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

大关于种园理论，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体可经由同体自交、体交两类育系统或以无生殖的方式产生，体交又可分为体自交和体交两种方式。