TY - JOUR
T1 - Información climática asociada a estaciones productivas para el ajuste de modelos estadísticos de sistemas bovinos bajo condiciones extensivas
AU - Herrera-Ojeda, J. B.
AU - Parra-Bracamonte, G. M.
AU - Herrera-Camacho, J.
AU - López-Villalobos, N.
AU - Magaña-Monforte, J. G.
AU - Martínez-González, J. C.
AU - Lobit, P.
AU - Vázquez-Armijo, J. F.
N1 - Publisher Copyright:
© 2018, UCOPress. Cordoba University Press (UCOPress Editorial Universidad de Córdoba). All rights reserved.
PY - 2018
Y1 - 2018
N2 - A study was designed to develop a birth season (BS) classification methodology and assess its impact on live weight traits when compared to a traditional BS classification method. Using meteorological information, and aridity index was computed. The proposed and traditional BS were compared by including them into contemporary groups (CG= herd, sex, year and BS) to adjust genetic evaluation models of studied traits. The variance components and breeding values with accuracies were estimated and compared. The proposed BS explained more phenotypic variation than traditional (≥9.8%). Genetic parameters showed important changes, more evident for weaning weight. According to the likelihood ratio test the compared models were statistically different (P<0.01). An improvement in CG structure was observed. Genetic correlations of breeding values showed important differences suggesting hierarchy changes. This method of BS classification might improve the statistical model fitting when meteorological information could be available.
AB - A study was designed to develop a birth season (BS) classification methodology and assess its impact on live weight traits when compared to a traditional BS classification method. Using meteorological information, and aridity index was computed. The proposed and traditional BS were compared by including them into contemporary groups (CG= herd, sex, year and BS) to adjust genetic evaluation models of studied traits. The variance components and breeding values with accuracies were estimated and compared. The proposed BS explained more phenotypic variation than traditional (≥9.8%). Genetic parameters showed important changes, more evident for weaning weight. According to the likelihood ratio test the compared models were statistically different (P<0.01). An improvement in CG structure was observed. Genetic correlations of breeding values showed important differences suggesting hierarchy changes. This method of BS classification might improve the statistical model fitting when meteorological information could be available.
KW - Aridity index
KW - Bovines
KW - Charolais
KW - Genetic evaluation
KW - Live weight
KW - Statistical model
UR - http://www.scopus.com/inward/record.url?scp=85043759918&partnerID=8YFLogxK
U2 - 10.21071/az.v67i257.3383
DO - 10.21071/az.v67i257.3383
M3 - Artículo
SN - 0004-0592
VL - 67
SP - 21
EP - 28
JO - Archivos de Zootecnia
JF - Archivos de Zootecnia
IS - 257
ER -