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1.
Gametophytegenes(ga)forsegregationdistortionhavebeenreportedbymanyresearchers.Iwataetal(1964)reportedthepresenceofagametophytegenega1onchromosome6whichcontrolledaselectivefertilizationofgametesinthecrossbetweenanatomic_bomb_irradiatedmutantandanormal…  相似文献   

2.
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   

3.
Japanese japonicaricecommonlyprovideswithanovicidalresistanceagainstthewhitebackedplanthopper(WBPH).Similarly,ovicidalactivi tywasalsofoundtoplayasignificantroleinastablefieldresistancetoWBPHinsomeChinese japonicarice.Ricevarietieswithovicidalre sistan…  相似文献   

4.
杂交早稻旱床育秧易出现的几个问题及对策   总被引:1,自引:0,他引:1  
杂交早稻旱床育秧易出现的几个问题及对策Somecommonproblemsandthecountermeasuresinthedrylandseedlingraisingofearlyhybridrice1出苗不整齐秧苗出现几层楼现象,有的甚至到拔秧...  相似文献   

5.
Thericestemborer,Chilosuppres salis(Walker),isaseriouspestofrice plantsinChina.Z_11_hexadece_nal(Z11_16:Ald),Z_13_octadecenal(Z13_18:Ald),andZ_9_hexadecenal(Z9_16:Ald)werethemajorcompo nentsoffemalesexpheromone.Thereisfewstudyrelatedtothelurestoragedu…  相似文献   

6.
RiceisthestaplefoodcropinChina.Inthesecondhalfofthe20th century,ricehasplayedanimportantroleinfeedingalargenumberofpeople.Inthe21stcentury,ricewillstillbeamainfoodcropinChinaandmakegreatcontributiontoChinesepeople′slife.1.Greatachievementsofrice produ…  相似文献   

7.
ThestudyledbyDrKunihiroY.(Japan)andDrQIANQian(China)nowadvancessmoothly.Mainpurposesandbackgroundsofthestudycanbedescribedasfollows:1)RiceisthemaincerealcropinChina.Successofthehybridricemakesthericeyieldsatisfyingtheincreas ingdemands.Butcreating aco…  相似文献   

8.
Recently,anewTGMSsource,UPRI95_140TGMS,hasbeenidentifiedinourhybridbreedingprogram.TheTGMStraithaddisplayeddigenicin heritance.However,thedetailedin vestigationofthelinerevealedmuchcomplicatedinheritance.Thesalientfindingsweresummarizedbelow:1.Basicge…  相似文献   

9.
In-situ conservation of Dongxiang wild rice   总被引:1,自引:0,他引:1  
In1978_82,theninecommunitiesofDongxiangwildrice(DXWR)belongingtoOryzarufipogonhadbeenfoundscattering about2_3hectaresinDongxiang County ofJiangxiProvince.Dongxiangissituatedat28°14′N,116°36′Eandelevationof47.6m,belongingtothezoneofredsoil.Itisthenorth…  相似文献   

10.
Whitebackedplanthopper(WBPH,SogatellafurciferaHorvath)isoneofthemostdestructiveinsectsforrice.TheutilizationofWBPHresistancegenesisalwaysanefficientsolutiontothis problem.BesidesfiveWBPHresistancegenesregistered,Wbph1,Wbph2,Wbph3,wbph4,andWbph5 ,class…  相似文献   

