Research Article

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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

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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

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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

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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

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