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1、作物學(xué)報(bào)ACTAAGRONOMICASINICA2014,40(6):1020?1026http://zwxb.chinacrops.org/ISSN0496-3490;CODENTSHPA9E-mail:xbzw@chinajournal.net.cnDOI:10.3724/SP.J.1006.2014.01020一個(gè)化學(xué)誘變的小麥斑點(diǎn)葉突變體的生理和遺傳分析1,**1,**21111杜麗芬李明飛劉錄祥王超杰劉洋許喜堂鄒淑芳1,*1,*謝彥周王成社12西北農(nóng)林科技大學(xué)旱區(qū)作物逆境生物學(xué)國(guó)家重點(diǎn)實(shí)驗(yàn)室/農(nóng)學(xué)院,陜西楊凌712100;中國(guó)農(nóng)業(yè)科學(xué)院作物科學(xué)研究
2、所,北京100081摘要:通過(guò)EMS誘變普通小麥品系H261,獲得一個(gè)穩(wěn)定遺傳的斑點(diǎn)葉突變體LF2010。自然條件下,該突變體在三葉期葉片基部第一片葉最先出現(xiàn)黃色斑點(diǎn),隨著植株生長(zhǎng)從基部老葉片到上部新生葉片依次出現(xiàn)黃斑，最后葉片上斑點(diǎn)逐漸增多并擴(kuò)散到全片葉、葉鞘、穎殼和麥芒。斑點(diǎn)部位不存在細(xì)胞死亡,斑點(diǎn)性狀的表達(dá)受光照和溫度誘導(dǎo),突變體的色素含量、光合速率隨著斑點(diǎn)的出現(xiàn)而顯著下降。突變體的株高、有效穗數(shù)、單株產(chǎn)量、穗長(zhǎng)、結(jié)實(shí)率和旗葉長(zhǎng)等農(nóng)藝性狀顯著下降,但是千粒重和旗葉寬卻與野生型無(wú)差異。將突變體與正常綠色品系雜交,對(duì)其F1、F2和BC1代的遺傳分析表明,L
3、F2010的突變性狀由1對(duì)隱性核基因控制。關(guān)鍵詞:斑點(diǎn)葉突變;光合色素;光合特性;農(nóng)藝性狀;遺傳分析PhysiologicalCharacteristicsandGeneticAnalysisonaSpotted-leafWheatDerivedfromChemicalMutation1,**1,**21111DULi-Fen,LIMing-Fei,LIULu-Xiang,WANGChao-Jie,LIUYang,XUXi-Tang,ZOUShu-Fang,1,*1,*XIEYan-Zhou,andWANGCheng-She12StateKeyLaborat
4、oryofCropStressBiologyinAridAreas/CollegeofAgronomy,NorthwestA&FUniversity,Yangling712100,China;InstituteofCropSciences,ChineseAcademyofAgriculturalSciences,Beijing100081,ChinaAbstract:Alightandtemperatureaffectedspotted-leafmutantLF2010(TriticumaestivumL.)wasobtainedfromamutagenic
5、treatmentwithEMSonawheatlineH261.Thebrightyellowspotsfirstappearontheprimaryleafatthreeleavesstage,thencov-eredlaterleavesandleafsheathsofthewholeplantincludingtissuesofspike.Themutantplantsdifferedfromnormalplantsintermsoftotalchlorophyllcontentandnetphotosyntheticrateoncesymptoma
6、ppearedontheleaves.Theplantheight,spikelength,spikenumberperplant,grainweightperplant,grainnumberperspike,seedsettingrate,andflagleaflengthwerelowerinthemutantthaninthewildtype.However,the1000-grainweightandflagleafwidthofthemutanthadnosignificantdifferencewiththoseofthewildtype.Ge
7、neticanalysisbasedonF1,F2,andBC1populationsrevealedthattheyellowspottraitwascontrolledbyasinglerecessivegene.Keywords:Spotted-leafmutant;Photosyntheticpigments;Photosyntheticcharacteristics;Agronomictraits;Inheritance[1]葉色突變是普遍存在于各種植物的一類突變不正常。植物成色過(guò)程十分復(fù)雜,這就決定了葉[2-5]類型。根據(jù)不同表型的葉色特點(diǎn)將其劃
8、分成3類,色突變?cè)虻亩嘧冃院屯蛔冾愋偷亩鄻有?因一
