A genome wide-association study for production traits in cattle was carried out using genotype data from the 10K Affymetrix (Santa Clara, CA) and the 50K Illumina (San Diego, CA) SNP chips. The results for residual feed intake (RFI), BW, and hip height in 3 beef breed types (Bos indicus, Bos taurus, and B. indicus × B. taurus), and for stature in dairy cattle, are presented. The aims were to di...

Mitogen-activated protein kinase kinase kinase 5 (MAP3K5) is essential for apoptosis, proliferation, differentiation, and immune responses, and is a candidate marker for residual feed intake (RFI) in pig. We cloned the full-length cDNA sequence of porcine MAP3K5 by rapid-amplification of cDNA ends. The 5451-bp gene contains a 5'-untranslated region (UTR) (718 bp), a coding region (3738 bp), and...

Abstract United States seedstock sheep producers have selected for higher weaning and post-weaning weights using estimated breeding values approximately forty years. Despite this, little work has investigated if the increased performance inadvertently resulted in feed intakes, increasing total costs producer. Eighty range-breed ewe lambs (forty Targhee Rambouillet) were enrolled a residual inta...

The objectives of this study were to determine the extent to which selection for decreased residual feed intake (RFI) affects pork composition and quality. Pigs from the fifth generation of selection for decreased RFI (select) and a randomly selected line (control) were utilized. Two experiments were conducted. In Exp. 1, barrows (22.6 ± 3.9 kg) from select and control lines were paired based o...

This study’s objective was to determine the impact of a dual respiratory and enteric bacterial health challenge on antioxidant protein peroxiredoxin-2 (Prdx-2) profile oxidation in skeletal muscle pigs from 2 lines that were divergently selected for residual feed intake (RFI). The hypotheses (1) differences exist Prdx-2 between RFI infection status (2) less efficient high-RFI health-challenged ...

Due to the amount of time and effort required in measurement, often only a limited number of animals are assessed for individual feed effi­ ciency traits, and this can lower the amount of genetic progress made. Measuring the surface temperatures of the unfeathered areas of turkeys has been proposed as a method to monitor the proportion of feed energy ingested and metabolized. Theoretically, a l...

The aim was to estimate the genetic correlations between residual feed intake (RFI) and dry matter (DMI) with carcass finish (CF), rib eye area (REA), marbling (MAR) of Nellore cattle. Data from 7,808 animals were considered. In addition, data 2,261 females included in complete database also Estimates variance covariance components, as well heritabilities obtained by means two-character analysi...

The objectives of this study were to determine the fraction of additive genetic variance explained by the SNP from the Illumina Bovine3K chip; to compare the ranking of animals evaluated with genomic-polygenic, genomic, and polygenic models; and to assess trends in predicted values from these 3 models for residual feed intake (RFI), daily feed intake (DFI), feed conversion ratio (FCR), and post...

The objectives of this study were to determine the fraction of additive genetic variance explained by the SNP from the Illumina Bovine3K chip; to compare the ranking of animals evaluated with genomic-polygenic, genomic, and polygenic models; and to assess trends in predicted values from these 3 models for residual feed intake (RFI), daily feed intake (DFI), feed conversion ratio (FCR), and post...

Data from 2 previously published experiments, New South Wales (NSW; n = 161) and Western Australia (WA; n = 135), were used to test molecular value predictions (MVP), generated from commercially available gene markers, on economically important traits of Bos indicus (Brahman) cattle. Favorable tenderness MVP scores were associated with reduced shear force values of strip loin (LM) steaks aged 7...