Article (Scientific journals)
Contemporary groups in the genetic evaluation of Nellore cattle using Bayesian inference
Alves da Silva, Delvan; Fonseca e Silva, Fabyano; Torres Ventura, Henrique et al.
2017In Pesquisa Agropecuaria Brasileira, 52 (8), p. 643-651
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Keywords :
heritability; outliers; zebu
Abstract :
[en] The objective of this work was to evaluate the criteria for the formation of contemporary groups (CGs) in the genetic evaluation of body weight at weaning in Nellore cattle. A total of 713,474 records from 3,066 herds located in Midwestern and Northern Brazil were used. Data were obtained from the genealogical registry of zebu breeds of the Brazilian association of zebu breeders. Data structures were defined based on the number of standard deviations (SDs) for outlier removal (±2.0, ±2.5, ±3.0, and ±3.5) and on the minimal number of animals per CG (3, 7, and 15). Genetic evaluation was performed with an animal model using Bayesian inference. Data structures with ±3.5 SDs and CG with at least 15 animals presented the highest additive genetic variance (82.65±2.93), and those with ±2.0 SDs and CG with at least 3 animals showed the lowest one (60.23±1.96). The proper formation of CGs results in better-quality data archives, allowing to obtain more trustable estimates for the genetic parameters. Better selection responses are obtained when the following criteria are adopted for the removal of outliers: 2.5, 3.0, and 3.5 standard deviations and a minimum of 15 animals per contemporary group.
Disciplines :
Animal production & animal husbandry
Author, co-author :
Alves da Silva, Delvan
Fonseca e Silva, Fabyano
Torres Ventura, Henrique
Silva Junqueira, Vinícius
Alves da Silva, Alessandra
REIS MOTA, Rodrigo ;  Université de Liège - ULiège > Agronomie, Bio-ingénierie et Chimie (AgroBioChem) > Ingénierie des productions animales et nutrition
Sávio Lopes, Paulo
Language :
English
Title :
Contemporary groups in the genetic evaluation of Nellore cattle using Bayesian inference
Alternative titles :
[en] Portuguese: Grupos de contemporâneos na avaliação genética de gado Nelore por inferência bayesiana
Publication date :
August 2017
Journal title :
Pesquisa Agropecuaria Brasileira
ISSN :
0100-204X
eISSN :
1678-3921
Publisher :
Embrapa Informação Tecnológica, Rio De Janeiro, Brazil
Volume :
52
Issue :
8
Pages :
643-651
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 22 November 2017

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