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1、棉花学报CottonScience2015袁27渊6冤院524―533棉花远缘杂交创制抗黄萎病新种质1,22221*1*肖松华袁刘剑光袁赵君袁吴巧娟袁俞敬忠袁喻德跃渊1.南京农业大学/作物遗传改良与种质创新国家重点实验室袁南京210095曰2.江苏省农业科学院经济作物研究所袁南京210014冤摘要院本研究通过陆地棉与异常棉尧辣根棉尧旱地棉尧雷蒙德氏棉尧黄褐棉等野生棉的远缘杂交和回交等袁育成65份陆地棉背景的远缘种质系遥农艺性状鉴定结果袁这些种质系的株高平均值与陆地棉品种处于相同水平袁单株果枝数尧单株果节数尧单株结铃数尧铃重尧衣分平均值均低于陆地棉品种袁纤
2、维长度尧断裂比强度均高于陆地棉品种袁马克隆值均低于陆地棉品种遥落叶型黄萎病菌系V991人工病圃抗性鉴定结果袁从65份陆地棉背景的远缘种质系中获得5份抗黄萎病的棉花新种质系袁其中苏远040尧苏远045尧苏远061病情指数分别为8.33尧4.35尧7.79袁高抗黄萎病曰苏远030尧苏远034病情指数分别为12.35尧13.70袁抗黄萎病遥追踪陆地棉抗黄萎病新种质系的亲缘关系发现袁苏远040和苏远045为陆地棉与雷蒙德氏棉杂交后代袁苏远061为陆地棉与黄褐棉杂交后代袁苏远030和苏远034为陆地棉与旱地棉杂交后代遥这些优质尧抗黄萎病新种质的育成袁拓宽了陆地棉的
3、遗传基础袁为我国棉花抗病新品种选育提供种质材料遥关键词院棉花曰远缘杂交曰抗黄萎病曰新种质曰创造中图分类号院S562.035.1文献标志码院A文章编号院1002-7807渊2015冤06-0524-1010.11963/issn.1002-7807.2015060041,22221*1*XiaoSonghua,LiuJianguang,ZhaoJun,WuQiaojuan,YuJingzhong,YuDeyue(1.210095,;2.210014,)Tocreatenewgermplasmlinesresistanttowiltinuplandcotto
4、n,65distanthybridizationgermplasmlines(DHGLs)inuplandcottongeneticbackgroundwerecultivatedbyinterspecifichybridizationbetweenandwildspeciesincluding,,,,,interspecificF1backcrossingwithforfourgenerations,andselfingforfourgenerations,followedbyaconventionalbreedingprogram.Theresult
5、sofagronomictraitidentificationduring2011-2012indicatedthataverageplantheightsofDHGLswerecloselysimilartocom-mercialcultivarsofuplandcotton,whileaveragefruitbranches,fruitnodes,bollsofDHGLsindividualplantwerelowerthanthoseincommercialcultivarsofuplandcotton.Averagesinglebollweigh
6、tandlintpercentageofDHGLswerelowerthancom-mercialcultivarsofuplandcotton.Fiberlength,strength,finenessandmaturityofDHGLswerereasonablycollocated.Fiberofmostlineswassuitableforspinningextrahighcountyarn,butthemainfiberqualityindicesofcommercialcultivarsofuplandcottonwerenotwellcoo
7、rdinated.Identificationofresistancetowiltindefoliationdiseasenurseryduring2012-2013indicatedthatfiveDHGLsresistanttowilt.Suyuan040,Suyuan045andSuyuan061werehighlyresistanttowiltwithadiseaseindexof8.33,4.35and7.79,respectively.Suyuan030andSuyuan034wereresistanttowiltwithadiseasein
8、dexof12.35and13.70,respectively.Thegenet
