简介：Whitebackedplanthopper(WBPH)-resistanceinajaponica/indicadoubledhaploid(DH)ricepopulationestablishedfromacrossbetweenWBPH-resistantjaponicaChunjiang06andsusceptibleindicaTN1,wascomparativelyevaluatedthroughafieldexperimentbasedontheWBPHimmigrantdensityandstandardizedseedboxscreeningtest(SSST).AllthesusceptibleDHlinesinthefieldexperimentbehavedaccordinglyinSSST.However,35ofresistant66lines(53%)inthefield,werecategorizedtosusceptiblegroupsinSSST.Likewise,therewerenosignificantdifferencesinWBPHimmigrantdensitiesamong70DHlinesthatwerehighlyresistanttosusceptibleinSSST.TheresultsrevealedthatSSSTcouldnotevaluateproperlyWBPHresistanceintheDHlines.FourQTLsforWBPH-resistancephenotypedbytheimmigrantdensityweredetectedonchromosomes2,3,4,and11.Ofthem,theQTLonchromosome4wasthemosteffective(LOD21.8,variance78%).FiveQTLsassociatedwithseedlingmortalityweremappedonchromosomes2,3,4,5and6.InadditiontotheQTL(LOD10.5,variance68%)onchromosome4,therewasanothermajorQTL(LOD12.7,variance71%)locatedonchromosome5,whichwasSSST-specificbutmightbeirrespectiveoftheWBPHresistancetraits.

简介：Race-specificresistanceandfieldresistanceof30riceblastresistancemonogeniclinesderivedfromdifferentresourceswereevaluated.Thespectraofresistanceto163MagnaporthegriseaisolatescollectedfromindicariceinGuangdongProvince,Chinarangedfrom0.6%to89.6%.Mostofthemonogeniclinesshowedanarrowresistancespectrumandhighsusceptibilityinriceblastarea,whereasthelineswithPikhandPi1(t)hadthebroadresistancespectraof89.6%and82.2%respectively,showingahighandstableblastresistanceinfields.Accordingtotheclusteranalysisofspecificresistanceto163blastisolatestested,the30monogeniclinesweredividedinto15groups,andbasedontheprincipalfactoranalysis,ninekindsofrace-specificresistancewereidentified.Pik,Piz5,Pi9andPishcanbeusedascandidateresistancegenesforricebreedingsincetheirspecificresistancedifferedfromthoseofthebackboneparentsinGuangdong,China.GenepyramidingofPikh[orPi1(t)],Pi9(orPiz5)andPish(orPita2)willbeeffectivetoobtainbroad-spectrumblastresistanceinricebreedingprograminGuangdong,China.Thestrategiesforstudyingandapplicationofriceblastresistancegeneswerediscussed.

简介：Blacklocust(RobiniapseudoacaciaL.)wasthefirstNorth-AmericantreespeciesimportedtoEuropeatthebeginningoftheseventeenthcentury.Itiscommonlyplantedworldwidebecauseofitsadaptabilitytoenvironmentalstresses,itsvaluablewood,easypropagation,frequentandabundantseedproduction,excellentcoppicing,highseedlingsurvival,andrelativelyhighwoodyield.InEurope,RomaniaandHungaryhavethemosthighly-developedblacklocustgrowingtechniquesandexperiences.Asaresultofincreasinginterestinblacklocustinmanycountries,thisreviewaimstoprovideacomprehensiveoverviewofstate-of-the-artsiterequirements,propagation,improvementandmanagement(includinggrowthandyieldaswellasuseinenergyplantations).

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简介：Globalclimatechangeposesnewopportunitiesandchallengesforforestrydevelopment,andthereforedevelopingmultiple-purposeforestryisanimportantmeasuretostrengthenforestryresponsetoclimatechange.Atpresent,plantationinChinarankstheworldfirstinarea,butwithrelativelylowproductivity.Constantlyexpandingforestareaandimprovingforestmanagementforenhancingmultiplefunctionsandpurposesofplantationsarethekeymeasurestoupgradeplantationcapacitytomitigateandadap...

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：在米饭restorer线C224的条纹疾病抵抗的继承为量的特点加多基因用主要基因的混合效果模型被分析。另外，抵抗与维护者线在C224的七个十字被调查。结果证明C224的条纹抵抗被二主要基因与添加剂优势效果(E-1模型)加多基因与additive-dominance-epistasis效果控制。这二基因有12.47%和24.75%分别地，出现的否定优势效果的添加剂效果。在二主要基因之间有重要epistasis和相互作用效果。当多基因的是2.74%时，二主要基因的可遗传性是92.12%，显示条纹抵抗有主导的主要基因效果。七个十字，五显示了高或中等的抵抗到条纹疾病。

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。