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1.
Genomicsisabiologytermappearedtenyearsago,usedtodescribetheresearchesofgenomicmapping,sequencing,andstructureanalysis,etc.Genomics,thefirstjournalforpublishingpapersongenomicsresearchwasbornin1986.Inthepastdecade,theconceptofgenomicshasbeenwidelyacce…  相似文献   

2.
Lodgingresistancehasbeenakeytargettraitforraisingyieldpotentialinriceanditisassociatedwithmanycom ponenttraitssuchasplantheightandstemthicknessandstrength,etc.Whilephenotypicselectionforlodgingre sistancehasbeeneffective,itsgeneticbasisremainspoorlyun…  相似文献   

3.
Ricepaniclelengthisaquantitativetraitcontrollednotonlybygeneticfactorsbutalsobyenvironmentconditions,especiallybynitrogensupplylevel.Itissupposedthatgenesofricepaniclelengthcouldbefullyexpressedundersuffi cientNsupplyandberestrictedbylowNstress.Deter…  相似文献   

4.
Abioticstressesincludingpotassiumdeficiencyarelimitingfactorsforincreasing rice yield.Ninerice genotypes(OryzaSativaL.,indica)differinginsensitivitytolowKstressselectedfrom200volume_solutionscreening wereusedinthisstudytoexamineaccumulationandtransloca…  相似文献   

5.
Theshapesofsilicabodiesfrommo torcellsofindicaandjaponicaricearedifferent,soitispossibletobusedtodistinguishricesubspecies.BasedonthemorphologicalanalysisofsilicabodiesfromnativevarietiesinAsiancountries,thediscriminatefunctionfordistinguishingsubspe…  相似文献   

6.
Thedeclineofricequalityandgerminationabilityintheprocessofstoragewasabigproblemtofoodproductionandmanagement.Gasandtemperaturecontrolwasusedtode creasestoragelosing,butselectinggermplasmwithgoodstoragecharacterswasrare.Inpractice,itwasfoundthatstorag…  相似文献   

7.
Whitebackedplanthopper(WBPH),Sogatellafurcifera(Horvath),isoneofthemostdevastatinginsectpestsonriceinAsia.Itscontrolmainlydependedonthechemicalpesticides.Surveysofinsecticidesusceptibilityrevealedthatorganophos phorusandcarbamateresistancehasemergeds…  相似文献   

8.
Japanese japonicaricecommonlyprovideswithanovicidalresistanceagainstthewhitebackedplanthopper(WBPH).Similarly,ovicidalactivi tywasalsofoundtoplayasignificantroleinastablefieldresistancetoWBPHinsomeChinese japonicarice.Ricevarietieswithovicidalre sistan…  相似文献   

9.
Morethan70Streptomyceslavendulohygtroscopicusstrainswereisolatedfromthesoilsamplescollectedunderdifferentecologicalconditions.Fermentationcentrifugalsupernatant(FCS)ofthestrianswereusedasbiologicalcontrolagentstobioassayricediseasepathogensofsheathbl…  相似文献   

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

11.
ThestudyledbyDrKunihiroY.(Japan)andDrQIANQian(China)nowadvancessmoothly.Mainpurposesandbackgroundsofthestudycanbedescribedasfollows:1)RiceisthemaincerealcropinChina.Successofthehybridricemakesthericeyieldsatisfyingtheincreas ingdemands.Butcreating aco…  相似文献   

12.
Structuresofpapillaoflemmaamong23Oryzaspecieswereinvestigatedandclassifiedinto6kindsbyscanningelectronmicroscopy.Thelemmasurfacewascomposedofpapillapedestalswithmulti_rowlongitudinalorderedarrangementsandthepapillawasinsertedintopedestal.Themorpholog…  相似文献   

13.
Rootexudateisamajorindexthatreflectsrootsystemac tivity.Tostudythechangesofrootsystemactivityafterinitialheadingstage,weestablishedaHPLCmethodforanalyzingroot_producedcytokininsofriceexudates,andusedthismethodtomeasurethecomponentsofthecytokinins.Int…  相似文献   

14.
Bacterialblight(BB)causedby Xanthomonasoryzaepv.oryzae(Xoo)isoneofthemostdestructivediseasesofricethroughouttheworld.Thisstudywasconductedtounderstandthequalitativeandquantitativecomponentsinresis tanceofasegregatingricepopulationtospecificXoostrains.…  相似文献   

15.
Creation of new plant type and breeding super rice in northern China   总被引:2,自引:0,他引:2  
ThesubjectofbreedingsuperjaponicariceinnorthernChina,wasgrownoutoftheresearchthroughcrossingin dicawithjaponicaandbreedingforidealplanttypes.Sofar,ithasworkedwiththreestages:researchonfunda mentalprinciples,creationofgermplasmsfornewplanttypes(NPT),an…  相似文献   

16.
Itwasdifficulttousethepronouncedheterosisofindi ca_japonicahybridsriceduetothepaniclesterilitycausedbymaleandfemalegameteabortion.Thefemalegameteabortioninmostofsubspecifichybridscouldbesolvedbyusinganabortion_neutralgeneS5_n,awidecompatibilitygene.T…  相似文献   

17.
Plantharbouredproteaseinhibitorisapartofthenaturalplantdefensesys temagainstinsectpredation.Plantstransformedwithforeign plant pro teaseinhibitorgenescanenhancere sistancetoinsectpests.Sofar,atleast20kindsofplants,includingtobacco,rice,tomato,cottoneta…  相似文献   

18.
Itiswellknownthatriceseedcontainslargeamountofseedbornebacterialpathogens.However,littleisknownaboutantagonisticbacteriaofthericeseed.ThissurveywastakentounderstandthedifferenceofthebiologicalagentsofthericeseedinthePhilippines(tropic)andinZhejiangPr…  相似文献   

19.
ThesomaclonalmutantHX_3hasshownabroadspectrumresistancetobacterialblight.TostudytheinheritanceofthebacterialblightresistanceinHX_3,acrosswasmadebetweenHX_3andasusceptiblecultivarLongtefuA.TheF2populationof418plantswasinoculatedwithChinesebacterialbli…  相似文献   

20.
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   

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