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简介：China'seasternareaisatmiddleandlaterstageofindustrializationduringwhichtherelationbetweenurbanandruralareas,industryandagricultureappearsmaladjusted.Themainproblemsareshrinkageinagriculturalcomparativeearningandlackofdrivingforceofagriculturaldevelopment.BasedoncalculatingagriculturallaborproductivityineastChinafrom1996to2005,thispaperanalyzescontributingdegreeofmotiveforcesofagriculturedevelopintenprovincesandcitiesofeastChinaapplyingGCA(Greycorrelativeanalysis).TheresultsshowthatthereisnoabsolutecorrespondencebetweenthelevelofindustrializationandagriculturallaborproductivityinChina'seasternarea.Thereisnosynchronousdevelopmentbetweenindustryandagriculturallaborproductivityinsomeareas.Fertilizerandagriculturalmachineryinputhadhighcontributingdegreefortenyears;however,contributingdegreeinlandandirrigationworkinputwaslow.Non-materializationinputsbecametheleadingroleinmostprovincesandcities'increaseofagriculturallaborproductivity.Modernagriculturaldevelopmentneednon-materializationinputsasprimarymotiveforce,atthesametime,directmaterialinputandfacilityinputasguaranteedfunction.Forsomereasons,agriculturaldevelopmentischaracterizedby'moredirectmaterialinput,lessfacilityinput'ineastChinanow.OptimaldrivingforcemodeloffutureagriculturaldevelopmentineastChinaisthatnon-materializationinputsaredominant,thatperfectedfacilityinputareguarantee,andthatcertainsubstanceinputsarenecessary.

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简介：Assessmentofgeneticdiversityisanessentialcomponentingermplasmcharacterizationandconservation.TherearethreewildricespeciesinHainanProvince,includingOryzarufipogonGriff.InordertodetectthegeneticdiversityofdifferentpopulationsofOryzarufipogoninHainan,ISSR(inter-simplesequencerepeat)andSSR(simplesequencerepeat)markerswereusedtoinvestigate180accessionsfromsixlocalitiesinHainan.FourteenISSRprimersamplified185alleleswith171(92.43%)polymorphic,thenumberofallelesrangedfrom8to17,withanaverageof13.14allelesperlocus.Thirty-eightpairsofSSRprimersusedinthisstudyamplified213alleleswith190(89.20%)polymorphic,thenumberofallelesrangedfrom2to14,withanaverageof5.66allelesperlocus.BothISSRandSSRanalysesrevealedahighlevelofgeneticdiversityinthewildpopulations.ThepopulationwiththehighestgeneticdiversityisWanning(WN),andthepopulationwithlowestgeneticdiversityisWenchang(WC).TheresultsofaUPGMAclusterusingtheNTSYSprogramshowedthateachpopulationhasalowdegreeofgeneticdifferentiation.Furthermore,theManteltestrevealedthatthegeneticsimilaritiesdetectedbyISSRandSSRweresignificantlycorrelated(r=0.8634,t=93.67)whendetectinggeneticdiversityatthespecieslevel.ThetwomolecularmarkersystemswereabletodeterminethegeneticdiversityamongOryzarufipogon,andthetwogroupsofindexesobtainedbyusingthetwomarkershaveahighlevelofconsistency.