ArticleTranslational animal science2025
Application of DNA parentage testing and EnVigour HX™ to evaluate bull prolificacy and heifer performance in beef cattle breeding programs in Western Canada.
Article in Translational animal science, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
The use of multi-sire breeding pastures is a common practice in Western Canada for beef cattle management. However, the number of progenies sired by each bull may not be known or producers will not be sure if performance traits were passed on. Hybrid vigor is defined as the superiority of crossbred progeny over their parents' average to increase production efficiency, longevity and reproductive rate of beef cows. A DNA parentage test was performed to identify relative sires to their progeny. Then, 109 bull prolificacy indexes (BPI) were calculated for 46 sires over 6 breeding seasons (some had more than one BPI). They ranged from 0.04 to 3.47, with values larger than one showing high prolific sires. Yearling sires had a significantly lower BPI value than 2-year-old and mature bulls. Regardless of the level of BPI, each sire produced the majority of all his born calves in the first cycle of the calving period (R
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