The genetic potential for any animal growth depends basically on the environmental conditions like competition for space, foods, oxygen. This experiment was conducted with the objective of evaluating the fingerlings growth of a ornamental fish (Trichogaster trichopterus), submitted to three stocking densities and three feeding levels. The fishes (average weight of 0.56 g ± 0.09 and 0.96 g ± 0.13) were divided in two blocks, submitted to three densities (5, 10 and 15 fishes/aquaria) and fed at levels of 3, […]

Alfalfa crop (19.0% DM) was harvested at 35 days and ensiled in 32 plastic experimental silos, consisting of four treatments with or without 12% of citrus pulp: control, Sil-Allâ (S. faecium, P. acidilactici, L. plantarum, amylase, hemicellulase, and cellulase), Silobacâ (L. plantarum, S. faecium, and Lactobacillus sp.) and Pioneer 1174â (S. faecium and L. plantarum). Silos were opened 133 days after ensiling and sampled to proceed chemical analyses. Only in citrus pulp-free silage, all inoculants increased ethanol concentration; Pioneer increased […]

The birdsfoot trefoil cv. São Gabriel is an important winter-spring growing legume in the Southern Brazil, which main limitation is the low persistence under grazing. The objective of this work was to evaluate eight populations of this cultivar, selected under grazing or cut, comparing with one rhizomatous genotype (cv. ARS-2620) and a cultivar from Uruguay without rhizomes (cv. Trueno), with the purpose to evaluate the morphological variability and characters linked to grazing tolerance. Two assays were conducted in the greenhouse […]

This work was carried out to characterize agronomically birdsfoot trefoil (Lotus corniculatus L.) genotypes, including eight populations derived from the cultivar São Gabriel, one rhizomatous cultivar (ARS-260) and one cultivar without rhizomes (Trueno). Individual plants were submitted to seven cuts under field conditions during one year, at Passo Fundo, Rio Grande do Sul, Brazil. The genotypes showed variability relative to internode lenght, height, diameter, legume lenght, forage production and nutritive value. On the average, the populations and the cv. Trueno […]

Silages of thirteen cultivars of sunflower (Helianthus annuus L.) were evaluated for chemical characteristics and in vitro dry matter digestibility (IVDMD). The silages were produced when the plants presented above 90% of ripe grains. The experimental procedure followed a entirely randomized design and the mean values were compared by SNK test (P<.05). The smallest content of dry matter, 19.8%, was obtained for the hybrid M737, and the highest were observed for Contiflor 7, with 31.2%, and Cargill 11, with 32.2%. […]

Seven populations with different genetic means and different data structures resulting from replacing 0, 10, 25, 50, 75, 90 and 100% of sires simulated by GENESYS program were used to compare the mixed-model methodology (MMM) with the GenSys methodology, according to the accuracies and predicted error variances (PEV) of the breeding values, estimated under a sire or an animal model. Under the sire model, lower accuracy and greater PEV for both methodologies were observed as selection intensity increased, due to […]

The aim of this study was to evaluate follicular population during estrous cycle in Gir cattle. The ovaries of cows (14) were evaluated daily, during one estrous cycle, using a portable ultrasound device. During each exam, ovarian follicles were identified, measured and classified by size in tree groups: from 3 to 5 mm (small follicles), from 6 to 8 mm (medium follicles) and equal or larger than 9 mm (large follicles). Cycles with three (69.23%) and four (30.77%) follicular waves […]

The data analyzed were live weights of females (3475) of six genetic groups obtained by crossing red and white Holstein-Friesian (HVB) x Guzerá (Guz), with expected HVB gene fractions 1/4, ½ (F1) , 5/8 (from inter se mating), 3/4, 7/8 and > 31/32. The data were separately analyzed for 374 calves (up to age 120 d) and 524 heifers (121 to 550-d-old), using Proc Mixed of the SAS package, under a model including the fixed effects of genetic group (G), […]

Monthly weights (18.089) of 412 females on a demonstration farm in the Zona da Mata, Minas Gerais State, were used to develop a model to describe the liveweight of cows, heifers and calves. The data were analyzed using Proc Mixed of the SAS package, separately for the following categories: a) cows, b) heifers older than 12 mo., c) heifers 70-d to 12 mo-old and d) female calves up to 70 d. For each of these, the regression equations of weight […]

The effects of month, year, order and type parturition on mating weight (MW), weight gain during gestation (WG), respectively, of 753 and 527 Caninde native goats, 463 and 333 exotic Anglo Nubian and 374 and 296 Alpine goats, 151 and 87 crossbred ½ Alpine ½ SRD, and 92 and 73 ¾Alpine ¼SRD goats, raised in the Experimental Station of the Governmental Research Institute (EMEPA-PB), Soledade – Paraiba – Brazil, in the period from 1980 to 1994. The effect of month […]