Population structure of five native sheep breeds of Sweden estimated with high density SNP genotypes
Abstract Background Native Swedish sheep breeds are part of the North European short-tailed sheep group; characterized in part by their genetic uniqueness. Our objective was to study the population structure of native Swedish sheep. Five breeds were genotyped using the 600 K SNP array. Dalapäls and...
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| Format: | Article |
| Language: | English |
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BMC
2020-03-01
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| Series: | BMC Genetics |
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| Online Access: | http://link.springer.com/article/10.1186/s12863-020-0827-8 |
| _version_ | 1818149728061227008 |
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| author | Christina Marie Rochus Elisabeth Jonas Anna M. Johansson |
| author_facet | Christina Marie Rochus Elisabeth Jonas Anna M. Johansson |
| author_sort | Christina Marie Rochus |
| collection | DOAJ |
| description | Abstract Background Native Swedish sheep breeds are part of the North European short-tailed sheep group; characterized in part by their genetic uniqueness. Our objective was to study the population structure of native Swedish sheep. Five breeds were genotyped using the 600 K SNP array. Dalapäls and Klövsjö sheep are from the middle of Sweden; Gotland and Gute sheep from Gotland, an island in the Baltic Sea; and Fjällnäs sheep from northern Sweden. We studied population structure by: principal component analysis (PCA), cluster-based analysis of admixture, and an estimated population tree. Results The analyses of the five Swedish breeds revealed that these breeds are five distinct breeds, while Gute and Gotland are more closely related to each other as seen in all analyses. All breeds had long branch lengths in the population tree indicating they’ve been subjected to drift. We repeated our analyses using 39 K SNP and including 50 K SNP genotypes from other European and southwestern Asian breeds from the Sheep HapMap project and 600 K SNP genotypes from a dataset of French sheep. Results arranged breeds into five groups: south-west Asia, south-west Europe, central Europe, north Europe and north European short-tailed sheep. Within this last group, Norwegian and Icelandic breeds, Finn and Romanov sheep, Scottish breeds, and Gute and Gotland sheep were more closely related while the remaining Swedish breeds and Ouessant sheep were distinct from all breeds and had longer branches in the population tree. Conclusions We showed population structure of five Swedish breeds and their structure within European and southwestern Asian breeds. Swedish breeds are unique, distinct breeds that have been subjected to drift but group with other north European short-tailed sheep. |
| first_indexed | 2024-12-11T13:11:39Z |
| format | Article |
| id | doaj.art-3b1549f2b7c947b4a18061b38730d194 |
| institution | Directory Open Access Journal |
| issn | 1471-2156 |
| language | English |
| last_indexed | 2024-12-11T13:11:39Z |
| publishDate | 2020-03-01 |
| publisher | BMC |
| record_format | Article |
| series | BMC Genetics |
| spelling | doaj.art-3b1549f2b7c947b4a18061b38730d1942022-12-22T01:06:10ZengBMCBMC Genetics1471-21562020-03-012111910.1186/s12863-020-0827-8Population structure of five native sheep breeds of Sweden estimated with high density SNP genotypesChristina Marie Rochus0Elisabeth Jonas1Anna M. Johansson2Department of Animal Breeding and Genetics; Faculty of Veterinary Medicine and Animal Science, Swedish University of Agricultural SciencesDepartment of Animal Breeding and Genetics; Faculty of Veterinary Medicine and Animal Science, Swedish University of Agricultural SciencesDepartment of Animal Breeding and Genetics; Faculty of Veterinary Medicine and Animal Science, Swedish University of Agricultural SciencesAbstract Background Native Swedish sheep breeds are part of the North European short-tailed sheep group; characterized in part by their genetic uniqueness. Our objective was to study the population structure of native Swedish sheep. Five breeds were genotyped using the 600 K SNP array. Dalapäls and Klövsjö sheep are from the middle of Sweden; Gotland and Gute sheep from Gotland, an island in the Baltic Sea; and Fjällnäs sheep from northern Sweden. We studied population structure by: principal component analysis (PCA), cluster-based analysis of admixture, and an estimated population tree. Results The analyses of the five Swedish breeds revealed that these breeds are five distinct breeds, while Gute and Gotland are more closely related to each other as seen in all analyses. All breeds had long branch lengths in the population tree indicating they’ve been subjected to drift. We repeated our analyses using 39 K SNP and including 50 K SNP genotypes from other European and southwestern Asian breeds from the Sheep HapMap project and 600 K SNP genotypes from a dataset of French sheep. Results arranged breeds into five groups: south-west Asia, south-west Europe, central Europe, north Europe and north European short-tailed sheep. Within this last group, Norwegian and Icelandic breeds, Finn and Romanov sheep, Scottish breeds, and Gute and Gotland sheep were more closely related while the remaining Swedish breeds and Ouessant sheep were distinct from all breeds and had longer branches in the population tree. Conclusions We showed population structure of five Swedish breeds and their structure within European and southwestern Asian breeds. Swedish breeds are unique, distinct breeds that have been subjected to drift but group with other north European short-tailed sheep.http://link.springer.com/article/10.1186/s12863-020-0827-8SheepPopulation structureNorth European short-tailed sheepSNP |
| spellingShingle | Christina Marie Rochus Elisabeth Jonas Anna M. Johansson Population structure of five native sheep breeds of Sweden estimated with high density SNP genotypes BMC Genetics Sheep Population structure North European short-tailed sheep SNP |
| title | Population structure of five native sheep breeds of Sweden estimated with high density SNP genotypes |
| title_full | Population structure of five native sheep breeds of Sweden estimated with high density SNP genotypes |
| title_fullStr | Population structure of five native sheep breeds of Sweden estimated with high density SNP genotypes |
| title_full_unstemmed | Population structure of five native sheep breeds of Sweden estimated with high density SNP genotypes |
| title_short | Population structure of five native sheep breeds of Sweden estimated with high density SNP genotypes |
| title_sort | population structure of five native sheep breeds of sweden estimated with high density snp genotypes |
| topic | Sheep Population structure North European short-tailed sheep SNP |
| url | http://link.springer.com/article/10.1186/s12863-020-0827-8 |
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