Maddock M B, Chang M C
J Exp Zool. 1979 Sep;209(3):417-26. doi: 10.1002/jez.1402090307.
Mating, fertilization, implantation, prenatal mortality, fetal and placental size, and placental ultrastructure were studied in intraspecific and interspecific crosses involving Peromyscus maniculatus and P. polionotus. Failure to mate was a major factor in interspecific crosses and was much more pronounced in crosses between P. polionotus females and P. maniculatus males than in the reciprocal cross. Failure of implantation following mating, however, was more pronounced in crosses between P. maniculatus females and P. polionotus males. Failure of implanted embryos to survive to term was a factor in crosses between P. polionotus females and P. maniculatus males. Comparison of the placental labyrinth of conceptuses from intraspecific and interspecific crosses revealed no differences at the ultrastructural level. The relationship of these observations to the evolution of isolating mechanisms in mammals and to physiological aspects of the developing maternal-fetal relationship are discussed. A model of placental and fetal size inheritance is presented.
在涉及鹿鼠（Peromyscus maniculatus）和佛罗里达白足鼠（P. polionotus）的种内和种间杂交中，对交配、受精、着床、产前死亡率、胎儿和胎盘大小以及胎盘超微结构进行了研究。无法交配是种间杂交中的一个主要因素，在佛罗里达白足鼠雌性与鹿鼠雄性的杂交中比在反交中更为明显。然而，交配后着床失败在鹿鼠雌性与佛罗里达白足鼠雄性的杂交中更为明显。植入的胚胎未能存活至足月是佛罗里达白足鼠雌性与鹿鼠雄性杂交中的一个因素。种内和种间杂交的孕体胎盘迷路在超微结构水平上没有差异。讨论了这些观察结果与哺乳动物隔离机制进化以及发育中的母胎关系生理方面的关系。提出了一个胎盘和胎儿大小遗传的模型。
