Genetic parameters and genetic trends for behavior traitsin Mexican bullfighting herds
The aims of this study were to estimate variance components; calculate heritability (h2) and genetic correlations (rg)predict breeding values (VG) and evaluate their trends over time. Behavior information was analyzed for four Mexicanbullfighting ranches: Los Encinos (ENC), Montecristo (MCR), San José (SJO) y Fernando de la Mora (FMO). Theanalyzed information included was horse tienta (TC), foot tienta (TP), horse bullfight (LC) and foot bullfight (LP). Thenumber of observations ranged from 154 to 2,369, the number of animals in the pedigrees varied from 3,246 to8,962. Multivariate analyses were conducted using the MTDFREML software. The estimates of h2 were from mediumto high magnitude, in a range from 0.09±0.05 to 0.47±0.22, and an average of 0.28±0.09. The average of h2 by traitwas 0.33±0.06 for TC and TP, 0.23±0.14 for LC and 0.27±0.12 for LP. All rg were positive and higher than 0.50, withthe exception of TP and LP (0.44±0.38) in FMO, and TC and LP (0.28±0.14) in MCR. The average of the rg withinranches was 0.71±0.14 in MCR, 0.77±0.35 in FMO, 0.78±0.18 in ENC, and 0.85±0.31 in SJO. The trends of the VGwere positive and nonzero (P<0.02), with the exception of LP in FMO (P>0.05). The magnitude of the genetic gainper year, as a percentage of the mean, ranged from 0.19 % in LC of FMO to 1.5 % in TP of ENC. The variability ofVG suggests its use in breeding programs to promote greater genetic progress.
| Main Authors: | , , , , |
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| Format: | Digital revista |
| Language: | spa |
| Published: |
Instituto Nacional de Investigaciones Forestales, Agrícolas y Pecuarias
2015
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| Online Access: | https://cienciaspecuarias.inifap.gob.mx/index.php/Pecuarias/article/view/3970 |
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