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

繁殖对物种形成的生物机制的进化过程产生了重大影响。据报道，大多数蕨类植物除了正常的有性生殖外，还进行了单配交配。研究无杂交的物种形成和多样性过程对阐明蕨类植物的“种”多样性具有重要意义。本研究阐明了红鳞毛蕨（Dryopteris erythrosora）的蕨类植物通过不等减数分裂产生不同的多倍体孢子，并在单配生殖中形成了原胚。结果表明，蕨类植物通过细胞不平等分裂、杂交起源等生殖过程，发挥了复杂的遗传多样性机制。

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.