Data related to weights of animals of the Tabapuã breed, born from 1959 to 1996, in several areas of Brazil, were analyzed with the objective of evaluating the direct and maternal genetic trends, for body weights adjusted for 205 (W205), 365 (W365) and 550 (W550) days of age. The (co)variance component estimates used in the calculation of the breeding values were obtained by the restricted maximum likelihood method (REML), with a model containing the random additive direct, maternal and permanent […]

Thirty ¾ Canchim + ¼ Nelore young bulls with 417 kg of body weight and 15 months of age, were confined during 84 days. The animals were fed with diets composed with corn silage, corn grain, cottonseed meal, soybean meal, whole soybean and mineral mix, adjusted in agreement with the recommendations of the Metabolizable Protein System (MP), Cornell Net Carbohydrate and Protein System (CNCPS) and Intestine Digestible Protein System (PDI), for predicted body weight gain of 1.3 kg/head/day. The daily […]

The objective of this study was to evaluate the performance of growing steers, during the dry season, fed supplements with different protein sources. The treatments were constituted of: mineral mixture (control) (MM), and supplements including the protein sources soybean meal (SBM), cottonseed meal (CM), corn gluten meal, (CGM) and wheat bran (WB). The supplements were supplied ad libitum, by using urea end sodium chloride as intake controller, adjusted at the level that allow to intake 1 kg supplement/day. The average […]

The data utilized in this study were obtained from 23 intacted animals from three different genetic groups: seven Nellore (N), eight ½ Caracu + ¼ Angus + ¼ Nellore (CCAN) and eight ½ Caracu + ¼ Simental + ¼ Nellore (CCSN). These animals were produced as part of an ample project which is being carried out at Embrapa Gado de Corte whose main objective is to identify a genetic group that besides being adapted, is capable to produce meat of […]

Body composition of 42 crossbreed bulls ¼ B. indicus x ¾ B. taurus of either Continental (Guelbvieh) or British (Shorthorn) paternal breed and Caracu x Nelore cows (9 months old and initial empty body weight of 243 kg), were evaluated. Six animals were slaughtered after the adaptation period to obtain the initial body composition. The other 36 animals were fed diets formulated with 9, 15 and 21% of sugar cane bagasse in natura (BIN) and concentrated. There were no significant […]

Data on 23,251 Nelore calves weaned from 1994 to 1997, belonging to Agropecuária Jacarezinho Ltda., were analyzed to estimate the influence of environmental effects of age of dam, julian date of birth and age of calf at weaning on visual scores of conformation (C), precocity (P) and musculature (M). All effects significantly influenced the visual scores. The analyses showed that the calves with the best scores of C, P and M at weaning were those from dams with 7, 8 […]

Production efficiency of a beef cow-calf herd is determined by the ability of the cows in converting the ingested food into calf weight. This ability is related to cow size, fertility and milk production. The present study evaluated efficiency at weaning after first calving of 100 Nellore (N), 47 F1 Guzerath x Nellore (GN), 67 F1 Red Angus x Nellore (RN), 37 F1 Marchigiana x Nellore (MN) and 38 F1 Simental x Nellore (SN) heifers at Estação Experimental Paranavaí/IAPAR. The […]

The objective of this work was to evaluate comparatively the carcass traits and body composition of young Nellore breed intact male, sons of bulls with differentials positive (Selection Lineage) or null (Control Lineage) at weight gain at 378 days of age. Data from 92 Nellore cattle, with 456.00 kg of slaughter weight, being 51 animals of Selection Lineage and 41 animals of Control Lineage. They were raised in cultivated pastures until 18 months of age, when were designated in two […]

Thirty Canchim cows, averaged 471 kg of body weight and 50 months old, were fed with supplement during the dry season of 1998, in order to evaluate the precision of the predicted performance for different systems of diet evaluation. The supplements were composed of corn silage, corn grain, citrus pulp, cottonseed meal, soybean meal and whole soybean, in agreement with the recommendations of the Metabolizable Protein System (MP); Cornell Net Carbohydrate and Protein System (CNCPS); and Intestine Digestible Protein System […]

The main objective of this work was to evaluate the Nellore breed in Brazil with respect to the phenotypic and genetic variation of the mature size of cows. The observations were taken from 34 herds of eleven different beef cattle production regions in the country. There were considered cows of the horned and polled varieties, raised on pastures, from herds that had at least 50 cows. With these restrictions it was formed a general file with 6,867 cows with valid […]