Estimación de polimorfismos del gen de leptina bovino en poblaciones de las razas criollas Hartón del Valle, Blanco Orejinegro (BON) y en la raza Brahman

María T Guerra; Esperanza Trujillo Bravo; Mario Fernando Cerón Muñoz

doi:10.17533/udea.rccp.324015

Autores/as

María T Guerra
Esperanza Trujillo Bravo
Mario Fernando Cerón Muñoz

DOI:

https://doi.org/10.17533/udea.rccp.324015

Palabras clave:

microsatelite, gen obeso, ST, WD

Resumen

En investigaciones recientes se han identificado algunas regiones entre y adyacentes al gen de leptina, asociadas con diferentes niveles de grasa de la carne en canal, y cuyas frecuencias varían grandemente de una raza a otra, y de una población a otra. En este trabajo, fueron determinados los polimorfismos para la región 5 UTR? (región que no traduce) y región flanqueante al extremo 3? del gen leptina, utilizando dos microsatélites ST y WD (G18586 y U50365). Fueron evaluados 261 animales de las razas Hartón del Valle (100), Brahman (121) y BON (40). Se encontraron 7 alelos diferentes para el marcador ST y 15 para WD, considerando la población total analizada. Las poblaciones de las razas criollas evaluadas para los marcadores ST y WD, no se encuentran en equilibrio de Hardy-Weinberg. El mayor polimorfismo para el microsatélites ST se encontró en la raza Brahman, que presentó 6 alelos. Para WD fue más polimorfica Hartón del Valle con 15 alelos diferentes. La menos polimórfica fue la raza BON, con 4 alelos para ST y 6 para WD.

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