[Obtaining chimeric embryos of groundling for study of the role of cellular interactions in early development]

A methos of production of chimaeric embryos of the loach by parabiosis of whole embryos and a whole embryo and an isolated blastodisc is proposed. The parabiosis was shown to be possible between the embryos of both the same and different ages during cleavage and blastulation. The relation between the frequency of parabiosis and the age of embryos and temperature was studied. An electric coupling is established between the cells of parabionts, similar by its value to that between the cells of each parabiont. The interrelations of cells of chimaeric embryos are considered as a model for studying the role of cell interactions during embryogenesis.