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1.
潜伏期──玉米大斑病抗性选择的可用指标D.R.Smith,J.G.Kinsey1939年以前,在美国由玉米大斑病菌(Exserobilumturcicum(Pass.)LeonardandSuggs=HelminthosporiumturcicumP...  相似文献   

2.
Toexplorethemechanismsofthedifferencesincapacitiesrelatedtophotodamage_resistanceofindicaandjaponicasubspecies,thexanthophyllcyclecomponents,violaxan thin(V),antheraxanthin(A),zeaxanthin(Z),PSⅡ_D1_proteincontents,andPSⅡ photochemicalefficiency(Fv/Fm)w…  相似文献   

3.
Forty_oneisolatesofBacillusamyloliquefaciensweredif ferentiatedfrom184G bacterialstrainshavinggeneticsimilaritiesover75%basedonBOX_PCRfingerprint.An tagonismagainsttoRhizotoniasolaniinvitrowastested.FourisolatesofB.amyloliquefaciens(2isolateswithan tag…  相似文献   

4.
Japanese japonicaricecommonlyprovideswithanovicidalresistanceagainstthewhitebackedplanthopper(WBPH).Similarly,ovicidalactivi tywasalsofoundtoplayasignificantroleinastablefieldresistancetoWBPHinsomeChinese japonicarice.Ricevarietieswithovicidalre sistan…  相似文献   

5.
Ninebrownplanthopper(BPH)resistancegeneshavebeenregisteredsofar,butofthemonly Bph1,bph2,Bph3,bph4,Bph9,andotherthreeunregisteredgenesBph10(t),Bph(t),bph(t)werelocatedonchromosome3,4,10,and12,respectively,byusingtraditionalandmolecularmappingmethods.T…  相似文献   

6.
Ninety_fivebacterialisolates(63grampositive[G ]bac teria,whichisolatedfromblastlesionand32gramnega tive[G-]bacteria,whichwereisolatedfromriceseeds)weretestedforantagonisticeffectagainstRhizoctoniasolaniandFusariummoniliformeinvitroandforplant_growthpro…  相似文献   

7.
Zhongjian96 3,alateseasonjaponicaricevarietyderivedfromC81 40/87095,wasdevelopedbyCNRRI,withthecharactersofearly maturity,atotalgrowthdurationofabout128d(5 7dlessthanCKXiushui11),insensitivetopho to period,idealplanttype,middletilleringability,strongcul…  相似文献   

8.
水稻对稻纵卷叶螟抗性的研究进展   总被引:1,自引:0,他引:1  
水稻对稻纵卷叶螟抗性的研究进展李马谅(泉州农校,泉州,362000)水稻的卷叶性食叶害虫是多个属、种的复合体,以稻纵卷叶螟cnaphaloercismedinacis为主,包括稻显纹纵卷叶螟susumiaexigua及倒须野螟属MacrsasmiaS...  相似文献   

9.
Wehaverecentlydevelopedasystematicmethodforthestudyontheinheritanceofresistancetosheathblight.Thekeyofthesystemisaninnovatedmethodofinoculationandinvestigationalong withtheemploymentofthepermanentpopulation.Thispaperreportedtheprocedureofthesys temand…  相似文献   

10.
Torelievethedamageofsalttothecell,manyplantsac cumulatedsomelow_molecularweightorganiccompounds,whichwerecalledosmoprotectant,suchasbetaine,man nitol,andsorbitol.Thereforeifthegene_encodingenzymeresponsibleforsynthesizingtheosmoprotectantwastrans form…  相似文献   

11.
应用ELISA检测甜菜品种抗BNYVV病毒差异   总被引:1,自引:3,他引:1  
应用ELISA检测甜菜品种抗BNYVV病毒差异蔡惠珍,孙以楚,张春来(中国农业科学院甜菜研究所)甜菜丛根病(Rhizomunia)是由多粘菌(Polymyxa)为介体传播的甜菜坏死黄脉病毒病(Beetnecroticyellowveinvirus)。...  相似文献   

12.
水稻细菌性条斑病(以下简称细条病)在热带和中国南方已上升为一种主要病害。为探讨杂交水稻及其亲本对该病的抗性规律,笔者在国际水稻所曾用Xanthomonas campestrisPV.oryzicola的两个菌株(93和335号)喷雾接种于五个杂交组合及其亲本上。结果表明,杂交水稻对细条病表现出不同程度的抗病反应,其抗性值接近双亲平均值,且属水平抗性。杂种一 代的抗性在很大程度上决定于恢复杂的抗性水平。  相似文献   

13.
马铃薯抗线虫病育种马铃薯孢囊线虫(Globoderarestochiensis)于1963年在乌克兰被发现。其病害的自然分布区与1980年比较,1992年扩大了10.5倍,而与1975年比较,扩大了34.5倍,这一事实表明了马铃薯孢囊线虫病的传播速度...  相似文献   

14.
鉴定的61份野生花生材料对黄瓜花叶病副经毒CA株系(CMV—CA)抗性差异表现明显,A.glabrataPI262801和A.glabrataPI262794两份材料表现免疫,A.spPI338454表现高抗。A.glatrata、A.pusilla、A.rigvnii、A.paraguariensis和A.cardenasii等5个种的材料对CMV—CA抗性比A.villosa、A.montieola和A.appressipila的材料要强。部分材料对CMV—CA和花生矮化病毒Mi株系(PSV一Mi)两种病毒具有相同的抗性。  相似文献   

15.
Pretreatmentofriceseedlingsbyfo liarspraying withbenzothiadiazole(BTH)couldinducesystematicac quiredresistance(SAR)againstblast(Magnaporthegrisea)andbacterialleafblight(Xanthomonasoryzaepv.oryzae)diseases.Toelucidatethephysiologicalandbiochemicalmecha …  相似文献   

16.
Whitebackedplanthopper(WBPH),Sogatellafurcifera(Horvath),isoneofthemostdevastatinginsectpestsonriceinAsia.Itscontrolmainlydependedonthechemicalpesticides.Surveysofinsecticidesusceptibilityrevealedthatorganophos phorusandcarbamateresistancehasemergeds…  相似文献   

17.
Bacterialblight(BB)causedby Xanthomonasoryzaepv.oryzae(Xoo)isoneofthemostdestructivediseasesofricethroughouttheworld.Thisstudywasconductedtounderstandthequalitativeandquantitativecomponentsinresis tanceofasegregatingricepopulationtospecificXoostrains.…  相似文献   

18.
Gametophytegenes(ga)forsegregationdistortionhavebeenreportedbymanyresearchers.Iwataetal(1964)reportedthepresenceofagametophytegenega1onchromosome6whichcontrolledaselectivefertilizationofgametesinthecrossbetweenanatomic_bomb_irradiatedmutantandanormal…  相似文献   

19.
Morethan10speciesofpathogenicfungiwereisolatedfromthenaturally infectedleavesofbarnyard grass(Echinochloacrus galli)in paddy.After preliminarybioassaying,itwasfoundthattheAlternariaalternata(Fr.)keissler(AA),Exserohilummonoceras(EM),and"99 10"werethreep…  相似文献   

20.
ThestudyledbyDrKunihiroY.(Japan)andDrQIANQian(China)nowadvancessmoothly.Mainpurposesandbackgroundsofthestudycanbedescribedasfollows:1)RiceisthemaincerealcropinChina.Successofthehybridricemakesthericeyieldsatisfyingtheincreas ingdemands.Butcreating aco…  相似文献   

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