27个二倍体和10个四倍体小麦近缘种抗叶锈性鉴定

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1、作物学报ACTAAGRONOMICASINICA2010,36(8):13931400http://www.chinacrops.org/zwxb/ISSN0496-3490;CODENTSHPA9E-mail:xbzw@chinajournal.net.cnDOI:10.3724/SP.J.1006.2010.0139327个二倍体和10个四倍体小麦近缘种抗叶锈性鉴定1,21,*袁军海陈万权12中国农业科学院植物保护研究所/植物病虫害生物学国家重点实验室,北京100193;河北北方学院农学系,河北宣化075131摘要:利用

2、我国小麦叶锈菌5个优势致病类型的混合菌种,在田间对27个二倍体和10个四倍体小麦近缘种成株期抗病性进行了接种鉴定,发现3个粗山羊草、1个野生二粒小麦和3个硬粒小麦表现免疫,1个一粒小麦、9个粗山羊草和1个硬粒小麦表现抗病,说明目前这些材料所含抗叶锈病基因有很高的开发应用价值。选择18个有鉴别作用的小麦叶锈菌致病类型,在不同温度下进行苗期抗叶锈病基因推导,根据抗感反应模式,推定粗山羊草Y192含Lr40,Ae37和Y190含Lr41,硬粒小麦Altar84、Doliu、Dr147和Volcani447含Lr23和未知基因;Ae3

3、9、T96243和Y193等10个粗山羊草和野生二粒小麦不含苗期抗叶锈病基因。粗山羊草Ae39、T96243、Y193和野生二粒小麦在成株期表现免疫至抗病且严重度≤10%,说明具有成株期抗病性特点。关键词:小麦;二倍体;四倍体;抗叶锈病基因;基因推导LeafRustResistancein27Diploidsand10TetraploidsofWheatRelatives1,21,*YUANJun-HaiandCHENWan-Quan1StateKeyLaboratoryforBiologyofPlantDiseasesand

4、InsectPests/InstituteofPlantProtection,ChineseAcademyofAgriculturalSciences,Bei-2jing100193,China;DepartmentofAgronomy,HebeiNorthUniversity,Xuanhua075131,ChinaAbstract:Resistanceof37accessionsofwheatrelatives,including27accessionsofdiploidand10accessionsoftetraploid

5、,to5prevalentpathotypesofPucciniatriticinawasidentifiedinthefieldatadultplantstage.ThreeaccessionsofTriticumtauschii,oneaccessionofT.dicoccoides,and3accessionsofT.durumexhibitedimmunityandoneaccessionofT.monococcm,nineaccessionsofT.tauschii,andoneaccessionofT.durumw

6、ereresistanttothepathotypes.Thisresultsuggeststhattheresistancegenesinvolvedintheseresourcesareofgreatvalue.Basedoninfectiontypes(ITs),leafrustresistancegene(s)forthe37relativeswerealsopostulatedwitheighteendifferentialpathotypesunderdifferenttemperaturesatseedlings

7、tage.InT.tauschiiaccessions,Y192mightcarryLr40;Ae37andY190mightcarryLr41.Fouraccessionsofdurumwheat,i.e.Altar84,Doliu,Dr147,andVolcani447,mightcarryLr23andunknownLrgene(s).TherewerenoputativeLrgenesin10accessionsofT.tauschii,suchasAe39,T96243,andY193,andT.dicoccoide

8、s.Atadultplantstage,Ae39,T96243,andY193showedITsfrom“I”to“R”,withtheseveritylessthan10%.Thisindi-catesthatthosematerialsprobablypossessadu