ploidy

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.

摘要同型孢子蕨类的孢子体可经由同子体自、异子体类系统生殖的方式产生，异子体又可分为异子体自和异子体异种方式。