简介：因为它的高收益潜力，到边缘的地点的改编，和忍耐，Switchgrass(PanicumvirgatumL.)作为持续bioenergy庄稼被建议了到水和滋养的限制。生物资源精力庄稼生产的潜在的效果的更好的理解在土壤上练习生物性质，有机物动力学对它的生产批评。我们的目的在学院车站，达拉斯，和Stephenville是与成长得典型地的庄稼相比在不同土壤在温暖季节的长期的switchgrass下面在C水池评估变化镇定的，在2001年2月的TX。采样深度是05，515，和1530厘米。Switchgrass增加了土壤器官的C(SOC)，玷污微生物引起的生物资源C(SMBC)，mineralizableC，和与常规收割相比的微粒有机物C(POM-C)系统。土壤C集中在顺序：长期的沿海的bermudagrass[Cynodondactylon(L.)Pers.]switchgrass1997>常规收割系统。土壤C集中趋于与增加泥土内容增加。更大的微生物引起的生物资源C跟随了达拉斯的顺序>学院车站>Stephenville，并且在达拉斯在Stephenville从约180mgCkg1土壤到1900mgCkg1土壤。微粒器官的C比对管理的另外的部分更敏感，像在与常规收割系统相比的长期的沿海的bermudagrass下面的6褶层一样增加。我们的学习显示进switchgrass生产的常规收割系统的变换能扣押更多的SOC并且改进土壤在南部的美国的生物性质。

简介：ThaijasminericeKDML105isconsumedaroundtheworld.BKOS,PKOSandTKOSarenewcultivarsproducedfromlow-energyionbeaminductioninKDML105.ThepurposeofthisstudyistocomparethemorphologyandanatomybetweenKDML105andthethreenewcultivars.Seedsofthefourcultivarsweregerminatedandgrowninpotsuntilfloweringphase.Theplants'organswereobservedandthelengthsofculms,ligules,leavesandpaniclesweremeasured.Leafsurfaceareawascalculatedandnumbersofroots,spikeletsandtillerswerecounted.BKOSandPKOShadsignificantlyshorterculmsthanKDML105andTKOS.ThelargestleafareawasfoundinKDML105followedbyTKOS,BKOSandPKOS,respectively.NumbersofrootsandtillersinBKOSandTKOSweresignificantlyfewerthanthoseinKDML105andPKOS.ThenumberofspikeletsperplantinBKOSwasthelowestamongallcultivars.Foranatomicalcomparison,crosssectionsofculmsandrootswereobserved.Allplantshadasimilararrangementoftissues,butthenumberandsizeofcellsweredifferent.Furthermore,longitudinalsectionsofculmsshowedthatthelengthsofepidermalandparenchymacellsweredirectlyrelatedwiththelengthoftheculm.Tocomparetheleaves,bothstomataandepidermalcellswerecountedandthelengthsoftheguardcellsweremeasured.ThelengthsofguardcellsofBKOSandPKOSwereshorter,butthestomataldensityandthestomatalindexweresignificantlygreaterthanthoseofKDML105.ForTKOS,thoughthelengthofguardcellswasshorterthanthatinKDML105,thedifferencewasnotsignificant.However,thestomataldensityandstomatalindexweresignificantlyhigherthanthoseinKDML105.

简介：Nearisogeniclinescarryinglarge-effectQTL(qtl12.1),whichhasaconsistentinfluenceongrainyieldunderuplanddroughtstressconditionsinawiderangeofenvironments,wereevaluatedunderwaterstressinthefields.Thelinewhichgavehigheryieldunderdroughtwascrossedwithalocaleliteline,PMK3,andforwardedtoF2:3generation.SignificantvariationwasfoundamongtheF2:3linesforagronomictraitsunderwaterstressinthefields.Lowtohighbroadsenseheritability(H)forinvestigatedtraitswasalsofound.Waterstressindicatorssuchasleafrollingandleafdryingwerenegativelycorrelatedwithplantheight,biomassandgrainyieldunderstress.Bulkedsegregantanalysis(BSA)wasperformedwiththemarkersinthevicinityofqtl12.1,andRM27933wasfoundtobesegregatedperfectlywellinindividualcomponentsofdroughtresistantanddroughtsusceptiblebulkswhichwerebulkedbasedonyieldunderwaterstressamongF2:3lines.Hence,thissimpleandbreederfriendlymarker,RM27933,maybeusefulasapotentiallyvaluablecandidatemarkerforthetransferoftheQTLqtl12.1intheregionalbreedingprogram.BioinformaticanalysisoftheDNAsequenceoftheqtl12.1regionwasalsodonetoidentifyandanalyzepositionalcandidategenesassociatedwiththisQTLandtoascertaintheputativemolecularbasisofqtl12.1.