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.

摘要同型孢的孢可经由同自交、异交两育统或以无生殖的方式产生，异交又可分为异自交和异异交两种方式。

Most seed orchard theory is based on the assumption that panmixis will occur and that selfing will not be a serious problem.

大多数关于种园理论，是以假定能发生随机交和自花受精而不会成为严重问题为依据的。