Hostname: page-component-78c5997874-ndw9j Total loading time: 0 Render date: 2024-11-10T13:38:36.170Z Has data issue: false hasContentIssue false
  • English
  • Français

Estimates of genetic parameters for visual scores and daily weight gain in Brangus animals

Published online by Cambridge University Press:  05 January 2011

S. A. Queiroz ,
J. A. Oliveira ,
G. Z. Costa  and
L. A. Fries
S. A. Queiroz*
Affiliation:
Departamento de Zootecnia, FCAV, UNESP, Via de acesso Prof. Paulo Castelane, s/n, 14884-900, Jaboticabal, São Paulo, Brazil
J. A. Oliveira
Affiliation:
Departamento de Ciências Exatas, FCAV, UNESP, Jaboticabal, São Paulo, Brazil
G. Z. Costa
Affiliation:
Animal Breeding Consultant, Rua Américo Brasiliense, 870, Ap. 303, 14015-050, Ribeirão Preto, São Paulo, Brazil
L. A. Fries
Affiliation:
GenSys Consultores Associados S/C Ltda, Rua Juca Quito, 800, 14870-260, Jaboticabal, São Paulo, Brazil
*
†E-mail: saquei@fcav.unesp.br
Get access

Abstract

(Co)variance components were estimated for visual scores of conformation (CY), early finishing (PY) and muscling (MY) at 550 days of age (yearling), average daily gain from weaning to yearling (GWY), conformation (CW), early finishing (PW) and muscling (MW) scores at weaning, and average daily gain from birth to weaning (GBW) in animals forming the Brazilian Brangus breed born between 1986 and 2002 from the livestock files of GenSys Consultants Associados S/C Ltda. The data set contained 53 683; 45 136; 52 937; 56 471; 24 531; 21 166; 24 006 and 25 419 records for CW, PW, MW, GBW, CY, PY, MY and GWY, respectively. Data were analyzed by the restricted maximum likelihood method using single- and two-trait animal models. Direct heritability estimates obtained by single-trait analysis were 0.12, 0.14, 0.13 and 0.14 for CY, PY and MY scores and GWY, respectively. A positive association was observed between the same visual scores at weaning and yearling, with correlations ranging from 0.64 to 0.94. Estimated correlations between GBW and weaning and yearling scores ranged from 0.60 to 0.77. The genetic correlation between GBW and GWY was low (0.10), whereas correlations of 0.55, 0.37 and 0.47 were observed between GWY and CY, PY and MY, respectively. Moreover, GWY showed a weak correlation with CW (0.10), PW (−0.08) and MW (−0.03) scores. These results indicate that selection of the traits that was studied would result in a small response. In addition, selection based on average daily gain may have an indirect effect on visual scores as the correlations between GWY and visual scores were generally strong.

Keywords

heritabilitycorrelationsconformationearly finishingmuscling
Type
Full Paper
Information
animal , Volume 5 , Issue 6 , June 2011 , pp. 838 - 843
Copyright
Copyright © The Animal Consortium 2011

