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1、第31卷第11期作物学报Vol131,No1112005年11月1495~1499页ACTAAGRONOMICASINICApp11495-1499Nov1,2005甘蓝型油菜菌核病抗性的遗传分析**何昆燕易斌傅廷栋涂金星(华中农业大学作物遗传改良国家重点实验室,湖北武汉430070)摘要:利用牙签接种和花瓣接种法鉴定了甘蓝型油菜DH821(抗)@DHBao604(感)组合P1、P2、F1、BC1、BC2和F26个世代群体菌核病的抗性,通过主基因-多基因混合遗传模型分析表明,牙签接种3d的抗性受2对加性主基因+加性-显性多基因控制,BC1、BC2、F2群
2、体主基因遗传率为12149%~28148%,多基因遗传率为21108%~27187%;接种5d的抗性由2对加性-显性-上位性主基因控制,显性及显性互作效应明显,无多基因修饰,BC1、BC2和F2群体主基因遗传率为25119%~38169%;接种3~5d的菌丝扩展抗性由2对加性-显性-上位性主基因+加性-显性多基因控制,主基因效应明显,多基因效应不明显,BC1、BC2、F2群体主基因遗传率为0172%~54106%,多基因遗传率为7134%~46179%。花瓣接种15d的抗性由2对加性-显性-上位性主基因+加性-显性-上位性多基因控制,2对主基因的加性效应
3、和显性效应为-316051~-315225,互作效应为315190~316089,主基因遗传率为0191%~41179%,多基因遗传率为19132%~73169%。关键词:甘蓝型油菜;菌核病;抗性鉴定;抗性遗传中图分类号:S565GeneticAnalysisofResistancetoSclerotiniasclerotioruminBrassicanapusL1*HEKun-Yan,YIBin,FUTing-Dong,TUJin-Xing(NationalKeyLaboratoryofCropGeneticImprovement,HuazhongAg
4、riculturalUniversity,Wuhan430070,Hubei,China)Abstract:ResistancetoSclerotiniasclerotiorum(Lid)deBaryincrossofDH821@DHBao604(BrassicanapusL1)wasassessedbymycelialtoothpicksandpetalsinoculations,andtheinheritanceofresistanceinthiscrosswasanalyzedbyapplyingthemajorgenepluspolygenemo
5、delofquantitativetraitstoajointanalysisofmult-igenerations(P1,P2,F1,BC1,BC2andF2)1Theresultsshowedthatresistancemeasured3daftermycelialtoothpicksinoculationwascontrolledby2pairsofmajorgeneswithadditiveeffectspluspolygenewithadditive-dominanteffects1Heritabilityvaluesofthemajorgen
6、esofBC1,BC2,andF2populationswerefrom12149%to28148%,whiletheseofpolygenewerefrom21108%to27187%1Resistancemeasured5dafterinoculationwascontrolledby2pairsofmajorgeneswithadditive-dominan-tepistaticeffects,amongwhichdominantandassociatedepistaticeffectsweresignificant1Heritabilityval
7、uesofthemajorgenesofBC1,BC2,andF2populationswerefrom25119%to38169%1Resistancetoexpansionofmyceliaduring3-5dafterinoculationwascontrolledby2pairsofmajorgeneswithsignificantadditive-dominan-tepistaticeffectspluspolygenewithlowadditive-dominanteffects1Heritabilitiesofmajorgenesandpo
8、lygeneinBC1,BC2,andF2populationswerefrom
