title: Karyotype evaluation among young horse populations in Poland.
abstract: Five hundred young horses of the following breeds: Thoroughbred, Silesian, Malopolska, Wielkopolska, Polish Konik, Hutsul, Shetland Pony, Half-bred Anglo-Arabian, Noble Half-bred, Fjord and crosses were cytogenetically investigated. Chromosome preparations obtained after lymphocyte culture were analysed using conventional Giemsa staining and CBG-banding methods. In the case of abnormalities GTG-banding as well as FISH technique were applied. In ten mares different karyotypic abnormalities were diagnosed. One mare showed chromosome chimerism (64,XX/64,XY), eight had sex chromosomal aneuploidy (one in pure line 63,X and seven in mosaic form 63,X/64,XX) and one presented autosomal aneuploidy with mosaicism (64,XX/65,XX,+31). The influence of sex chromosome abnormalities on fertility and the possible utilisation of karyotypic control in any selection programme are discussed.
authors.affiliation: Department of Immuno- and Cytogenetics, National Research Institute of Animal Production, Balice, Krakow, Poland. mbugno@izoo.krakow.pl
authors.forename: M
authors.initials: M
authors.lastname: Bugno
authors.forename: E
authors.initials: E
authors.lastname: Słota
authors.forename: M
authors.initials: M
authors.lastname: Kościelny
mesh_terms: D000818:Animals; D001947:Breeding; D002869:Chromosome Aberrations / Q000706:statistics & numerical data / Q000662:veterinary*; D005260:Female; D006736:Horses / Q000235:genetics*; D017404:In Situ Hybridization, Fluorescence / Q000662:veterinary; D007621:Karyotyping / Q000662:veterinary*; D008297:Male; D011044:Poland; D012729:Sex Chromosome Aberrations / Q000662:veterinary