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da Silveira DD, Pereira RJ, Roso VM, de Souza FRP, Boligon AA. Genetic parameters, genetic trends and correlated responses of growth traits considering maternal ability in Nelore cattle. Trop Anim Health Prod 2024; 56:143. [PMID: 38664282 DOI: 10.1007/s11250-024-03977-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2023] [Accepted: 04/05/2024] [Indexed: 06/12/2024]
Abstract
The growth of Nelore cattle was analysed considering the following performance parameters; the effect of the calving order of cows on the phenotypic expression of birth weight (BW), average daily gain from birth to weaning (BWG), and weaning weight (WW), the estimated genetic parameters for the traits, including the covariance components between direct and maternal genetic effects. Genetic trends and correlated responses were also obtained for the studied traits. The calving order of cows, as well as other fixed effects used to obtain the adjusted phenotypic means, were statistically significant (p < 0.001) for studied traits. Direct heritability was estimated at 0.24 ± 0.01 (BW), 0.15 ± 0.01 (BWG), and 0.18 ± 0.01 (WW), while maternal heritability was 0.06 ± 0.01 (BW), 0.12 ± 0.01 (BWG), and 0.11 ± 0.01 (WW). The correlations between direct and maternal effects within the same trait were negligible. Moderate to higher direct genetic correlations (ranging from 0.54 ± 0.04 to 0.98 ± 0.01) and maternal genetic correlations (ranging from 0.34 ± 0.09 to 0.99 ± 0.002) were estimated between the studied traits. Unlike direct genetic effects, there was no significant change in maternal genetic effects over time (p > 0.05). These results indicated the need for revising selection indexes for enhancing maternal ability. Correlated responses were generally lower compared to direct responses, except for BWG. The selection for BWG, considering the maternal genetic effect, would be more efficient to improve maternal ability of the cows for pre-weaning growth in relation to selection for WW. Our results found that direct genetic merit improves pre-weaning weight and this trait can be incorporated into the breeding goal as reflected in the WW.
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Affiliation(s)
| | - Rodrigo Junqueira Pereira
- Animal Improvement Group of Mato Grosso (GMAT), Federal University of Rondonópolis, Avenida Dos Estudantes, 5055, Cidade Universitária, Rondonópolis, MT, CEP 78736-900, Brazil
| | | | | | - Arione Augusti Boligon
- Department of Animal Science, Federal University of Pelotas, Pelotas, RS, 96160-000, Brazil
- National Council for Scientific and Technological Development - CNPq, Brasília, DF, 71605-001, Brazil
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Soares BB, Brunes LC, Baldi FS, Carmo ASDO, Pereira LS, Carvalho RA, Narciso MG, Amorim ST, Sainz RD, Magnabosco CU. Genetic parameters for visual scores, growth and carcass traits in Nellore Cattle. AN ACAD BRAS CIENC 2024; 96:e20230010. [PMID: 38451594 DOI: 10.1590/0001-3765202420230010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2023] [Accepted: 12/02/2023] [Indexed: 03/08/2024] Open
Abstract
Growth and carcass traits are essential selection criteria for beef cattle breeding programs. However, it is necessary to combine these measurements with body composition traits to meet the demand of the consumer market. This study aimed to estimate the genetic parameters for visual scores, growth (pre and post-weaning weights), and carcass (rib eye area (REA), back and rump fat thickness) traits in Nellore cattle using Bayesian inference. Data from 12,060 animals belonging to the HoRa Hofig Ramos herd were used. Morphological traits were evaluated by the MERCOS methodology. The heritability estimates obtained ranged from low to high magnitude, from 0.15 to 0.28 for visual scores, 0.13 to 0.44 for growth, and from 0.42 to 0.46 for carcass traits. Genetic correlations between visual scores and growth traits were generally of moderate to high magnitudes, however, visual scores showed low correlations with carcass traits, except between sacral bone and structure and REA. Selection for visual score traits can lead to favorable responses in body weight and vice versa, but the same is not true for carcass traits. Morphological categorical traits can be used as complementary tools that add value to selection.
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Affiliation(s)
- Byanka B Soares
- Universidade Federal de Goiás, Departamento de Produção Animal, Campus Samambaia, Rodovia Goiânia - Nova Veneza, Km 8, 74690-900 Goiânia, GO, Brazil
| | - Ludmilla C Brunes
- Embrapa Cerrados, Rodovia BR-020, Km 18, 73310-970 Planaltina, DF, Brazil
| | - Fernando Sebastian Baldi
- Universidade Estadual Paulista, Campus Jaboticabal, Via de Acesso Prof. Paulo Donato Castellane, s/n, 14884-900 Jaboticabal, SP, Brazil
| | - Adriana S DO Carmo
- Universidade Federal de Goiás, Escola de Veterinária e Zootecnia, Campus Samambaia, Rodovia Goiânia - Nova Veneza, Km 8, 74690-900 Goiânia, GO, Brazil
| | - Letícia S Pereira
- Universidade Federal de Goiás, Departamento de Produção Animal, Campus Samambaia, Rodovia Goiânia - Nova Veneza, Km 8, 74690-900 Goiânia, GO, Brazil
| | - Rafael A Carvalho
- Universidade Federal de Goiás, Centro de Parasitologia Veterinária, Avenida Esperança, s/n, Campus Samambaia, 74045-155 Goiânia, GO, Brazil
| | - Marcelo G Narciso
- Embrapa Arroz e Feijão, Rodovia GO-462, Km 12, Fazenda Capivara, Zona Rural, 75375-000 Santo Antônio de Goiás, GO, Brazil
| | - Sabrina T Amorim
- Virginia Polytechnic Institute and State University, School of Animal Sciences, Department of Animal and Poultry Sciences, West Campus Dr. Blacksburg, VA, 24060, USA
| | - Roberto Daniel Sainz
- Universidade Federal de Goiás, Departamento de Produção Animal, Campus Samambaia, Rodovia Goiânia - Nova Veneza, Km 8, 74690-900 Goiânia, GO, Brazil
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Larios-Sarabia N, Domínguez-Viveros J, Hidalgo J, Ramírez-Valverde R, Núñez-Domínguez R, Martínez-Rocha RE, Rodríguez-Almeida FA, Villegas-Gutiérrez C, Saiz-Pineda F. Genetic trends of Mexican zebu cattle populations. ITALIAN JOURNAL OF ANIMAL SCIENCE 2022. [DOI: 10.1080/1828051x.2022.2104662] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
Affiliation(s)
- Neon Larios-Sarabia
- Posgrado en Producción Animal, Universidad Autónoma Chapingo, Chapingo, México
| | | | - Jorge Hidalgo
- Department of Animal and Dairy Science, University of Georgia, Athens, GA, USA
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