Reference : Contemporary groups in the genetic evaluation of Nellore cattle using Bayesian inference
Scientific journals : Article
Life sciences : Animal production & animal husbandry
http://hdl.handle.net/2268/216300
Contemporary groups in the genetic evaluation of Nellore cattle using Bayesian inference
English
[en] Portuguese: Grupos de contemporâneos na avaliação genética de gado Nelore por inferência bayesiana
Alves da Silva, Delvan [> >]
Fonseca e Silva, Fabyano [> >]
Torres Ventura, Henrique [> >]
Silva Junqueira, Vinícius [> >]
Alves da Silva, Alessandra [> >]
REIS MOTA, Rodrigo mailto [Université de Liège - ULiège > Agronomie, Bio-ingénierie et Chimie (AgroBioChem) > Ingénierie des productions animales et nutrition >]
Sávio Lopes, Paulo [> >]
Aug-2017
Pesquisa Agropecuaria Brasileira
52
8
643-651
Yes (verified by ORBi)
International
0100-204X
Brasilia
Brazil
[en] heritability ; outliers ; zebu
[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.
Researchers ; Professionals ; Students
http://hdl.handle.net/2268/216300
10.1590/s0100-204x2017000800010

File(s) associated to this reference

Fulltext file(s):

FileCommentaryVersionSizeAccess
Restricted access
Contemporary groups in the genetic evaluation of Nellore cattle using Bayesian inference.pdfPublisher postprint403.63 kBRequest copy

Bookmark and Share SFX Query

All documents in ORBi are protected by a user license.