Resumen de Introgresion de genes de cebú del Sahel en las poblaciones bovinas tripano tolerantes de Burkina Faso
I. Álvarez, A. Traoré, Iván Fernández, M. Cuervo, Thomas Lecomte, H.H. Tamboura, Félix Goyache Goñi
Due to progressive desertification, introgression of Sahelian zebu cattle genes into native Bos taurus populations of West Africa jeopardise a major inheritable trait: trypanotolerance. The aim of this note is to asses the usefulness of a set of microsatellites to estimate admixture coefficients in two cattle populations of Burkina Faso: Lobi (32 samples) and N’Dama (23). Samples of African zebu (32) and N’Dama from Congo (42) were used as parental populations. The higher differentiation (Reynolds’ distance) found was between the African zebu and the N’Dama from Congo (DR = 0.123) while the two N’Dama populations and the pair Burkinabé N’Dama and African zebu were poorly differentiated (0.064 and 0.054, respectively). The zebu admixture coefficients estimated for the Lobi breed were low or nill when the other parental population was the Burkinabé N’Dama. However, they become non negligible when the N’Dama from Congo was used (from 25.6% to 39,1%). The admixture coefficients estimated for the Burkinabé N’Dama population were higher that those estimated for the Lobi breed (roughly 47%).
