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Feed efficiency in Nellore cattle (Bos indicus): impact of molecular breeding value estimation methods in the accuracy of breeding values estimates
Tuesday, August 19, 2014: 11:30 AM
Bayshore Grand Ballroom B-C (The Westin Bayshore)
Jose Bento S Ferraz
,
NAP-GMABT/FZEA/University of Sao Paulo, Pirassununga, Brazil
Miguel H A Santana
,
NAP-GMABT/FZEA/University of Sao Paulo, Pirassununga, Brazil
Gerson A. Oliveira Jr.
,
NAP-GMABT/FZEA/University of Sao Paulo, Pirassununga, Brazil
Fernanda M Rezende
,
Federal University of Uberlandia, Patos de Minas, Brazil
Heidge Fukumasu
,
NAP-GMABT/FZEA/University of Sao Paulo, Pirassununga, Brazil
Pâmela A Alexandre
,
NAP-GMABT/FZEA/University of Sao Paulo, Pirassununga, Brazil
Aline S.M. Cesar
,
LZT/ESALQ/University of Sao Paulo, Piracicaba, Brazil
Minos E. Carvalho
,
NAP-GMABT/FZEA/University of Sao Paulo, Pirassununga, Brazil
Luiz L. Coutinho
,
Universidade de São Paulo/Esalq, Piracicaba, Brazil
Joanir P Eler
,
NAP-GMABT/FZEA/University of Sao Paulo, Pirassununga, Brazil
Elisangela C Mattos
,
NAP-GMABT/FZEA/University of Sao Paulo, Pirassununga, Brazil
Fernando Baldi
,
Universidade Estadual Paulista “Júlio de Mesquita Filho”- UNESP, Faculdade de Ciências Agrárias e Veterinárias, Jaboticabal, Brazil
Dorian J. Garrick
,
Iowa State University, Ames, IA
Abstract Text:
Data from individually controlled feed consumption of 640 Nellore young bulls (DMI), average daily gain (ADG), feed conversion rate (FCR), residual feed intake (RFI) and residual intake and body weight gain (RIG), genotyped in Illumina Bovine SNP50 v2 DNA Analysis BeadChip were used. After quality control, 28,231 DNA markers were considered informative and were submitted to six approaches for estimation of molecular breeding values: Bayes A, Bayes B, Bayes C, Bayes Cπ, GBLUP and Single Step. Accuracies of genome-assisted expected progeny differences were compared with accuracies estimated from single traits REML BLUP analyses and the increment is reported in this paper. Very intense impacts of using molecular information were observed in genotyped animals, and their sires and dams, with genotyped young bulls estimates reaching accuracies as high as the ones of bulls with 45 or more progeny.
Keywords: Bos indicus, beef cattle, feed efficiency, genome assisted EBV
