Article (Scientific journals)
Genetic evaluation using multi-trait and random regression models in Simmental beef cattle
REIS MOTA, Rodrigo; Marques, L. F. A.; Lopes, P. S. et al.
2013In Genetics and Molecular Research, 12 (3), p. 2465-2480
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Keywords :
Body weight; Growth trajectory; Heritability
Abstract :
[en] The Brazilian Association of Simmental and Simbrasil Cattle Farmers provided 29,510 records from 10,659 Simmental beef cattle; these were used to estimate (co)variance components and genetic parameters for weights in the growth trajectory, based on multi-trait (MTM) and random regression models (RRM). The (co)variance components and genetic parameters were estimated by restricted maximum likelihood. In the MTM analysis, the likelihood ratio test was used to determine the significance of random effects included in the model and to define the most appropriate model. All random effects were significant and included in the final model. In the RRM analysis, different adjustments of polynomial orders were compared for 5 different criteria to choose the best fit model. An RRM of third order for the direct additive genetic, direct permanent environmental, maternal additive genetic, and maternal permanent environment effects was sufficient to model variance structures in the growth trajectory of the animals. The (co)variance components were generally similar in MTM and RRM. Direct heritabilities of MTM were slightly lower than RRM and varied from 0.04 to 0.42 and 0.16 to 0.45, respectively. Additive direct correlations were mostly positive and of high magnitude, being highest at closest ages. Considering the results and that pre-adjustment of the weights to standard ages is not required, RRM is recommended for genetic evaluation of Simmental beef cattle in Brazil. ©FUNPEC-RP.
Disciplines :
Animal production & animal husbandry
Agriculture & agronomy
Genetics & genetic processes
Author, co-author :
REIS MOTA, Rodrigo ;  Université de Liège > Agronomie, Bio-ingénierie et Chimie (AgroBioChem) > Ingénierie des productions animales et nutrition
Marques, L. F. A.;  Departamento de Zootecnia, Centro de Ciências Agrárias, Universidade Federal do Espírito Santo, Alegre, ES, Brazil
Lopes, P. S.;  Departamento de Zootecnia, Universidade Federal de Viçosa, Viçosa, MG, Brazil
da Silva, L. P.;  Departamento de Zootecnia, Universidade Federal de Viçosa, Viçosa, MG, Brazil
Neto, F. R. A.;  Departamento de Zootecnia, Universidade Estadual Paulista 'Júlio de Mesquita Filho', Jaboticabal, SP, Brazil
de Resende, M. D. V.;  Embrapa Florestas, Colombo, PR, Brazil, Departamento de Engenharia Florestal, Universidade Federal de Viçosa, Viçosa, MG, Brazil
Torres, R. A.;  Departamento de Zootecnia, Universidade Federal de Viçosa, Viçosa, MG, Brazil
Language :
English
Title :
Genetic evaluation using multi-trait and random regression models in Simmental beef cattle
Publication date :
2013
Journal title :
Genetics and Molecular Research
ISSN :
1676-5680
Publisher :
Fundacao de Pesquisas Cientificas de Ribeirao Preto (FUNPEC-RP)
Volume :
12
Issue :
3
Pages :
2465-2480
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 27 April 2017

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