intra-

Homosporous ferns produce sporophytes by intra gametophytic selfing, inter gametophytic mating, or apogamy.Gametangium ontogeny, genetic load, and ploidy affect the mating system of each species.

摘要同型孢子孢子体可经由同配子体自交、配子体交配两配系统或以无配生殖方式产生，配子体交配又可配子体自交和配子体交两种方式。