11.
在室内试验中,增加甲黄隆喷雾能显著减少tralkoxydim防除野燕麦的活性。该现象在 tralkoxydim低剂量(例如,125ga.i/ha)和甲黄隆高剂量(8或 12 ga.i/ha)使用时非常明显。甲黄隆能单独显著地使野燕麦生长发育减少。而绿磺隆在剂量达到 33ga.i./ha仍不能减小野燕麦生长,只能引致 tralkoxydim的活性轻微的下降。在混合使用时,施药后6h时甲黄隆能使施在叶片上的14C-tralxoxydim的吸收减小,但是在后来的取样时间里不影响14C-tralkoxydim的吸收和移动。在体外分析中,分析剂中的甲黄隆10μM 和100μM对野燕麦辅酶羧酸酶(ACCase)的活性无影响,也不干扰tralkoxydim对ACCasc的抑制作用。另外,用甲黄隆4,8和12g/ha处理野燕麦植株,喷药后24-96h收获时,并没有降低可提取的 ACCase的活性水平。甲黄隆对生长发育的暂时性抑制为绝大部分tralkoxydim代谢为无活性物质提供了充足的持续时间,因此减少了tralkoxydim所引致的损害。  相似文献   

12.
Fromover800fungalstrainsofTri chodermaSpp.,6strainswerefoundtogreatlyinhibitthegrowingofRhi zocotoniasolani,thepathogenofricesheathblightindualculture.Amongthem,strainT3wasthebestantago nist,whichreducedthe growing ofthepathogenby52.54%(Table1).Infield,…  相似文献   

13.
Study on the ancient cultivated rice in China   总被引:1,自引:0,他引:1  
SSixty eightancientcultivatedricegrainsof10ruinsof2000 15000BPintheChangjiangRivervalleywerestudiedbyanalyzinggrainshape,using discri minatformulasofbi peakedtubercle(BPT)withtheG(x)=44.4788 -0.4308X1-0.4263X2 0.078X3,whereX1isbi peakeddistance(BPD),X2isp…  相似文献   

14.
Conservation and utilization of rice genetic resources in China   总被引:1,自引:0,他引:1  
RicegeneticresourcespresentsvariablyinChina.Therearelandracesandwildspecies,cultivatedlowlandriceanduplandrice,indica(Hsien)andjaponica(Keng)rice,early,middle,andlatericeaswellasglutinousandnon_glutinousrice.UptoFebruary2000,atotalof76,646riceaccessi…  相似文献   

15.
FragrantRice2:ThericeoriginatedfromChengguandYangxiancoun ties,ShaanxiProvince.Whencooked,itwasfragrantandwaseasytobedigested.Itwassuitableforoldandweakpersons.ZaocaiguRice:ItwasfromXinchengandTianhuatowns,Ding nanCounty,JiangxiProvince.Thericehadshor…  相似文献   

16.
Plantharbouredproteaseinhibitorisapartofthenaturalplantdefensesys temagainstinsectpredation.Plantstransformedwithforeign plant pro teaseinhibitorgenescanenhancere sistancetoinsectpests.Sofar,atleast20kindsofplants,includingtobacco,rice,tomato,cottoneta…  相似文献   

17.
WushanRice:ItgrewinhillylandaroundWuMountaininWangCity,HunanProvince.Itsgrainisbrightandtransparent,andthecookedriceissoft,sticky,fragrant,andsweetintaste.Itwasa"TributeRice"inoldtime.IndianIndica:Growing inWuchang City,HubeiProvince,itwasalsocalled"R…  相似文献   

18.
Pretreatmentofriceseedlingsbyfo liarspraying withbenzothiadiazole(BTH)couldinducesystematicac quiredresistance(SAR)againstblast(Magnaporthegrisea)andbacterialleafblight(Xanthomonasoryzaepv.oryzae)diseases.Toelucidatethephysiologicalandbiochemicalmecha …  相似文献   

19.
M.griseacausesoneofthemajordiseasesonrice,riceblast.Appresoriumformationisthekeyforthepathogentopenetrateintohosttissue.So,itisim portanttostudytheeffectofenvironmentalfactorsontheappresoriumformationindetails.Thispaperreportsourre searchesonthissubje…  相似文献   

20.
Bacterialblightofrice,causedby Xanthomonasoryzaepv.Oryzae(Xoo.),isoneofthemajorricediseasesinChina.Makingcleartheshiftofgeneticdiversityofthepathogenwillprovideimportantinformationforricebreed ing.Strainscollectedfrom11provinceslocatedinSouth ernregio…  相似文献   

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