Variación genética en dos genes candidatos contra parásitos gastrointestinales en Ovinos de Pelo Colombiano

Genetic variation in two candidate genes against gastrointestinal parasites in Colombian Hair Sheep

Objetivo. Caracterizar dos polimorfismos genéticos tipo SNP en los genes GLI1 (rs411868094) y IL20RA (rs419463995) candidatos a la resistencia contra parásitos gastrointestinales en dos biotipos de ovinos de pelo colombiano. Materiales y métodos. Del banco de ADN del laboratorio de Genética Animal de la Universidad de Sucre, se analizaron 167 muestras de ovino de pelo colombiano (OPC), pertenecientes a los biotipos Etíope (n=94) y Sudán (n=73), mediante PCR y secuenciamiento bidireccional dos SNPs en los genes GLI1 (T>G) y IL20RA (G>A). Se calcularon las frecuencias alélicas y genotípicas, la heterocigocidad observada (Ho) y esperada (He), el índice F y las desviaciones del equilibrio de Hardy-Weinberg (EHW) con el programa GENALEX versión 6.5. Resultados. Para el gen GLI1 para todo el OPC las frecuencias genotípicas promedio fueron 0.155±0.07, 0.370±0.07 y 0.475±0.07 para GG, GT y TT, respectivamente. En el biotipo Etíope, se encontraron las frecuencias más altas del genotipo GG. Para el gen IL20RA en todo el OPC, los genotipos AA y AG tuvieron similar frecuencia (0.465±0.03) y el genotipo GG mostró la frecuencia más baja (0.110±0.01). Conclusiones. Las variantes genéticas analizadas fueron polimórficas. Según los reportes de literatura, los alelos de interés por su mejor desempeño contra los parásitos gastrointestinales, tuvieron baja frecuencia en el gen GLI1, pero alta frecuencia en el IL20RA.

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