The Research of the Origin and the Diversification of Apogamy Species in the Pteridophyte

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The reproduction brings large influence in the evolution process of the bio-mechanism of the speciation. It was reported that most Pteridophyte performed the apogamy other than normal sexual reproduction. It is important to study about the speciation and diversity process of the apogamy for clarifying 「species」 variety of the Pteridophyte. In this study, it was clarified that the fern plants of Dryopteris erythrosora produced different polyploidy spores by inequality reduction division and the archegonia were formed in apogamy prothallia. It was proofed that the Pteridophyte perform complex diversity mechanism for taking in genetic variation based on reproductive processes such as inequality cell division, the hybridization origin.