Abstract: Meiosis and microsporegenesis were studied in Diospyros kaki L.cv.“Zenjimaru”(2n=6x=90).Pairing and segregation were essentially normal and there were 45 bivalents in PMCs at matephase I.But some pseudo multivalents(bivalents secondarily associated) were observed.Moreover,ameiosis was still observed.The unreduced nucleus became a dyad in the stage of pollen tetrad and a large pollen grain in the stage of microspore.These phenomena show the possibility of producing polyploid of Diospyros kaki L.by the unreduced gametes.