Article (Scientific journals)
Multi-trait analysis of growth traits: Fitting reduced rank models using principal components for simmental beef cattle
REIS MOTA, Rodrigo; Costa, Edson Vinícius; Lopes, Paulo Sávio et al.
2016In Ciencia Rural, 46 (9), p. 1656-1661
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Keywords :
Computational demand; Genetic parameters; Heritability
Abstract :
[en] The aim of this research was to evaluate the dimensional reduction of additive direct genetic covariance matrices in genetic evaluations of growth traits (range 100-730 days) in Simmental cattle using principal components, as well as to estimate (co)variance components and genetic parameters. Principal component analyses were conducted for five different models-one full and four reduced-rank models. Models were compared using Akaike information (AIC) and Bayesian information (BIC) criteria. Variance components and genetic parameters were estimated by restricted maximum likelihood (REML). The AIC and BIC values were similar among models. This indicated that parsimonious models could be used in genetic evaluations in Simmental cattle. The first principal component explained more than 96% of total variance in both models. Heritability estimates were higher for advanced ages and varied from 0.05 (100 days) to 0.30 (730 days). Genetic correlation estimates were similar in both models regardless of magnitude and number of principal components. The first principal component was sufficient to explain almost all genetic variance. Furthermore, genetic parameter similarities and lower computational requirements allowed for parsimonious models in genetic evaluations of growth traits in Simmental cattle. © 2016, Universidade Federal de Santa Maria. All rights reserved.
Disciplines :
Genetics & genetic processes
Agriculture & agronomy
Animal production & animal husbandry
Author, co-author :
REIS MOTA, Rodrigo ;  Université de Liège > Agronomie, Bio-ingénierie et Chimie (AgroBioChem) > Ingénierie des productions animales et nutrition
Costa, Edson Vinícius;  Departamento de Zootecnia, Universidade Federal de Viçosa (UFV), Campus Universitário, Avenida Ph Rolfs, s/n, Viçosa, MG, Brazil
Lopes, Paulo Sávio;  Departamento de Zootecnia, Universidade Federal de Viçosa (UFV), Campus Universitário, Avenida Ph Rolfs, s/n, Viçosa, MG, Brazil
Nascimento, Moyses;  Departamento de Estatística, Universidade Federal de Viçosa (UFV), Viçosa, MG, Brazil
da Silva, Luciano Pinheiro;  Departamento de Zootecnia, Universidade Federal do Ceará (UFC), Fortaleza, CE, Brazil
Silva, Fabyano Fonseca;  Departamento de Zootecnia, Universidade Federal de Viçosa (UFV), Campus Universitário, Avenida Ph Rolfs, s/n, Viçosa, MG, Brazil
Marques, Luiz Fernando Aarão;  Departamento de Zootecnia, Centro de Ciências Agrárias, Universidade Federal do Espírito Santo (UFES), Alegre, ES, Brazil
Language :
English
Title :
Multi-trait analysis of growth traits: Fitting reduced rank models using principal components for simmental beef cattle
Alternative titles :
[en] Portuguese: [Efetividade da redução da dimensão da matriz de covariância do efeito genético direto na avaliação genética do crescimento em bovinos simental]
Publication date :
2016
Journal title :
Ciencia Rural
ISSN :
0103-8478
eISSN :
1678-4596
Publisher :
Universidade Federal de Santa Maria
Volume :
46
Issue :
9
Pages :
1656-1661
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 27 April 2017

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