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La historia genómica y la expansión global de los burros domésticos
Evelyn T Todd1, Laure Tonasso-Calvière1, Loreleï Chauvey1
1Centre d'Anthropobiologie et de Génomique de Toulouse (CAGT), CNRS UMR 5288, Université Paul Sabatier, Toulouse 31000, France.
Resumen
El burro
Área de la Ciencia:
- Genómica de los animales
- Arqueología
- La historia antigua
Sus antecedentes:
- Los burros han sido vitales para la historia humana, especialmente en las regiones áridas y montañosas.
- A pesar de su importancia, los burros siguen siendo poco estudiados, especialmente su domesticación y diversidad genética.
- Sigue siendo crucial para las comunidades de los países de ingresos bajos a medios.
Objetivo del estudio:
- Para investigar la historia de la domesticación y la estructura de la población de burros.
- Identificar linajes genéticos clave y patrones de migración a lo largo de la historia.
- Comprender las antiguas prácticas de manejo de burros y su impacto.
Principales métodos:
- Análisis de todo el genoma de 207 burros modernos, 31 burros antiguos y 15 équidos salvajes.
- Análisis filogeográfico para reconstruir la historia y las relaciones de la población.
- Investigación de marcadores genéticos asociados con las prácticas de cría antiguas.
Principales resultados:
- Se identificó un solo evento de domesticación de burros en África alrededor del año 5000 aC.
- Se encontraron pruebas de múltiples eventos de dispersión en África y Eurasia.
- Se descubrió un linaje genético previamente no reconocido del Levante alrededor del año 200 aC, que influyó en la ascendencia asiática.
- El manejo antiguo del burro incluía la endogamia y la cría selectiva para tamaños más grandes, coincidiendo con la era romana.
Conclusiones:
- El estudio aclara el origen africano y la posterior propagación mundial de los burros.
- Un nuevo linaje levantino tuvo un impacto significativo en la ascendencia del burro en Asia.
- Las antiguas prácticas de cría revelan estrategias de manejo sofisticadas vinculadas a necesidades económicas y militares históricas.
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