The objective of this study was to map quantitative trait loci (QTL) in chromosomes 9, 10 and 11 of swines (Sus scrofa) and to associate their effects on traits of carcass, carcass cuts, organs and guts, performance and meat quality. Samples of DNA of animals from a F2 population originated from crosses between Piau breed males and Landrace õ Large White õ Pietrain females were used. A total of 13 microsatellite loci were used to build link maps of the […]

The objective of this study was to evaluate the effects of culture time and sex of nuclei donor cells on embryo and fetal development after nuclear transfer. Thus, bovine oocytes were matured, enucleated and reconstructed with somatic cells from an adult animal. After fusion and chemical activation, the reconstituted zygotes were cultured in Charles Rosenkranz 2 (CR2) on a granular monolayer cell at 38.8ºC in a humidified atmosphere 5% CO2 in air for seven days, and transferred to synchronized receptors. […]

Lactation curves were fitted from 1,340 lactations of F1 Holstein-Gyr, Holstein-Guzerat, Holstein-Nellore and Holstein-Undefined Zebu crossbred cows from two farms with milk controls carried out every 14 days. Nutritional management was based on pastures in the summer, and corn silage and sugar cane with urea during winter and concentrated rations in the milking, according to the production. Incomplet Gamma function was used for estimating parameters of curves, production during lactation peak and of the time from the beginning of lactation […]

Records of Large White breed animals were used to estimate variance components, genetic parameters and trends for the character total number of born piglets (TNBP) as measure of litter size. For obtaining variance components and genetic parameters, it was used the Restricted Maximum Likelihood Method using MTDFREML software. Two mixed models (additive and repeatability) were evaluated. The additive model contained fixed effect of the contemporary group and the following random effects: direct additive genetic and residual effect for the first […]

To estimate dry matter intake and to evaluate variation on live weight of heifers, an experiment was conducted from March to July 2003, with the following supplementation strategies: no supplementation (control), cottonseed cake (1 kg); spineless cactus (10 kg); spineless cactus + 0.5 kg of cottonseed cake (5 kg). Dry matter intake of native pasture was not affected by supplementation, but it affected total dry matter intake. Intake of total dry matter (DM) differed among breeds with values of 5.44 […]

This work was performed aiming to evaluate the morphogenetic and structural characteristics of Andropogon gayanus cv. Planaltina species submitted to three cutting heights (20, 27 and 34 cm). The three cutting heights were allocated in experimental units (12 m2) in a complete randomized block design with three replications. The cuts were done when the light interception by the sward reached 95%. At this moment, the sward height revealed itself constant with values close to 50 cm. The lowest cutting height […]

This research was carried out at to evaluate the variability and heritability of morphologic traits in 54 elephant grass clones (three local controls and 51 from the RENACE/CNPGL) in the Forest Zone in Pernambuco. It was used a complete randomized block design with additional controls. Three cuts were performed on the 60th day of regrowth. There were significant differences for stem diameter, basal and aerial tillers density, width of leaf 3, length of leaf 5, leaf blade percentage, stem percentage, […]

This study was carried out aiming to evaluate the structural characteristics of Brachiaria decumbens cv. Basilisk pasture. Four heights of plants (10, 20, 30 and 40 cm) were evaluated within the same grazing area in a randomized block experimental design with two repetitions. Variation in the initial height of the signal grass pasture plant showed a linear and a negative response. The masses of green leaf blade mass, live stem, dead material, live forage and total forage linearly increased with […]

The objective of this study was to evaluate the effect of the cattle feces location on the characteristics of vegetative and reproductive tillers, dry mass content in plant components, forage volumetric density and Brachiaria decumbens cv. Basilisk pasture height managed under continuous stocking. It was used a randomized block design with three repetitions in a split-plot scheme considering the plots the sites next and far from feces and the sub-plots were the vegetative and reproductive tiller categories. Dry mass content […]

It was evaluated morphogenetic and structural characteristics of the canopy of Brachiaria brizantha cv. Marandu under continuous grazing during the wet season, in different forage supplies and grazing cycles. A random block experimental design was used in a split-plot scheme with three replicates. It was evaluated in the plots the plots, the effects of forage supplies (4,7, 10 and 13% BW/day) and in the subplots, the effects of grazing cycles were evaluated. All the variables differed among grazing cycles, proving […]