Under the same culture condition, nest-like colonies were observedonly from l9dpc and 2odpc fetuses in SBR and DEB rabbits when rabbit PGCs were seededonto homologous feeder layers.

• 19-20dpc塞北兔和大耳白兔胎儿与同期的新西兰大白兔胎儿相比，由PGCs建成的EG细胞系在相同培养条件下易于分化。