ToinvestigategeneticpersitiesamongtheAAgenomeOryzaspeciesintheSoutheastandSouthAsia,atotalof428accessionsoftheAAgenomeOryzaspeciesweregenotypedusing36simplesequencerepeats(SSR)markersdistributedthroughoutthericegenome.Allofthe36SSRmarkersgeneratedpolymorphicbands,revealing100%polymorphism.Thenumberofallelesperlocusrangedfrom3to17withthemeanof8.6.TheNei’sgeneticpersityindex(He)rangedfrom0.337atRM455to0.865atRM169withanaveragevalueof0.650.ThegeneticpersityoftheAAgenomeOryzaspeciesintheSoutheastAsiawasobviouslyhigherthanthatintheSouthAsia.AmongthedetectedOryzaspeciesintheSouthandSoutheastAsia,O.rufipogonshowedthehighestgeneticpersity.Meanwhile,ahighergeneticdifferentiation(Fst)wasfoundamongthedetectedOryzaspeciesintheSoutheastAsiathanintheSouthAsia.TheFstvaluebetweenO.nivaraandO.sativawasthehighest.Theresultsfromthenumberofspecificalleles,specificloci,andallelefrequencyconfirmedthegreatergeneticvariationamongthedetectedspecies.Inaddition,thespecificalleleinRM161displayedhigherfrequency(0.193),suggestingitsimportantfunctioninidentifyingOryzaspeciesofAAgenome.
