Research Article

Related GMR Articles

12/15/2005
Abdominal fat; Animal breeding; Broilers; Genetic trend; Genetic value

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. The genetic trend estimate for absolute abdominal fat content ... more

Lde Genova Gaya; G.Barreto Mourão; F.Marcondes de Rezende; E.Chicaroni de Mattos; T.Michelan Filho; L.Gustavo Gi Figueiredo; J.Bento Ster Ferraz; J.Pereira Eler
07/21/2009
Animal breeding; DNA sequencing; Double muscling; Meat production; Single nucleotide polymorphisms

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 and Blond’Aquitaine, and others) show poly­ ... more

A.B. Grisolia; G.T. D’Angelo; L.R.Porto Neto; F. Siqueira; J.F. Garcia
08/26/2008
Animal breeding; broiler; Genetic trend; meat quality; poultry quality

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. The number of observations varied between 618 and 2125 for each ... more

G.B. Mourão; L.G. Gaya; J.B.S. Ferraz; E.C. Mattos; A.M.M.A. Costa; M. Filho; O.C.Cunha Neto; A.M. Felício; J.P. Eler
01/10/2014
Animal breeding; Correlation; Multiple sire; Pedigree; Unknown paternity

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 evaluation of seedstock in animal breeding programs. Therefore, the aim ... more

G.A.Oliveira Junior
11/28/2012
Genetic bean plant breeding; Genetic gain; Progeny x environment interaction; Quantitative genetics; Simultaneous selection

Breeders normally select simultaneously for several traits in various environments. We investigated the effects of the progeny x environment interaction on success in selection for several traits. The population used was obtained from a cross between the CVIII-85-11 line, which has a semi-erect to prostrate plant architecture and a cream with brown streaks bean type, and the BRS-Supremo ... more

L.K. Lima; M.A.P. Ramalho; A.F.B. Abreu
04/26/2013
Breeding value; China; Genetic parameter; Rainbow trout

Genetic parameters and breeding values for growth traits were estimated in the first and, currently, the only family selective breeding program for rainbow trout (Oncorhynchus mykiss) in China. Genetic and phenotypic data were collected for growth traits from 75 full-sibling families with a 2-generation pedigree. Genetic parameters and breeding values for growth traits of rainbow ... more

G. Hu; W. Gu; Q.L. Bai; B.Q. Wang
08/16/2012
Breeding value; Candidate gene; Chicken; Economic trait; Single nucleotide polymorphism

Neuropeptide Y (NPY) and gonadotrophin-releasing hormone receptor (GnRHR) are two candidate genes with a wide variety of physiological functions in growth and especially in reproduction processes. We examined the association of one SNP from each of these genes with growth- and egg production-related traits in Mazandaran native chickens. Two hundred and six individuals were genotyped by ... more

S.A. Fatemi; H. Mehrabani-Yeganeh; A. Nejati-Javaremi; S. Niknafs
05/23/2014
Beef cattle; Breeding value; Genetic evaluation; Selection index; Sire ranking

For genetic evaluation of beef cattle, univariate or bivariate analyses are often performed as an alternative to decrease the complexity of matrices and mathematical models compared to multivariate analysis, which considers a larger number of joint traits. The use of bivariate methods to calculate genetic predictors may cause bias in the estimation of breeding values and, as a ... more

V.B. Pedrosa; E. Groeneveld; J.P. Eler; J.B.S. Ferraz
10/05/2007
Animal breeding; Ascitic syndrome; Genetic value; Sudden death syndrome

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 likelihood, were used for regression analysis. The estimates ... more

L.G. Gaya; A.M.M.A. Costa; J.B.S. Ferraz; F.M. Rezende; E.C. Mattos; J.P. Eler; M. Filho; G.B. Mourão; L.G.G. Figueiredo
03/14/2005
Asparagus officinalis; Genetic correlations; Genetic gain

Despite the continuous breeding that has been conducted with asparagus (Asparagus officinalis L.) since the beginning of the last century, there is little information on parameters for predicting direct and indirect selection response. Yield traits for blanched asparagus production were studied along a two-year period in a half-sib family population planted in Zavalla, ... more

I. Gatti; F.López Anido; V. Cravero; P. Asprelli; E. Cointry

Pages