Abstract
Blood was collected from Stage 13 to 14 (1) chick embryos. Primordial germ cells (PGCs) were separated from blood cells by Ficoll density gradient centrifugation. One hundred Rhode Island Red PGCs per embryo were transferred to the blood stream of Stage 14 to 15 White Leghorn embryos. Also, one hundred White Leghorn PGCs per embryo were transferred to the blood stream of Stage 14 to 15 Rhode Island Red embryos. Hatched male and female chicks were raised until sexual maturity, and progeny tests were performed by mating these PGC recipients with Rhode Island Red chickens of the opposite sex. Chicks apparently derived from the transferred PGCs, based on the feather color of the chicks, were produced from all 4 possible mating combinations. The present results indicate that the germ line of PGC recipient chickens consists of 2 distinct populations of germ cells.
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