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Portes JV, Rodrigues GRD, de Vasconcellos Silva JAI, de Paula Freitas A, Mercadante MEZ, Bonilha SFM, Canesin RC, Valente JDPS, Cyrillo JNDSG. Effects of inbreeding on production traits and genetic evaluations in Guzerá beef cattle raised under tropical conditions. Trop Anim Health Prod 2024; 56:132. [PMID: 38642253 DOI: 10.1007/s11250-024-03987-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2023] [Accepted: 04/15/2024] [Indexed: 04/22/2024]
Abstract
The objectives of this study were to evaluate the influence of inbreeding on growth traits and body measurements, as well as on the estimation of genetic parameters and genetic trends in Guzerá cattle. Phenotypic records of 4,212 animals selected for postweaning weight from Guzerá Breeding Program of Advanced Beef Cattle Research Center were utilized. The pedigree file contained records from 7,213 animals born from 1928 to 2019. The traits analyzed were: birth weight (BW), weights adjusted to 210, 378 and 550 days of age (W210, W378 and W550, respectively), chest girth at 378 and 550 days of age (CG378 and CG550), scrotal circumference (SC), and hip height at 378 and 550 days of age (HH378 and H550). Linear regression was used to evaluate the effects of inbreeding on traits. Genetic parameters were obtained using models including or not the effect of inbreeding as a covariate. Inbreeding had negative effects (P ≤ 0.01) on BW (-0.09 kg), W378 (-2.86 kg), W550 (-2.95 kg), HH378 (-0.10 cm), and H550 (-0.29 cm). The lowest and highest heritability estimates were obtained for W210 (0.21 ± 0.07) and HH550 (0.57 ± 0.06), respectively. The genetic correlations were strong and positive between all traits, ranging from 0.44 ± 0.08 (SC x HH) to 0.99 ± 0.01 (W378 x W550). Spearman correlations between EBVs obtained with or without inbreeding effect ranged from 0.968 to 0.995 (P < 0.01). The results indicate loss of productive performance in inbred animals. However, the inclusion of inbreeding coefficient in genetic evaluation models did not alter the magnitude of genetic parameters or genetic trends for the traits studied.
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Affiliation(s)
- Juliana Varchaki Portes
- Department of Animal Science, Federal University of Rio Grande do Sul (UFRGS), Avenue Bento Gonçalves 7712, Porto Alegre, 91540-000, RS, Brazil
| | - Gustavo Roberto Dias Rodrigues
- School of Agricultural and Veterinarian Sciences (FCAV), São Paulo State University (UNESP), Via de Acesso Prof. Paulo Donato Castelane, Jaboticabal, 14884-900, SP, Brazil.
- Institute of Animal Science (IZ), Beef Cattle Research Center, Rodovia Carlos Tonati 94, Sertãozinho, 13380-011, SP, Brazil.
| | | | - Anielly de Paula Freitas
- Department of Genetics, University of São Paulo (USP), Avenue Bandeirantes 3900, Ribeirão Preto, 14040-905, SP, Brazil
| | - Maria Eugênia Zerlotti Mercadante
- School of Agricultural and Veterinarian Sciences (FCAV), São Paulo State University (UNESP), Via de Acesso Prof. Paulo Donato Castelane, Jaboticabal, 14884-900, SP, Brazil
- Institute of Animal Science (IZ), Beef Cattle Research Center, Rodovia Carlos Tonati 94, Sertãozinho, 13380-011, SP, Brazil
| | | | - Roberta Carrilho Canesin
- Institute of Animal Science (IZ), Beef Cattle Research Center, Rodovia Carlos Tonati 94, Sertãozinho, 13380-011, SP, Brazil
| | - Julia de Paula Soares Valente
- School of Agricultural and Veterinarian Sciences (FCAV), São Paulo State University (UNESP), Via de Acesso Prof. Paulo Donato Castelane, Jaboticabal, 14884-900, SP, Brazil
- Institute of Animal Science (IZ), Beef Cattle Research Center, Rodovia Carlos Tonati 94, Sertãozinho, 13380-011, SP, Brazil
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Rezende VT, Nacimento RA, Ali S, Rodrigues GRD, Romanelli TL, Cyrillo JNDSG, Bonaudo T, Lescoat P, Gameiro AH. Understanding nitrogen dynamics in the Brazilian beef industry: A comprehensive decadal analysis. Sci Total Environ 2024; 921:171045. [PMID: 38402966 DOI: 10.1016/j.scitotenv.2024.171045] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/28/2023] [Revised: 02/14/2024] [Accepted: 02/15/2024] [Indexed: 02/27/2024]
Abstract
