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https://ria.asturias.es/RIA/handle/123456789/674
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| Título: | Genetic relationships and admixture among sheep breeds from Northern Spain assessed using microsatellites |
| Autores: | Álvarez, Isabel
Royo Martín, Luis J.
Fernández, Itziar
Gutiérrez, Juan P.
Gómez, Enrique
Goyache, Félix |
| Palabras Claves: | Admixture
Microsatellite
Migration rate
Population structure
Sheep |
| Fecha Edición: | 2004 |
| Editor: | American Society of Animal Science |
| Cita Bibliográfica: | Álvarez, I.; Royo, L.J.; Fernández, I.; Gutiérrez, J.P.; Gómez, E.; Goyache, F. Genetic relationships and admixture among sheep breeds from Northern Spain assessed using microsatellites. Journal of Animal Science. 2004; 82: 2246-2252. |
| Resumen: | Although many research papers have
studied diversity and differentiation within livestock
species, genetic relationships among neighboring populations
remain poorly understood. Here we apply recent
methodologies to analyze the polymorphism of 14 microsatellites
in 238 unrelated individuals belonging to six
sheep breeds from Northern Spain to ascertain their
historical relationships and the relative genetic contributions
existing between populations. Individual genotypes
were analyzed to assess the existence of an underlying
genetic structure. Long-term and recent migration
rates were estimated to identify patterns of relative
genetic contribution among breeds. The complete data set showed a strong population structure derived from
both different ancestral origins and some geographical
patterns of recent gene flow. Two of the analyzed breeds
(Black-faced Latxa and Churra) had a marked genetic
background, supporting the hypothesis that, regardless
of their phenotypical similarities, they have different
ancestral origins. Some of the more presumably related
breeds had negative long-term admixture coefficients,
showing that they diverged only recently. In addition,
we show how methodologies for estimation of long-term
gene flow and recent patterns of migration are complementary,
providing information about migration rates
on different timescales. |
| URI: | https://ria.asturias.es/RIA/handle/123456789/674 |
| ISSN: | 0021-8812 |
| Aparece en las Colecciones: | Agroalimentación y Ganadería
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