简介：Tiller角度，一个很必要的农学的特点，在米饭繁殖是重要的，特别在植物类型繁殖。控制2的一个tiller角度(tac2)异种被乙醇甲烷磺酸盐mutagenesis从restorer线Jinhui10获得。tac2异种在幼苗阶段和显著地在tillering阶段增加的tiller角度显示了正常显型。初步的生理的研究显示异种对GA敏感。因此，TAC2和TAC1可能以一样的方法控制tiller角度，这被推测。基因分析证明变异的特点被主要后退的基因控制并且位于用SSR标记的染色体9。在TAC2和它的最近的标记RM3320和RM201之间的基因距离分别地是19.2厘米和16.7厘米。

简介：Byusing304recombinantinbredlinesderivedfromindicaricecrossZhong156/Gumei2,alinkagemapconsistingof177markerlociandcovering12ricechromosomeswasconstructedandemployedformappinggenesconferringblastresistanceinrice.GenomiclocationofgenePi25(t)conferringneckblastresistancetotheChineseisolate92-183(raceZC15)wasverifiedtobelocatedbetweenmarkersA7andRG456onchromosome6,withgeneticdistancesof1.7cMand1.5cMtoA7andRG456,respectively.LeafblastresistanceofGumei2tothePhilippineisolateCa89(lineage4)wasfoundtobecontrolledbyasinglegene.ThegenetentativelydesignatedasPi26(t)waslocatedbetweenmakersB10andR674onchromosome6,withgeneticdistancesof5.7cMand25.8cMtoB10andR674respectively.ResistantallelesatbothgenelociwerederivedfromGumei2,indicatinganexistenceofresistancegeneclusterinGumei2.

简介：到在米饭germplasm91-1A2的米饭胆量小蚊的抵抗被识别并且遗传上分析了。米饭人口的F1s从作为一个男父母与米饭材料Jinggui，TN1，W1263(Gm1)，IET2911(Gm2)，BG404-1(gm3)，OB677(Gm4)，ARC5984(Gm5)和Duokang1(Gm6)交叉的91-1A2被导出。到米饭胆量小蚊的所有父母线和F1，BC1F1和F2人口的抵抗被识别。结果证明91-1A2和所有F1s对中国米饭胆量小蚊遗传因子型IV抵抗。到在BC1F1和F2的易受影响的抵抗植物的分离比率被X2测试与1:3和9:7规则给予，建议到中国米饭胆量小蚊遗传因子型IV的91-1A2的抵抗被是新抵抗基因的二主导的基因控制，对已知的米饭胆量小蚊抵抗基因非突变而产生之遗传因子。

简介：Thetransgenicrice,Zhongda2,whichwasgeneticallymodifiedfromanindicaricelineZhuxianBbyricechitinasegene(RC24),hadhighresistancetoricesheathblight(Rhizoctoniasolam)inlaboratoryandatwo-yearfieldexperiment.ThepathogencouldinvadesheathofZhongda2andinducesymptomsofthedisease.NodifferencewasnotedintimeofpenetrationorincubationperiodbetweenZhongda2andnon-transgenicricecontrol,ZhuxianB,butthehyphaelysatecouldbeobservedeadierthancontrol.Itsresistanceexpressedastoinhibitthegrowthofmyceliuminhosttissue.F1sfromZhongda2(♂)crossedwithotherfivenon-transgenicricelinesshowedhigherresistancethandonornon-transgenicparents,buttheresistancewasdifferentalongwiththedifferentmaternalparents.

简介：Smallubiquitin-likemodifier(SUMO)-conjugatingenzymesareinvolvedinpost-translationalregulatoryprocessesineukaryotes,includingtheconjugationofSUMOpeptidestoproteinsubstrate(SUMOylation).SUMOylationplaysanimportantroleinimprovingplanttolerancetoabioticstresssuchassalt,drought,heatandcold.Herein,wereportedtheisolationofOsSCE1(LOC_Os10g39120)geneencodingaSUMO-conjugatingenzymefromrice(Oryzasativacv.Nipponbare)anditsfunctionalvalidationinresponsetodroughtstress.TheE2enzyme,OsSCE1,isoneofthreekeyenzymesinvolvedintheconjugationofSUMOtoitstargetproteins.ActivatedSUMOistransferredtothecysteineofanE2enzymeandthentothetargetlysineresidueofthesubstrate,withorwithoutthehelpofanE3SUMOligase.ExpressionofOsSCE1wasstronglyinducedbypolyethyleneglycol6000(PEG6000)treatment,whichsuggestedOsSCE1maybeinvolvedinthedroughtstressresponse.OverexpressionofOsSCE1(OsSCE1-OX)inNipponbarereducedthetolerancetodroughtstress.Conversely,thedroughttolerancewasslightlyimprovedbytheknockdownofOsSCE1(OsSCE1-KD).TheseresultswerefurthersupportedbymeasurementofprolinecontentinOsSCE1-OXandOsSCE1-KDtransgeniclinesunderinduceddroughtstress,whichshowedOsSCE1-KDtransgeniclinesaccumulatedhigherprolinecontentthanthewildtype,whereasOsSCE1-OXlinehadlowerprolinecontentthanthewildtype.ThesefindingssuggestedOsSCE1mayplayaroleasanegativeregulatorinresponsetodroughtstressinrice.

简介：Bacterialleafblightofrice(BLB),causedbyXanthomonasoryzaepv.oryzae,isoneofthemostdestructivediseasesinAsianricefields.Ahigh-qualityricevariety,LT2,wasusedastherecipientparent.IRBB21,whichcarriestheXa21gene,wasusedasthedonorparent.TheresistancegeneXa21wasintroducedintoLT2bymarker-assistedbackcrossing.ThreeXooraceswereusedtoinoculatetheimprovedlinesfollowingtheclippingmethod.ElevenBC3F3linescarryingXa21wereobtainedbasedonmolecularmarkersandagronomicperformance.The11linesweretheninoculatedwiththethreeXooraces.Allthe11improvedlinesshowedbetterresistancetoBLBthantherecipientparentLT2.BasedonthelevelofresistancetoBLBandtheiragronomicperformance,fivelines(BC3F35.1.5.1,BC3F35.1.5.12,BC3F38.5.6.44,BC3F39.5.4.1andBC3F39.5.4.23)wereselectedasthemostpromisingforcommercialrelease.Theseimprovedlinescouldcontributetoriceproductionintermsoffoodsecurity.

简介：布朗planthopper(Nilaparvatalugens圣?l)大多数损坏害虫之一在米饭正在引起hopper灼伤，并且从而减少生产率并且另外产品的质量。控制这个害虫的有效管理策略是到本地米饭栽培变种的理想的基因的鉴定和转移。为开发抵抗栽培变种的最重要的途径是标记的鉴定，它能在更持久的抵抗遗传型的帮助标记的选择帮助。易受影响的父母IR50和抵抗父母Ptb33，和他们的F2人口是为有随机的放大多态的DNA的抵抗基因的鉴定的使用的inbulkedsegregant分析标记(RAPD)教材。教材OPC7和OPAG14证明主导、易受影响的特定的banding模式那么叫了co主导的标记。而且，OPC7697和OPAG14680给抵抗特定的乐队看了并且因此在联合分阶段执行，而OPC7846和OPAG14650给易受影响的特定的genotypic乐队看了inbulkedsegregant分析。因此，联合阶段标记，OPC7697和OPAG14680，被认为在在庄稼改进的米饭遗传型的帮助标记的选择更有用。