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Acta Agronómica

Print version ISSN 0120-2812

Abstract

CALERO QUINTERO, David; DURAN CASTRO, Carlos Vicente  and  URIBE CEBALLOS, José Reinel. Levels and effects of inbreeding on performance traits during tempt and fight from two fighting bull farms in Colombia. Acta Agron. [online]. 2010, vol.59, n.2, pp.218-227. ISSN 0120-2812.

This study was carried out to estimate levels and trends of the inbreeding on behavior variables during the tempt and fight from two fighting farms: Ernesto González Caicedo (EGC) and Guachicono (GUA) with strains Santacoloma, and Parladé respectively, located on Popayán and Bolívar, municipalities of the Cauca Department, Colombia. The pedigrees of 2094 EGC animals born between 1918 and 2007, and 963 GUA animals born between 1928 and 2005 were analyzed. Inbreeding coefficients of the cattle were obtained using PROC INBREED from the software SAS v. 9.1.3. In addition to the breeder’s notes the own variables, dealing and common to the tempt and fight task were studied. The average and standard deviations of the blood relationship during the total and the last time studied for the cattle raising EGC and GUA were 6.6 and 5.8%; and 4.2 and 6%, respectively. Means and standard deviations of inbreeding in EGC and GUA were 4.9±6.6 and 4.2±4.2% for the all animals, 4.5±5.8 and 6.0±3.4% for the last time studied , and 10.6±5.8 and 6.51±3.5% taking in to account only those that were related. The effect of some variables with the inbreeding had positive effects in those responsible for the ‘toreabilidad’ and style, and depressive on the force of the animals. The current inbreeding in these populations is medium; however, mating should be planned for an appropriate handling and to reduce increases in inbreeding.

Keywords : Inbreeding; pedigree; fighting cattle; strains; Santacoloma,; Parlade; Colombia.

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