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1、浙江農(nóng)業(yè)學(xué)報(bào)ActaAgriculturaeZhefiangensis,2014,26(3):702-707http://www.zjnyxb.cn邱海萍,毛雪琴,姜華,等.浙江省水稻立枯絲核菌5.8SrDNA—ITS區(qū)間多樣性[J].浙江農(nóng)業(yè)學(xué)報(bào),2014,26(3):702-707.DOI:10.3969/j.issn.1004-1524.2014.03.28浙江省水稻立枯絲核菌5.8SrDNA—ITS區(qū)間多樣性邱海萍,毛雪琴,姜華,王艷麗,孫國(guó)昌'(浙江大學(xué)農(nóng)業(yè)與生物技術(shù)學(xué)院,浙江杭州310058;浙江省植物有害生物防控重點(diǎn)實(shí)
2、驗(yàn)室——省部共建國(guó)家重實(shí)驗(yàn)室培育基地,浙江省農(nóng)業(yè)科學(xué)院植物保護(hù)與微生物研究所,浙江杭州310021)摘要:對(duì)浙江省82個(gè)水稻立枯絲核菌菌株及13個(gè)標(biāo)準(zhǔn)融合群菌株5.8SrDNA—ITS(ITS)區(qū)間測(cè)序和分析,結(jié)果表明,ITS在標(biāo)準(zhǔn)融合群菌株間的差異遠(yuǎn)大于AG1一IA融合群的水稻菌株間的差異,進(jìn)化分析表明,ITS的差異可以有效甄別不同標(biāo)準(zhǔn)融合群菌株,但對(duì)AG1.IA融合群的水稻菌株區(qū)分能力非常有限。單倍型分析表明,這82個(gè)水稻菌株可以分為10個(gè)單倍型。田間菌株的單倍型多樣性(Hd)為0.2087,核苷酸多樣性為0.00033。其中單
3、倍型Hl為優(yōu)勢(shì)單倍型,占全部菌株的87.8%,而其他9個(gè)單倍型則各只有1株菌株。中性檢驗(yàn)結(jié)果表明Tajima’SD測(cè)驗(yàn)值為一2.26012(P<0.01),F(xiàn)u和Li’SD測(cè)驗(yàn)值為一5.20827(P<0.02),暗示浙江省水稻紋枯菌菌株顯著偏離中性假說(shuō),在歷史上可能出現(xiàn)過(guò)種群擴(kuò)張,并存在很強(qiáng)的選擇作用。關(guān)鍵詞:立枯絲核菌;水稻;轉(zhuǎn)錄間隔區(qū);序列測(cè)定;單倍型中圖分類號(hào):Q78文獻(xiàn)標(biāo)志碼:A文章編號(hào):1004—1524(2014)03-0702-06DiversityresearchonRhizoctoniasolaniisolate
4、dfromZhejiangProvinceusingsequenceanalysisof5.8SrDNA.ITSintervalQIUHai—ping,,MAOXue—qin,JIANGHua,WANGYan—li,SUNGuo—chang'(CollegeofAgricultureandBiotechnology,ZhejiangUniversity,Hangzhou310058,China;StataKeyLaboratonyBreedingBaseforZhejiangSustainablePestandDiseaseCont
5、rol,InstituteofPlantProtectionandMicrobiology,ZhefiangAcademyofAgriculturalSciences,Hangzhou310021,China)Abstract:Eighty-twoR.solanistrainsand13standardanastomosisgroupstrainswereusedinthesequenceanalysis0f5.8SrDNA-ITS(ITS)interva1.ThedifferencesinsequencesofITSinterva
6、lamonganastomosisgroupstrainsweremuchlargerthanthatamongtheAG1一IAstrains.PhylogeneticanalysisshowedthatthedifferencesinsequencesofITSintervalcouldefectivelydistinguishstrainsfromdifferentanastomosisgroups.Butwhenthestrainsbelongingtothesameanastomosisgroupwereconcerned
7、,theusageofthedifferencesinsequencesofITSintervalwasquitelimited.Haplotypeanalysisshowedthat82ricestrainscouldbedividedinto10haplotypes.Haplotypediversity(Hd)ofthesefieldisolateswas0.2087,andthetotalnucleotidediversitywas0.00033.H1wasthedominanthaplotype.a(chǎn)ccountingfor8
8、7.8%ofallstrains.whileeachoftheotherninehaplotypesonlycontainedonestrain.NeutraltestresultsshowedthatTajima'sDtestval