Hereford and Red Angus Heifers Recruited for Genomics Research
The University of Missouri is recruiting 2,500 Hereford heifers and 2,500 Red Angus heifers to participate in a heifer puberty and fertility genomic research project. Heifers should be registered Hereford, registered Red Angus, or commercial Hereford or Red Angus. Hereford x Red Angus crossbred heifers targeted for the Premium Red Baldy Program would also be a good fit for the research project. Producers must be willing to work with a trained veterinarian to collect the following data: ReproductiveTract Scores collected at a pre-breeding exam 30 to 45 days prior to the start of the breeding season. PelvicMeasurements (height and width) collected at the same pre-breeding exam 30 to 45 days prior to the start of the breeding season. Pregnancy Determination Using Ultrasound reporting fetal age in days. Ultrasound will need to occur no later than 90 days after the start of the breeding season. In addition, heifers must have known birth dates and have weights recorded eithe
Comments
how and why did any re-sortings or rankings occur?
Genomic-enhanced EPDs (and all EPDs in general) are predictions based on random effects. Random effects always have a certain degree of uncertainty, and with EPDs we express this uncertainty as an EPD accuracy. When we add additional data to random effects the predictions change. When genomic predictions are re-estimated the random effects change. This is especially significant for families within the breed have not been previously sampled. When these families are sampled the predictions for animals within these lineages change. This is the major source of re-ranking in recalibration.