TY - JOUR
T1 - Épocas de nacimiento basadas en un índice climático para el ajuste de modelos estadísticos para peso vivo de ganado bovino en México
AU - Herrera-Ojeda, Jessica Beatriz
AU - Parra-Bracamonte, Gaspar Manuel
AU - López-Villalobos, Nicolás
AU - Vázquez-Armijo, José Fernando
AU - Orozco-Durán, Karlos Edmundo
AU - Magaña-Monforte, Juan Gabriel
AU - Martínez-González, Juan Carlos
AU - Jahuey-Martínez, Francisco Joel
N1 - Publisher Copyright:
© 2018 INIFAP-CENID Parasitologia Veterinaria. All rights reserved.
PY - 2018/10/1
Y1 - 2018/10/1
N2 - The objective of this study was to compare the effects of a methodology for the climatic season classification that traditionally had been used as birth season (BS) in statistical assessments. This methodology bases in an aridity index (AI) to classify BS using meteorological historic information. Using a 7,460-pedigree animals dataset were fitted two statistical models for birth and weaning weights of Charolais cattle. Genetic models included the fixed effect of contemporary groups (CG= herd, sex, year and BS) and dam age as a covariate (linear and quadratic). Same models compared with a traditional season classification for BS. When variance component and expected progeny differences (EPD) were predicted with their accuracies, models were statistically different accordingly to the likelihood ratio test (P<0.01). An improvement and reduction in CG conformation (25 %) were observed for those models including IA based BS. The main effect in assessed models was the ranking changes in EPD from both traits. This classification method of birth season can improve the model fitting in animal production based in extensive systems.
AB - The objective of this study was to compare the effects of a methodology for the climatic season classification that traditionally had been used as birth season (BS) in statistical assessments. This methodology bases in an aridity index (AI) to classify BS using meteorological historic information. Using a 7,460-pedigree animals dataset were fitted two statistical models for birth and weaning weights of Charolais cattle. Genetic models included the fixed effect of contemporary groups (CG= herd, sex, year and BS) and dam age as a covariate (linear and quadratic). Same models compared with a traditional season classification for BS. When variance component and expected progeny differences (EPD) were predicted with their accuracies, models were statistically different accordingly to the likelihood ratio test (P<0.01). An improvement and reduction in CG conformation (25 %) were observed for those models including IA based BS. The main effect in assessed models was the ranking changes in EPD from both traits. This classification method of birth season can improve the model fitting in animal production based in extensive systems.
KW - Aridity index
KW - Cattle
KW - Charolais
KW - Genetic evaluation
KW - Live weight
UR - http://www.scopus.com/inward/record.url?scp=85054878329&partnerID=8YFLogxK
U2 - 10.22319/rmcp.v9i4.4517
DO - 10.22319/rmcp.v9i4.4517
M3 - Artículo
SN - 2007-1124
VL - 9
SP - 646
EP - 666
JO - Revista Mexicana De Ciencias Pecuarias
JF - Revista Mexicana De Ciencias Pecuarias
IS - 4
ER -