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Genetic differentiation between the Old and New types of Serbian Tsigai sheep

Two Tsigai sheep populations exist in Serbia: the Old type, called Čokan, and the New type. It is assumed that the New type results from upgrading Tsigai sheep with exotic genetic material. We investigated genetic diversity and differentiation of these types by analysing 23 autosomal microsatellites...

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Autores principales: Ćinkulov, Mirjana, Tapio, Miika, Ozerov, Mikhail, Kiselyova, Tatyana, Marzanov, Nurbiy, Pihler, Ivan, Olsaker, Ingrid, Vegara, Mensur, Kantanen, Juha
Formato: Texto
Lenguaje:English
Publicado: BioMed Central 2008
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2674905/
https://www.ncbi.nlm.nih.gov/pubmed/18400153
http://dx.doi.org/10.1186/1297-9686-40-3-321
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author Ćinkulov, Mirjana
Tapio, Miika
Ozerov, Mikhail
Kiselyova, Tatyana
Marzanov, Nurbiy
Pihler, Ivan
Olsaker, Ingrid
Vegara, Mensur
Kantanen, Juha
author_facet Ćinkulov, Mirjana
Tapio, Miika
Ozerov, Mikhail
Kiselyova, Tatyana
Marzanov, Nurbiy
Pihler, Ivan
Olsaker, Ingrid
Vegara, Mensur
Kantanen, Juha
author_sort Ćinkulov, Mirjana
collection PubMed
description Two Tsigai sheep populations exist in Serbia: the Old type, called Čokan, and the New type. It is assumed that the New type results from upgrading Tsigai sheep with exotic genetic material. We investigated genetic diversity and differentiation of these types by analysing 23 autosomal microsatellites. Tests for Hardy-Weinberg proportions, linkage equilibrium between genotypes across loci and the calculation of inbreeding coefficients were performed and the deficiency in the number of alleles within the Tsigai types was examined using a Wilcoxon sign-rank test. The New type displayed a higher level of genetic variability than the Čokan in terms of allele numbers, but the New Tsigai showed a pattern of heterozygosity deficiency. The positive f value for the Čokan suggests the occurrence of inbreeding in this type. The proportion of linkage disequilibrium was below that expected by chance. Exclusion of two loci in Hardy-Weinberg disequilibrium did not alter our conclusions based on the entire data set i.e. the two Tsigai types are clearly differentiated and the New Tsigai type has been influenced by crossbreeding. Therefore, the Čokan Tsigai should be considered as a distinct endangered breed in the FAO classification.
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spelling pubmed-26749052009-04-30 Genetic differentiation between the Old and New types of Serbian Tsigai sheep Ćinkulov, Mirjana Tapio, Miika Ozerov, Mikhail Kiselyova, Tatyana Marzanov, Nurbiy Pihler, Ivan Olsaker, Ingrid Vegara, Mensur Kantanen, Juha Genet Sel Evol Research Two Tsigai sheep populations exist in Serbia: the Old type, called Čokan, and the New type. It is assumed that the New type results from upgrading Tsigai sheep with exotic genetic material. We investigated genetic diversity and differentiation of these types by analysing 23 autosomal microsatellites. Tests for Hardy-Weinberg proportions, linkage equilibrium between genotypes across loci and the calculation of inbreeding coefficients were performed and the deficiency in the number of alleles within the Tsigai types was examined using a Wilcoxon sign-rank test. The New type displayed a higher level of genetic variability than the Čokan in terms of allele numbers, but the New Tsigai showed a pattern of heterozygosity deficiency. The positive f value for the Čokan suggests the occurrence of inbreeding in this type. The proportion of linkage disequilibrium was below that expected by chance. Exclusion of two loci in Hardy-Weinberg disequilibrium did not alter our conclusions based on the entire data set i.e. the two Tsigai types are clearly differentiated and the New Tsigai type has been influenced by crossbreeding. Therefore, the Čokan Tsigai should be considered as a distinct endangered breed in the FAO classification. BioMed Central 2008-05-15 /pmc/articles/PMC2674905/ /pubmed/18400153 http://dx.doi.org/10.1186/1297-9686-40-3-321 Text en Copyright © 2008 INRA, EDP Sciences
spellingShingle Research
Ćinkulov, Mirjana
Tapio, Miika
Ozerov, Mikhail
Kiselyova, Tatyana
Marzanov, Nurbiy
Pihler, Ivan
Olsaker, Ingrid
Vegara, Mensur
Kantanen, Juha
Genetic differentiation between the Old and New types of Serbian Tsigai sheep
title Genetic differentiation between the Old and New types of Serbian Tsigai sheep
title_full Genetic differentiation between the Old and New types of Serbian Tsigai sheep
title_fullStr Genetic differentiation between the Old and New types of Serbian Tsigai sheep
title_full_unstemmed Genetic differentiation between the Old and New types of Serbian Tsigai sheep
title_short Genetic differentiation between the Old and New types of Serbian Tsigai sheep
title_sort genetic differentiation between the old and new types of serbian tsigai sheep
topic Research
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2674905/
https://www.ncbi.nlm.nih.gov/pubmed/18400153
http://dx.doi.org/10.1186/1297-9686-40-3-321
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