title: [Regulation of the number of gonocytes in the genital ridges of duck embryos after partial destruction of the initial stock of germ cells].
abstract: X rays irradiation of anterior or posterior halves of Duck blastoderms at the non incubated stage is followed by a decrease of the number of germ cells in the germinal crescent at the stage of 10 somites. However, after 6 days of incubation, the genital ridges of such embryos contain the same number of gonocytes as those of normal embryos. A regulation of the number of gonocytes occures at the level of the genital ridges.
mesh_terms: D000367:Age Factors; D000818:Animals; D001756:Blastoderm / Q000528:radiation effects; D004307:Dose-Response Relationship, Radiation; D004372:Ducks; D005854:Germ Cells; D006066:Gonads / Q000166:cytology / Q000196:embryology*; D011830:Radiation Effects; D014965:X-Rays
vernacular_title: Régulation du nombre des gonocytes dans les ébauches gonadiques de l'embryon de Canard après destruction partielle du stock initial des cellules germinales