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Timely Topic
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Economic Impact of Using High Accuracy Genetics in an AI Program
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The study involved a total of 328 steers from four sire groups that were categorized based on their expected progeny difference (EPD) accuracies: 1) High Accuracy AI (HA); 2) Low Accuracy AI (LA); 3) Calving Ease AI (CE); or 4) Natural Service (NS). HA sires were bulls with EPD accuracies ≥ .85 for birth wt. (BW), weaning wt. (WW), and yearling wt. (YW). All sire groups were harvested at the same yield grade, based on ultrasound measurements.
Steers sired by HA sires finished at a significantly younger age (P<0.0001) than other sire groups (HA, 408 days; LA, 430 days; CE, 443 days; NS, 416 days) with greater average quality grades (HA, Hi Choice; LA, Lo Choice; CE, Avg. Choice; NS, Lo Choice). HA-sired steers also finished with significantly greater (P<0.0001) net return compared to other sire groups (LA, +$50.69; CE, +$53.83; and NS, +$89.66). Estimated lifetime value of HA-sired replacement females compared to NS-sired replacement females ranged from $248.43 (4-yr. productive life) to $416.40 (7-yr. productive life). The authors concluded that AI to sires with high accuracy EPDs provides the opportunity to increase the profitability and marketability of both terminal and replacement female calf crops (Schafer et al. 2007. J. Anim. Sci. 85 (Suppl. 1). Abstract T43).
[June 18th, 2008]
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Dr. Rick Rasby, Professor of Animal Science
Animal Science, University of Nebraska - Lincoln, Lincoln, NE
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