Thirty crossbred sows averaging 118.18±12.2 kg of BW, backfat thickness of 13.82±1.42 mm and 220 days old were assigned to a completely randomized design in a split plot scheme with 10 replicates and parturition orders included in the plots (3 x 3 factorial arrangement) and CP ingestion levels (10.0, 13.5, and 17.0%) in the sub-plots. The effects of dietary CP ingestion levels on female performance in three complete successive reproductive cycles were evaluated during the pregnancy. Sow weight gain in […]

A Bayesian marker-free segregation analysis was applied for the estimation of variance components and to search for evidence of segregation genes affecting two carcass traits: intramuscular fat (IMF), %, and backfat thickness (BF), mm ; and one growth trait: body weight gain (LG) from 25 to 90 kg, approximately, g/day. In this study, 1,257 animals from the F2 design produced by breeding among pigs Meishan (male) and Dutch Large White and Landrace lines (female) were used. In animal breeding, finite […]

To obtain slaughter weight and age and the carcass characteristics of young bulls, a feedlot study was conducted at Embrapa Pecuária Sudeste. A total of 215 animals from Embrapa and private farms, 3/8 and ½ Blonde d´Aquitaine x Nellore; ½ Canchim x Nellore; ½ Limousin x Nellore; ½ Piedmontese x Nellore; Canchim (CA) and Nellore (NE), were used in 1994, 1995 and 1997. The slaughter weights (TRAT) of 400 (I); 440 (II) and 480 kg (III), except for NE cattle […]

The objective of this work was to estimate the correlations among measurements taken in vivo with ultrasound equipment with some carcass characteristics measured after slaughter. Twenty two Nellore steers, with average shrunk body weight of 279 kg and 24 months of age, were fed by 98 days with high concentrate diets. The shrunk body weight, the ribeye area (AOLU) and the fat thickness (EGSU) over the Longissimus dorsi muscle between 12ª and 13ª ribs, were measured at 28 days intervals. […]

Forty-eight female pigs slaughter at 50, 60, 70, 80, 90, 100, 110 and 120 kg were used to determine commercial cut and of lean meat yields in pork carcass, with a view of the Longissimus muscle area and backfat thickness estimation by using the real-time ultrasound technology. Live ultrasonic measurements were taken for Longissimus muscle area and for backfat thickness and measures in the hot carcass were made, using optical Henessy equipment, to estimate the backfat thickness and Longissimus muscle […]

Forty-eight female pigs were used to determine the commercial cut yields after slaughter of the animals at 50, 60, 70, 80, 90, 100, 110 and 120 kg and dissection of the carcasses. Life ultrasonic measures were taken to measure the longissimus muscle area and for backfat thickness. The predictors used to estimate the lean meat yield were backfat thickness and longissimus muscle area. Besides the measures made in the different cuts, as ham cut weight, ham muscle weight, palette muscle […]