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Genetic marker sought for feed efficiency in cattle

 

Article by Feedstuffs

Researchers with the University of Arkansas System Division of Agriculture are working to identify genetic markers that can help cattle producers find the best bang for their buck when choosing breeds and budgeting for feed.

Kelly Bryant, director of the Division of Agriculture’s Southeast Research & Extension Center (SEREC), and several members of his research team and staff from Beefmaster Breeders United are monitoring offspring from the SEREC herd of Beefmaster heritage lines in an effort to determine if feed conversion efficiency is an inheritable trait.

University of Arkansas Division of Agriculture researchers at the Southeast Research & Extension Center are studying 31 Beefmaster heifers for the next three to five years, hoping to identify genetic markers for high feed conversion efficiency.

“From the time they’re weaned until the time they’re either ready for slaughter or ready to deliver a calf, they’re in a growth stage,” Bryant said. “It’s all done through either grass or grain. Some can just gain more weight on less feed than others. It makes it cheaper. Gain is what we’re after, and if we can do it on less feed, then we’ve got less money in them.”

If specific genetic markers tied to that higher efficiency can be identified and isolated and are found to be inheritable, growers could potentially improve the conversion efficiency of entire herds over time by introducing Beefmaster genetics into their breeding operations.

On Aug. 5, Bryant and his research staff took possession of 31 heifers that had spent the previous 60 days at a Grow Safe facility in Texas.

“The Grow Safe systems track animal feed intake and weight gain, allowing us to measure feed conversion efficiency for each animal,” Bryant said. “With this information, we hope to determine if feed efficiency is inheritable.”

Bryant said the research project, which is expected to last at least three to five years, is being funded, in part, by Beefmaster Breeders United, a trade association of cattle producers who both maintain purebred Beefmaster cows and use the cattle for commercial crossbreeding.

Bryant said cows in the herd maintained at SEREC typically calve in September or October. Females are typically bred no earlier than 15 months of age, calve when they are about two years old and generally calve once a year after that.

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