The genetic and genomic effects of Nellore lineages on feed efficiency, intake and performance

Autor(es):Mostrar menos -

de Almeida Santana, Miguel Henrique ^[1] ; Gebim Polizel, Guilherme Henrique ^[1] ; Grigoletto, Lais ^[2] ; Fernandes, Aricia Christofaro ^[1] ; Bonin, Marina de Nadai ^[3] ; Gomes, Rodrigo da Costa ^[4] ; Carvalho, Minos Esperandio ^[2] ; da Luz e Silva, Saulo ^[1] ; Leme, Paulo Roberto ^[1] ; Rossi Junior, Paulo ^[5] ; Sterman Ferraz, Jose Bento ^[2]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Fac Zootecnia & Engn Alimentos, Dept Anim Sci, Av Duque de Caxias Norte 225, BR-13635900 Pirassununga, SP - Brazil

^[2] Univ Sao Paulo, Fac Zootecnia & Engn Alimentos, Dept Vet Med, Av Duque de Caxias Norte 225, BR-13635900 Pirassununga, SP - Brazil

^[3] Univ Fed Mato Grosso do Sul, Dept Anim Sci, Fac Med Vet & Zootecnia, Av Costa E Silva S-N, BR-79070900 Campo Grande, MS - Brazil

^[4] EMBRAPA, CNPGC, Empresa Brasileira Pesquisa Agr, BR 262 Km 4, BR-79002970 Campo Grande, MS - Brazil

^[5] Univ Fed Parana UFPR, Dept Anim Sci, Rua Funcionarios 1550, BR-80035050 Curitiba, Parana - Brazil

• Tipo de documento: Artigo Científico
• Fonte: LIVESTOCK SCIENCE; v. 228, p. 104-108, OCT 2019.
• Citações Web of Science: 0

Resumo

The capacity of beef cattle to transform feed into meat is fundamental to this production system, but it has not been accounted for in the genetic selection of Nellore animals, a main tropical breed. The objective of the present study was to verify differences in the genetic effects between Nellore lineages, allied to the inclusion of genomic data in these estimates. Phenotypic data of 2058 Nellore cattle were used for the following traits: average daily gain (ADG), dry matter intake (DMI), feed conversion ratio (FCR) and residual feed intake (RFI). The pedigree contained 9,079 animals, of which 2226 were genotyped. Eleven main founders were selected of the Nellore breed (Founder), as well as 19 new founders (Breeder), with cattle that are highly representative animals of this breed. The genetic and genomic effects of each founder and its accuracy were estimated by the average information restricted maximum likelihood method using the program BLUPF90. There was genetic variability in Nellore lineages in terms of performance, feed intake and efficiency, and the accuracy of these estimates increased with the inclusion of genomics. Thus, it is possible to choose progenitors of the best lineages, with better genetic potential and good accuracy, to improve these traits in beef production. (AU)

• Processo FAPESP: 13/20571-2 - Genômica funcional da ingestão e eficiência alimentar de bovinos da raça Nelore
• Beneficiário: Miguel Henrique de Almeida Santana
• Linha de fomento: Bolsas no Brasil - Pós-Doutorado
• Processo FAPESP: 13/26902-0 - Uso da variância genética em modelos mecanicistas dinâmicos de crescimento para predizer o desempenho e a composição da carcaça de bovinos confinados.
• Beneficiário: Mateus Castelani Freua
• Linha de fomento: Bolsas no Brasil - Mestrado
• Processo FAPESP: 14/07566-2 - Genômica aplicada à produção de ruminantes
• Beneficiário: José Bento Sterman Ferraz
• Linha de fomento: Auxílio à Pesquisa - Temático
• Processo FAPESP: 12/02039-9 - Estudo genômico da ingestão e eficiência alimentar em bovinos da raça Nelore
• Beneficiário: José Bento Sterman Ferraz
• Linha de fomento: Auxílio à Pesquisa - Regular