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

大多数关园理论，是以假定能发生随机交配和花受精而不会成为重问题为依据的。

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配交、异配交配两类配育系统或以无配生殖的方式产生，异配交配又可分为异配交和异配异交两方式。