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1、PhysiologiaPlantarum2013©2013ScandinavianPlantPhysiologySociety,ISSN0031-9317Geneticvariation,heritability,divergenceandbiomassaccumulationofricegenotypesresistanttobacterialblightrevealedbyquantitativetraitsandISSRmarkersMuhammadS.Mazida,MohdY.Rafiia,b,∗,MohamedM.Hanafia,HarunA.Rahimcand
2、MdAbdulLatifb,daInstituteofTropicalAgriculture,UniversitiPutraMalaysia,43400UPMSerdang,Selangor,MalaysiabDepartmentofCropScience,FacultyofAgriculture,UniversitiPutraMalaysia,3400UPM,Serdang,Selangor,MalaysiacAgrotechnologyandBioscienceDivision,MalaysianNuclearAgency,Bangi43000,Kajang,Se
3、langor,MalaysiadPlantPathologyDivision,BangladeshRiceResearchInstitute,Gazipur,BangladeshCorrespondenceAfieldexperimentwascarriedoutinordertoevaluategeneticdiversityof*Correspondingauthor,41ricegenotypesusingphysiologicaltraitsandmolecularmarkers.Allthee-mail:mrafii@putra.upm.edu.mygenoty
4、pesunveiledvariationsforcropgrowthrate(CGR),relativegrowthrate(RGR),netassimilationrate(NAR),yieldperhill(Yhill−1),totaldrymatterReceived3October2012;revised22February2013(TDM),harvestindex(HI),photosyntheticrate(PR),leafareaindex(LAI),chlorophyll-aandchlorophyll-batmaximumtilleringstag
5、e.TheCGRvaluesdoi:10.1111/ppl.12054variedfrom0.23to0.76gmcm−2day−1.TheYhill−1rangedfrom15.91to92.26g,whileTDMvaluewasintherangeof7.49to20.45ghill−1.PRwasfoundtovaryfrom9.40to22.34μmolm−2s−1.PRexpressedpositiverelationwithYhill−1.SignificantpositiverelationwasfoundbetweenCGRandTDM(r=0.61*
6、*),NARandCGR(r=0.62**)andbetweenTDMandNAR(r=0.31**).HighheritabilitywasfoundinRGRandYhill−1.Clusteranalysisbasedonthetraitsgrouped41ricegenotypesintosevenclusters.Atotalof310polymorphiclociweredetectedacrossthe20inter-simplesequencerepeats(ISSR)markers.TheUPGMAdendrogramgrouped41ricegen
7、otypesinto11clustersincludingseveralsub-clusters.TheManteltestrevealedpositivecorrelationbetweenquantitativetraitsandmolecularmarkers(r=0.41).Onthebasisofquantitativetraitsandmolecularmarkeranalysesparentalgenotypes,IRBB54withMR84,IRBB60withMR84,PurbachiwithMR263,IRBB65withBR29