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Boldman, KG, Kreise, LA, Van Vleck, LD, VanTassel, CP, Kachaman, GD 1995. A manual of MTDFREML. A set of programs to obtain estimates of variances and covariances (DRAFT). Agricultural Research Service, Lincoln, NE, USA.Google Scholar
Cardoso, FF, Cardellino, RA, Campos, LT 2004. Componentes de (co)variância e parâmetros genéticos de caracteres pós-desmama em bovinos da raça Angus. Revista Brasileira de Zootecnia 33, 313–319.CrossRefGoogle Scholar
Costa, GZ, Queiroz, SA, Oliveira, JA, Fries, LA 2008. Estimativas de parâmetros genéticos e fenotípicos de escores visuais e de ganho médio de peso do nascimento a desmama de bovinos formadores da raça Brangus. Ars Veterinária 24, 172–176.Google Scholar
Dal-Farra, RA, Roso, VM, Schenkel, FS 2002. Efeitos de ambiente e heterose sobre o ganho de peso do nascimento ao desmame e sobre os escores visuais ao desmame de bovinos de corte. Revista Brasileira de Zootecnia 31, 1350–1361.CrossRefGoogle Scholar
Eler, JP, Ferraz, JBS, Silva, PR 1996a. Parâmetros genéticos para peso, avaliação visual e circunferência escrotal na raça Nelore, estimados por modelo animal. Arquivo Brasileiro de Medicina Veterinária e Zootecnia 48, 203–213.Google Scholar
Eler, JP, Ferraz, JBS, Silva, PR 1996b. Estimação simultânea de parâmetros genéticos para características de importância econômica na raça Nelore, com utilização de modelos animais. In Reunião anual da sociedade brasileira de zootecnia, pp. 99–101. Revista Brasileira de Zootecnia, Fortaleza, Brazil.Google Scholar
Faria, CU, Magnabosco, CU, Albuquerque, LG, Bezerra, LAF, Lôbo, RB 2009. Avaliação genética de características de escores visuais de bovinos da raça Nelore da desmama até a maturidade. Revista Brasileira de Zootecnia 38, 1191–1200.CrossRefGoogle Scholar
Koots, KR, Gibson, JP, Wilton, JW 1994. Analyses of published genetic parameter estimates for beef production traits. 2. Phenotypic and genetic correlations. Animal Breeding Abstracts 62, 825–853.Google Scholar
Koury Filho, W 2001. Análise genética de escores de avaliações visuais e suas respectivas relações com o desempenho ponderal na raça Nelore. Master thesis, The University of São Paulo.Google Scholar
Kriese, LA, Bertrand, JK, Benyshek, LL 1991. Genetic and environmental growth trait parameter estimates for Brahman and Brahman-derivative cattle. Journal of Animal Science 69, 2362–2370.CrossRefGoogle ScholarPubMed
Marcondes, CR, Bergmann, JAG, Eler, JP, Ferraz, JBS, Pereira, JCC, Penna, VM 2000. Análises de alguns critérios de seleção para características de crescimento na raça Nelore. Arquivo Brasileiro de Medicina Veterinária e Zootecnia 52, 83–89.CrossRefGoogle Scholar
Muniz, CASD, Carvalheiro, R, Fries, LA, Queiroz, SA 2005. Critérios de seleção na pré-desmama em bovinos da raça Gir. 1. Estimativas de parâmetros genéticos. Revista Brasileira Zootecnia 34, 807–815.CrossRefGoogle Scholar
Nicholson, MJ, Butterworth, MH 1986. A guide to condition scoring of Zebu cattle. International Livestock Center for Africa, Addis Abeba, Ethiopia.Google Scholar
Pons, SB, Milagres, JC, Regazzi, AJ 1990a. Efeitos de fatores genéticos e de ambiente sobre o crescimento e o escore de conformação em bovinos Hereford no Rio Grande do Sul: III – Peso e escore de conformação ao sobreano. Revista Brasileira de Zootecnia 19, 77–89.Google Scholar
Pons, SB, Polastre, R, Cardellino, RA 1990b. Correlações genéticas e fenotípicas entre características ponderais e de conformação à desmama em bovinos Hereford. In Reunião Anual da Sociedade Brasileira de Zootecnia, pp. 480. Revista Brasileira de Zootecnia, Campinas, Brazil.Google Scholar
Sarmento, JLR, Pimenta Filho, EC, Ribeiro, MN, Martins Filho, R 2003. Efeitos ambientais e genéticos sobre o ganho em peso diário de bovinos Nelore no Estado da Paraíba. Revista Brasileira de Zootecnia 32, 325–330.CrossRefGoogle Scholar
Snelling, WM, Allan, MF, Keele, JW, Kuehn, LA, McDaneld, T, Smith, TPL, Sonstergard, TS, Thallman, RM, Bennett, GC 2010. Genome-wide association study of growth in crossbred beef cattle. Journal of Animal Science 88, 837–848.CrossRefGoogle ScholarPubMed
Teixeira, RA, Albuquerque, LG 2003. Efeitos ambientais que afetam o ganho de peso pré-desmama em animais Angus, Hereford, Nelore e mestiços Angus-Nelore e Hereford–Nelore. Revista Brasileira de Zootecnia 32, 887–890.CrossRefGoogle Scholar