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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...
Autores principales: | , , , , , , , , |
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Formato: | Texto |
Lenguaje: | English |
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BioMed Central
2008
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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. |
format | Text |
id | pubmed-2674905 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2008 |
publisher | BioMed Central |
record_format | MEDLINE/PubMed |
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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