Brazil stands as a prominent beef producer and exporter, witnessing major transformations and expansions in its production chain over the past 20 years. These changes have prompted concerns regarding waste generation and environmental pressure. This study employs material flow analysis (MFA) to quantify nitrogen flows throughout the cattle slaughter process and subsequent beef consumption in Brazil, spanning from 2011 to 2021. The analysis encompasses co-production streams like leather, tallow, viscera, and blood. Nitrogen use efficiency (NUE) and the nitrogen cascade indicator (NCI) were used to evaluate efficiency and nitrogen accumulation in the production chain. Nitrogen inputs in the system increased by 8.47 %, while beef production rose by 7.29 %. In contrast, per capita beef consumption decreased by 1.29 kg, despite an overall consumption increase of 2.84 %, attributed to population growth in Brazil. Beef exports witnessed a notable surge of 86.03 %. Conversely, human excreta and food waste losses experienced increments of 10.88 % and 2.84 %, respectively. Examining NUE reveals the highest values during the slaughter phase (90 %), followed by processing, transportation, and storage stages (79-88 %). The consumption phase exhibited the lowest NUE values (29-34 %). Regarding the cumulative nitrogen effect, the NCI varied between 77 % and 82 % throughout the study period. This highlights opportunities for enhancing nitrogen use efficiency, particularly by addressing food waste at the consumer level. Notably, the study observes nitrogen accumulation across the Brazilian beef production chain, potentially contributing to the nitrogen cascade effect and heightening environmental pressure. Recognizing these dynamics provides avenues for targeted improvements, emphasizing the need to address nitrogen-related challenges and enhance sustainability in the beef production and consumption landscape.
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Affiliation(s)
- Vanessa Theodoro Rezende
- University of São Paulo, School of Veterinary and Animal Science, Department of Animal Science, Duque de Caxias Norte Avenue, 225, Campus Fernando Costa, Pirassununga, São Paulo, Brazil; UMR TETIS, AgroParisTech, Montpellier, France; UMR SADAPT, AgroParisTech, Paris, France.
| | - Rafael Araújo Nacimento
- University of São Paulo, School of Veterinary and Animal Science, Department of Animal Science, Duque de Caxias Norte Avenue, 225, Campus Fernando Costa, Pirassununga, São Paulo, Brazil
| | - Sher Ali
- University of Sao Paulo, School of Animal Science and Food Engineering, Department of Food Engineering, Duque de Caxias Norte Avenue, 225, Campus Fernando Costa, Pirassununga, São Paulo, Brazil
| | - Gustavo Roberto Dias Rodrigues
- São Paulo State University, School of Agriculture and Veterinary Science, Campus Jaboticabal, Jaboticabal, São Paulo, Brazil
| | - Thiago Libório Romanelli
- University of São Paulo, Luiz de Queiroz College of Agriculture, Department of Biosystems Engineering, Piracicaba, São Paulo, Brazil
| | | | | | | | - Augusto Hauber Gameiro
- University of São Paulo, School of Veterinary and Animal Science, Department of Animal Science, Duque de Caxias Norte Avenue, 225, Campus Fernando Costa, Pirassununga, São Paulo, Brazil
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Dias Rodrigues GR, da Silva Oliveira E, Rezende VT, França J, Raineri C. Exploring buyer's preferences to propose strategies to improve dog welfare in Brazil. J APPL ANIM WELF SCI 2023:1-12. [PMID: 37968915 DOI: 10.1080/10888705.2023.2282972] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2023]
Abstract
This study aimed to investigate trends and concerns related to the commercialization of dogs in Brazil. The authors analyzed 1,500 ads for the sale of Miniature Schnauzer, Chihuahua, and German Spitz breeds using the methodology of hedonic price analysis. Marginal and relative values of attributes were calculated for puppy sex, coat, age, pedigree, vaccination and deworming, seller type and region, using ordinary least squares. The most valued attributes for each breed were identified as selling by kennels, pedigree, and coat color. The results suggest that this market niche is willing to pay for guarantees of better dog breeding, which represents an opportunity for the development of certification labels for origin and good practices for kennels. Such labels could become an effective strategy to ensure greater transparency and better welfare standards in the Brazilian dog market. This study also provides valuable insights for the development of guidelines and public policies aimed at improving animal welfare and reducing information asymmetry in the pet market.
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Affiliation(s)
| | - Eduarda da Silva Oliveira
- Laboratory of Studies on Agribusiness, School of Veterinary Medicine, Federal University, Uberlândia, Brazil
| | | | - Janine França
- Laboratory of Studies on Agribusiness, School of Veterinary Medicine, Federal University, Uberlândia, Brazil
| | - Camila Raineri
- Laboratory of Studies on Agribusiness, School of Veterinary Medicine, Federal University, Uberlândia, Brazil
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