The Polymorphism of Cytogenetic Markers in the Farm and Wild-Living Raccoon Dog (Nyctereutes Procyonoides) / Polimorfizm Markerów Cytogenetycznych U Jenota (Nyctereutes Procyonoides) W Populacjach Hodowlanych I Dziko Żyjących

Open access

Abstract

The raccoon dog (Nyctereutes procyonoides) is a mammalian species that belongs to Canidae family, order Carnivora. This species represents both animals living in the wild and farm animals used in the fur industry. Raccoon dogs have the most ‘primitive’ karyotype among Canidae family. The Chinese raccoon dog (Nyctereutes procyonoides procyonoides) is characterised by a variable number of chromosomes (2n = 54 + 0-4 B). B chromosomes are supernumerary chromosomes occurring in addition to the basic set of A chromosomes in the cells of many organisms. The function and origin of these additional chromosomes is not clear. The aim of this work was to determine possible karyotypic differences between wild-living and farm populations, using methods of classical and molecular cytogenetics. The most useful cytogenetic markers to analyse karyotype polymorphism of canine are the number of B chromosomes and nucleolar organizer regions. A variation was identified in the number of B chromosomes and nucleolar organizer regions (NORs) in cells between wild-living and breeding populations.

Streszczenie

Jenot (Nyctereutes procyonoides) jest gatunkiem ssaka zaliczanym do rodziny psowatych (Canidae), rzędu drapieżne (Carnivora). Gatunek ten reprezentuje zarówno zwierzęta wolno żyjące, jak i hodowlane, wykorzystywane w przemyśle futrzarskim. Posiada najbardziej prymitywny kariotyp wśród psowatych. Jenot chiński (Nyctereutes procyonoides procyonoides) charakteryzuje się zmienną liczbą chromosomów 2n = 54+ 0-4 B. Chromosomy B są chromosomami nadliczbowymi, występującymi oprócz podstawowego zestawu chromosomów A w komórkach wielu organizmów. Nie są znane ich funkcja ani pochodzenie. Badania miały na celu określenie różnic, jakie mogą występować na poziomie chromosomowym między populacjami dziko żyjącymi i hodowlanymi, z wykorzystaniem metod cytogenetyki klasycznej i molekularnej. Zaobserwowano polimorfizm w liczbie chromosomów B i regionów jąderkotwórczych (NOR) w komórkach pomiędzy populacjami dziko żyjącymi i hodowlanymi.

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Annals of Animal Science

The Journal of National Research Institute of Animal Production

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