculturalUniver
4、sity,Nanjing210095,China;2.KeyLabofCottonandRapeseed(Nanjing),MinistryofAgriculture,Nanjing210014,China)Abstract:AneuploidyNj04-089wasanadditionlinederivedfrominter-specificcrossofBrassicanapus×B.carinata.Toanalyzetheinheritanceoftheaneuploidy,chromosomeofroot-tipcellfromtwoNj04-089
5、consecutive-selfinggenerationswereobserved.Moreover,microscopeandchromosomebehaviorsofpollenmothercellsatmeiosisweredetectedbyPCR,Genomicinsituhybridization(GISH)andSouthernblot.Resultsshowedthattwogenerationshadchromosomenumbersof2n=37~51inroot-tipcells.Thechromosomeconfigurations
6、ofpollenmothercellatmetaphaseⅠwere(0-4)Ⅰ+(16-23)Ⅱ+(0-2)Ⅲand(0-8)Ⅰ+(14-24)Ⅱ+(0-4)Ⅲ+(0-1)Ⅳrespectively.Abnormalbehaviorofchromosomepairingwasdetectedincludingchromosome-bridge,chromosomeslagging,andchromosomeunequaldistribution.PCR,GISH,andSouthernblotresultsshowedthattheaneuploidyha
7、dnogeneticinformationonBgenome.ItcouldbeconcludedthattheadditionalchromosomeswerenotfromentireorlargefragmentofBrassicaBgenome.Keywords:BrassicanapusL.;BrassicacarinataA.Br.;Aneuploidy;GISH;Southernblot[1]蕓薹屬(Brassica)是蕓薹(Brassicaceae)中最重2n=34)三個異源四倍體物種。要的一個屬。蕓薹屬包括白菜型油菜(B.rapa,AA,甘
8、藍型油菜起源于歐洲,遺傳基礎(chǔ)單一。通過