Feed costs comprise the majority of variable expenses in beef cattle systems making feed efficiency an important economic consideration within the beef industry. Due to the expense of recording individual feed intake phenotypes, a genomic-enabled approach could be advantageous towards improving this economically relevant trait complex. A genome-wide association study (GWAS) was performed using ...

The control of the immune system pigs after weaning is important in pig farming because productivity depends on survival post-weaned pigs. Previously, antibiotics would have been administered case infectious diseases to increase rate pigs, but now, use strictly restricted order prevent other problems such as occurrence antibiotic-resistant pathogens. In this study, effect fermented kefir a func...

Variation in residual feed intake, that is, variation in feed intake in relation to liveweight (LW) and growth rate, was investigated using data from 540 progeny of 154 British Hereford sires, collected over ten 200-day postweaning performance tests conducted between 1979 and 1988. Residual feed intake (RFI ) was calculated for each test as the difference between Reg actual feed and expected fe...

Abstract Virginiamycin (VM) is an antibiotic that possesses antimicrobial properties due to its ability block protein synthase in Gram-positive bacteria. It reduces lactic acidosis and the incidence of liver abscesses. Animal growth development brought about because improved ruminal health, animal health welfare. This study evaluated continuous or intermittent provision VM during growing finish...

Two half-sib families of backcross progeny were produced by mating F(1) Line 1 Hereford (L1) x composite gene combination (CGC) bulls with L1 and CGC cows. Feed intake and periodic weights were measured for 218 backcross progeny. These progenies were genotyped using 232 microsatellite markers that spanned the 29 BTA. Progeny from L1 and CGC females was analysed separately using composite interv...

The oxygen (O2) consumption, carbon dioxide (CO2) production, heat production (HP) and milk nutrient intake of 22 litters of suckling piglets were recorded every 4 days from the day after birth to weaning at 22 days of age. At weaning, 147 representative piglets of these litters were slaughtered to measure their chemical composition and to calculate the energy and nutrient balance of individual...

This study was undertaken to determine the influence of three grazing pressures [high (HGP), medium (MGP) and low (LGP), corresponding to 30, 50 and 75 g available DM/kg BW/day, respectively] on the performance of lambs grazing Lolium perenne and Dactylis glomerata pastures in spring. Feed intakes and average daily live weight gains (ADG in g/day) were determined for each group. In general inta...

Increasing cost and scarcity of maize has stimulated the use of alternative feed sources (AFS) in the diets of cattle. In this study, we investigated the effects of partial or total replacement of maize on nutrient digestibility, growth performance, blood metabolites, and economics in Limousin crossbred feedlot cattle. Forty-five Limousin×Luxi crossbred bulls were randomly assigned to the three...

Objective: To determine approximate time and severity of a porcine proliferative enteropathy (PPE) outbreak in a herd with a history of PPE; to compare average daily gain (ADG), average daily feed intake (ADFI), feed efficiency (F:G), and clinical impression of disease in clinically affected nonmedicated controls versus pigs medicated with 110 ppm (100 g per ton) of tylosin for 21 days followed...

Abstract The period of heifer development is a relatively small fraction cow’s life; however, her pattern growth may have permanent effects on productivity as cow. We hypothesized that altering the during peri-pubertal would increase life-time across genetic types Bos taurus cows. objective was to determine stayability, calf production, and weight weaned six crops. Heifers (n = 685) were placed...