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.

摘要同型孢蕨类的孢可经由同自交、异交两类育系统或以无生殖的生，异交又可分为异自交和异异交两种。