title: Live haploid-diploid and other unusual mosaic chickens (Gallus domesticus).
abstract: Sixteen haploid-diploid chickens, four diploid-triploids, and one haploid-diploid-triploid chicken have been found in a layer line of crossbred origin. Live haploid-euploid vertebrates have not been reported previously. Flow cytometric analysis revealed 1-80% haploid red blood cells (RBCs) in the haploid-euploid chickens and 5-30% triploid RBCs in the diploid-triploids. Mosaic cell lines were also found in leukocytes and many tissues. The haploid-diploid chickens were all phenotypically normal and fertile, but the phenotype and fertility of the diploid-triploid chickens depended on their sex-chromosome complements and the ratio of diploid to triploid cells. The haploid cell lines are thought to originate from supernumerary spermatozoa, and the diploid-triploids from binucleated oocytes with meiotic errors. It is likely that genetic factors are partly responsible for the occurrence of these mosaic chickens.
authors.forename: M H
authors.initials: MH
authors.lastname: Thorne
authors.forename: R K
authors.initials: RK
authors.lastname: Collins
authors.forename: B L
authors.initials: BL
authors.lastname: Sheldon
mesh_terms: D000818:Animals; D002645:Chickens / Q000235:genetics*; D003433:Crosses, Genetic; D005819:Genetic Markers; D007621:Karyotyping; D009030:Mosaicism; D011003:Ploidies
chemical_list: D005819:Genetic Markers