Animal Breeding
Bayesian analyses of genetic parameters for growth traits in Nellore cattle raised on pasture
Authors: F.B. Lopes, J.L. Ferreira, R.B. Lobo and G.J.M. Rosa
This study was carried out to investigate (co)variance components and genetic parameters for growth traits in beef cattle using a multi-trait model by Bayesian methods. Genetic and residual (co)variances and parameters were estimated for weights at standard ages of 120 (W120), 210 (W210), 365 (W365), and 450 days (W450), and f.. Read More»
- Genet. Mol. Res. 16(3):
- gmr16039606
- DOI:
- 10.4238/gmr16039606
Myostatin (GDF8) single nucleotide polymorphisms in Nellore cattle
Authors: A.B. Grisolia1,2, G.T. D�Angelo1, L.R. Porto Neto1, F. Siqueira3 andJ.F. Garcia1
The myostatin gene, also known as GDF8 (growth differentiation factor 8), is located on bovine chromosome 2 (BTA2); it has three exons and two introns. Myostatin is specifically expressed during embryonic development and in adult skeletal muscle, functioning as a negative regulatory protein. Several cattle breeds (Piedmontese, Belgian Blue .. Read More»
- Genet. Mol. Res. 8(3):
- vol8-3gmr548
- DOI:
- 10.4238/vol8-3gmr548
Study of different structures of additive genetic groups to increase the efficiency of genetic selection in beef cattle
Authors: G.A. Oliveira Junior
The structure of genetic groups is a technique that allows animals with unknown paternity to be included in genetic evaluation programs. The ways these groups are formed are still arbitrary, making it important to study different formation strategies for genetic groups, aiming for a suitable framework for the genetic evaluatio.. Read More»
- Genet. Mol. Res. 13(1):
- 2014.January.10.1
- DOI:
- 10.4238/2014.January.10.1
Genetic trends of absolute and relative heart weight in a male broiler line
Authors: Gaya LG, Costa AMMA, Ferraz JBS, Rezende FM, Mattos EC, Eler JP, Michelan Filho T, Mourao GB and Figueiredo LGG
Data of chickens from a broiler-breeding program have been collected and used for determination of genetic trends of absolute and relative heart weight. The genetic trends have been estimated by regression of the genetic values of the traits over hatch-year. Genetic values of 42,912 individuals, obtained by restricted maximum .. Read More»
- Genet. Mol. Res. 6(4):
Estimates of genetic trend for carcass traits in a commercial broiler line
Authors: J.L.B.M. Grosso J.C.C. Balieiro J.P. Eler J.B.S. Ferraz E.C. Mattos T. Michelan Filho A.M. FelÃ?Âcio F.M. Rezende
Data from the slaughter of 24,001 chickens that were part of a selection program for the production of commercial broilers were used to estimate genetic trend for absolute carcass (CW), breast meat (BRW), and leg (LW) weights, and relative carcass (CY), breast meat (BRY), and leg (LY) weights. The components of (co)variance an.. Read More»
- Genet. Mol. Res. 8(1):
- vol8-1gmr551
- DOI:
- 10.4238/vol8-1gmr551
Genetic trend estimates of meat quality traits in a male broiler line
Authors: G.B. MourÃ?£o, L.G. Gaya, J.B.S. Ferraz, E.C. Mattos, A.M.M.A. Costa, T. Michelan Filho, O.C. Cunha Neto, A.M. FelÃ?Âcio and J.P. Eler
The present research was conducted to estimate the genetic trends for meat quality traits in a male broiler line. The traits analyzed were initial pH, pH at 6 h after slaughter, final pH, initial range of falling pH, final range of falling pH, lightness, redness, yellowness, weep loss, drip loss, shrink loss, and shear force. .. Read More»
- Genet. Mol. Res. 7(3):
- vol7-3gmr479
- DOI:
- 10.4238/vol7-3gmr479
Genetic trends of abdominal fat content in a male broiler chicken line
Authors: Leila de Genova Gaya, Gerson Barreto MourÃ?£o, Fernanda Marcondes de Rezende, ElisÃ?¢ngela Chicaroni de Mattos, TÃ?©rcio Michelan Filho, LuÃ?Âs Gustavo Girardi Figueiredo, JosÃ?© Bento Sterman Ferraz1 and Joanir Pereira Eler
Data of chickens from a broiler-breeding program were collected and used to determine the genetic trends of absolute and relative abdominal fat content. The genetic trends were estimated by the regression of trait genetic value averages on hatch-years. Genetic values from 32,485 individuals were used for regression analysis. T.. Read More»
- Genet. Mol. Res. 4(4):
Polymorphisms in the leptin gene promoter in Brazilian beef herds
Authors: R.C. Guimar�£es, J.S.N. Azevedo, S.C. Corr�ªa, J.E.G. Campelo, E.M. Barbosa, E.C. Gon�§alves and E. Silva Filho
Brazil is the world’s largest producer of beef cattle; however, the quality of its herds needs to be improved. The use of molecular markers as auxiliary tools in selecting animals for reproduction with high pattern for beef production would significantly improve the quality of the final beef product in Brazil. The leptin.. Read More»
- Genet. Mol. Res. 15(4):
- gmr15048981
- DOI:
- 10.4238/gmr15048981