Modeling long-term crop-pasture rotations productivity and carbon and nitrogen cycling considering soil carbon saturation.
Impact of "Raised Without Antibiotics" beef cattle production practices on occurrences of antimicrobial resistance.
The specific antimicrobial resistance (AMR) decreases that can be expected from reducing antimicrobial (AM) use in United States (US) beef production have not been defined. To address this data gap, feces were recovered from 36 lots of ?raised without antibiotics? (RWA) and 36 lots of ?conventional? (CONV) beef cattle. Samples (N = 719) were collected during harvest and distributed over a year. AMR was assessed by:i) culture of six AM-resistant bacteria (ARB); ii) qPCR for 10 AMR genes (ARGs); iii) an qPCR array of 84 ARGs; and iv) metagenomic sequencing.
Effect of growth rate on beef fatty acid profile from Hereford steers finished either on pasture or in feedlot.
Abstract:Different nutritional management during the rearing and finishing periods can determine changes on beef fatty acid profile. Beef lipid composition was quantified in 224 male Hereford calves weaned at 8 wk of age with an average initial live weight (LW) of 170 ± 17 kg. After weaning, 4 nutritional treatments were imposed to obtain different daily LW gains (LWG; kg/d) during the first winter. Nutritional management groups were high LWG in feedlot (HF), low LWG in feedlot (LF), high LWG in pasture (HP), and low LWG in pasture (LP).
Genomic regions and pathways associated with resistance to gastrointestinal parasites in tropical sheep breed.
Abstract. The aim of this study was to estimate variance components and to identify genomic regions and pathways associated with resistance to gastrointestinal parasites, particularly Haemonchus contortus, in Santa Inês sheep, a Brazilian breed adapted to tropical climate. The degree of anemia assessed by the FAMACHA card (FAM) and the egg counts per gram of feces (EPG) were evaluated to verify the resistance to gastrointestinal parasites. A total of 576 animals were genotyped using 12,785 SNPs of the Ovine SNP12k BeadChip (Illumina, Inc.).
Genomic regions and pathways associated with gastrointestinal parasites resistance in Santa Inês breed adapted to tropical climate.
Abstract Background:The aim of this study was to estimate variance components and to identify genomic regions and pathways associated with resistance to gastrointestinal parasites, particularly Haemonchus contortus, in a breed of sheep adapted to tropical climate.
INIA en tu mesa. Aportes de la investigación agropecuaria a la alimentación saludable.
INTRODUCCIÓN. Los alimentos forman parte de nuestra vida, son parte del quehacer cotidiano. Desde el clásico ?¿qué tenemos para comer??