The objective of this study was to evaluate the effects of genetic and non genetic factors on cow weight at calving (CWC) of Nellore and 1/2 Canchim + 1/2 Nellore cows, mated to Canchim (5/8 Charolais + 3/8 Zebu) and Charolais breed bulls, respectively, and also on the gestation length (GL) of their calves, and the weights (W) and ages (A) at first insemination (FI), conception (FCo), and calving (FC) of 1/2 Canchim + 1/2 Nellore heifers. The least squares […]

This study was conducted using data from single crosses (diallel) withim three female lines (PP, KK and VV). A completely randomized block design, with 81 single crosses treatments, three replicales with 81 broilers was used. The twelve production traits were: egg number during the periods of 24th-32nd, 32nd-40th, 40th-48th, 48th-56th, 56th-64th, 22nd-66th, 32nd-66th, 40th-66th, 48th-66th, 24th-40th, 24th-48th and 24th-56th weeks of age. The first two principal components explained more than 98% of total variance of the crosses means. In the […]

Two hundred and forty male broilers, Hubbard strain, with average 689±5.27 g LW maintained, from 22 to 42 days of age under heat stress (31.9±0.29ºC) conditions were used. A completely randomized design, with five treatments (3000, 3075, 3150, 3225 and 3300 kcal metabolizable energy/kg of diet), six replicates and eight animals per experimental unit was used. The effects of different levels of metabolizable energy (ME) levels on the performance, carcass quality and physiological variables of broilers fed isoproteic diets, in […]

To study the effect of age upon ovulatory and fertility traits, 147 cycles of 99 mares were grouped in different age classes (1 – 3-6 years; 2 – 7-10 years; 3 – 11-14 years, and 4 – 15-19 years), according to the year of birth. The mares were inseminated with diluted, cooled and transported semen of one stallion only, three times a week (Monday, Wednesday and Friday). The follicular control, based on rectal palpation, and the teasing were conduced every […]

The objective of this work was to study birth (BW) and weaning (WW) weights, and birth weight/cow weight at calving (BWR) and weaning weight/cow weight at calving (WWR) ratios of 1/2 Canchim + 1/2 Nellore and 1/2 Charolais + 1/4 Canchim + 1/4 Nellore calves out of straightbred Nellore and crossbred 1/2 Canchim + 1/2 Nellore cows, and sired by Canchim (5/8 Charolais + 3/8 Zebu) and Charolais bulls, respectively. Analyses of variance were carried out separately for each genetic […]

The objective of this work was to determine the multiplicative factors to estimate the milk production (DP) based on the morning (MM) or afternoon (AP) milk yield and their were obtained of 3,632 lactations from 2,143 cows of the Gir breed, daughters of 335 sires, from 1993 to 1996 records. The calving year (Y) lactation length – linear (LL), calving age – linear and quadratic (A) and a factor K (the possible double, triple and quadruple interactions among management level […]

To evaluate the effects of cytoplasm lineage (CL) the body weight (BW, n = 707) and greasy fleece weight (FW, n = 703) of females and fiber wool diameter (FD, n = 350 males) of males sheep from yearling Merino sheep were used. The pedigree information included 3,645 animals and an average of 10 generations. The Maximum Restricted Likelihood methodology and animal models that included the direct genetic, direct and CL effects, direct, maternal and CL effects and direct, maternal, […]

The experiment was carried out to evaluate the effect of different levels of broiler litter (15 and 30%), associated or not to a supplement based on bovine lyophilized ruminal microbiota (0 and 10 g/anim.day), in Holstein/Zebu steers feeding. Four steers fistulated in the rumen and abomasum were allotted to a 4 x 4 latin square in a 2 x 2 factorial arrangement (level of broiler litter x with or without ruminal microbiota), full fed individually. The ruminal microorganisms composition, efficiency […]

Two experiments were conducted to evaluate the performance and nutrient digestibility (dry matter, organic matter and gross energy, and the metabolization coefficient of the gross energy) of triticale based diets. The treatments consisted in a corn and soybean meal based diet and three other ones with corn 33, 66 and 100% of substitution of corn by triticale. In the first experiment, 144 pigs in the growing phase (25.27-59.60 kg LW) were allotted to a randomized block design, with four treatments, […]

The objective of this work was to evaluate the effect of different techniques of moisture reduction on the chemical composition, in vitro deseapperance of dry matter (IVDMD) and ruminal dry matter disappearance of the elephant grass (Pennisetum purpureum Schum), cv. Taiwan A-148 silage. The treatments (A, control, B, 20, C, 30, D, 40% of corn cobs; E, wilting by 12 h, F, wilting by 24 h; G, crushing + wilting by 24 h) were allotted to a completely randomized design […]