The objective of this study was to evaluate the lactation curve and milk quality of Saanen goats receiving diets with different forage:concentrate ratios. Twenty goats averaging 59.59 ± 6.97 kg of body weight were assigned to a completely randomized design. The following forage:concentrate ratios were used: 40:60, 50:50, 60:40, 70:30, or 80:20 and provided 2.95, 2.83, 2.70, 2.58, or 2.46 Mcal ME/kg DM, respectively. Animals were confined during 152 days in individual stalls with daily measurements of intake and milk […]

The objective of this trial was to study the production of thirty-five crossbred goats: 1/2Brown Alpine x 12 1/2Moxoto (1/2BA-M), 11 3/4Brown Alpine x 1/4Moxoto (3/4BA-M), and 12 Tricross (1/2Anglo Nubian x 1/4Moxoto x 1/4Brown Alpine). After birth, the kids were separated from their mothers. Goats were milked twice a day and milk composition determined weekly. Animals were housed in collective pens and received a diet composed of sorghum silage (ad libitum) plus concentrate that were formulated to allow 2.5 […]

The objective of this study was to evaluate the genotype x environment interaction for body weight at weaning (WW) and 12 months of age (W12), average daily gain from weaning to 12 months of age (ADG), and performance based on a principal components index (PC) involving these three traits, in a Canchim (5/8 Charolais + 3/8 Zebu) herd. The environment was the season (semester) of birth, and two methods were used to evaluate the genotype x environment interaction: Method 1 […]

Records of 1021 Nelore cows were analyzed in order to evaluate the effect of selection for growth on their stayability in the herd up to five years, considering that they were selected (P5|S). The coded variable (0=culled and 1=not culled) was analyzed with a threshold model. The Nelore cows were born from 1981 to 1997 within the selected (NeS and NeT) and control (NeC) lines of the Experimental Station of Sertãozinho (SP-Brazil). In NeS and NeT the selected (replacement) animals […]

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 […]

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, […]