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1、中国水稻科学(ChinJRiceSci),２０１５,２９(３):３２７－３３４http://www．ricesci．cnDOI:１０．３９６９/ji．ssn．１００１Ｇ７２１６．２０１５．０３．０１３３２７四川省稻瘟病菌群体遗传结构分析王玲１,２左示敏１张亚芳１陈宗祥１潘学彪１,∗黄世文２,∗(１扬州大学江苏省作物遗传生理重点实验室/教育部植物功能基因组学重点实验室,江苏扬州２２５００９;２中国水稻研究所,杭州３１０００６;∗通讯联系人,EＧmail:shuidao＠yzu．edu．cn;huangsh
2、iwen＠caas．cn)GeneticStructureofRiceBlastPathogenMagnaportheoryzaeinSichuanProvinceWANGLing１,２,ZUOShiＧmin１,ZHANGYaＧfang１,CHENZongＧxiang１,PANXueＧbiao１,∗,HUANGShiＧwen２,∗(１KeyLaboratoryofCropGeneticsandPhysiologyofJiangsuProvince/KeyLaboratoryofPlantFunction
3、alGenomicsofMinistryofEducation,YangzhouUniversity,Yangzhou２２５００９,China;２ChinaNationalRiceResearchInstitute,Hangzhou３１０００６,China;∗Correspondingauthor,EＧmail:shuidao＠yzue．duc．n;Huangshiwen＠caasc．n)WANGLing,ZUOShimin,ZHANGYafang,etal．Geneticstructureofrice
4、blastpathogenMagnaportheoryzaeinSichuanProvince．ChinJRiceSci,２０１５,２９(３):３２７Ｇ３３４．Abstract:Riceblast,causedbyMagnaportheoryzae,isoneofthemostdestructivediseaseworldwide．ThegeneticstructureoffivepopulationsofM．oryzae,collectedfromMianyang,Yingshan,Ya’an,Bei
5、chuanandWushengofSichuanProvince,wereanalyzedusingsixfluorescentlabeledSSRmarkers．Atotalof４３polymorphicalleleswereproducedin１２４isolatesofM．oryzae．Themeannumberofobservedalleles(Na)andeffectivealleles(Ne)perlocuswere７．２and３．１,respectively,andalllociexhibi
6、tedsignificantdeviationsfromHardyＧWeinbergequilibrium．Themeanobservedheterozygosity(Ho＝０．３７４)waslowerthanexpected(He＝０．５０２),indicatingthedeficitofheterozygotesresultingfromtheaccumulationofinbreedingwithinpopulations．Analysisofmolecularvarianceshowedthat
7、themajority(８１．１７％)ofgeneticvariationwasattributedtothedifferencesamongisolateswithinpopulation,withonly１８．８３％ofthevariationresultingfromdifferencesamongpopulations．Highlevelsofgeneticdifferentiation(Fst,０．０５７－０．５２８)existedamongallfivegeographicalpopulat
8、ions．Manteltestrevealednosignificantcorrelationbetweenthegeneticandgeographicaldistancesforallpopulations(r＝－０．２０１,P＝０．５８７),indicatingthatthegeneticvariationofM．oryzaepopulationswasrandomlydistributedingeographicspace．Diff
