New DNA Cattle Test Beefs Up Dairy Quality

A genomics technique developed at Cornell to improve corn can now be used to improve the quality of milk and meat, according to research published online May 17 in the journal PLOS ONE.

A team led by Ikhide Imumorin, Cornell assistant professor of animal science, is the first to apply a new, inexpensive yet powerful genomics technique to cattle called genotyping-by-sequencing (GBS). The protocol contains only four basic steps from DNA to data, and Imumorin's work demonstrated it generates enough markers to put cattle genomics on the fast track.

"Breeders are interested in cattle with traits such as high meat or milk quality, disease resistance and heat tolerance, but identifying the best animals means sorting through thousands of unique gene variants in the genome," said Imumorin. "Until recently, the cost of genomics techniques has set too high a bar for breeders, and many cattle species, particularly those outside the United States and Europe found in Africa and Asia, were excluded from the genomics revolution."

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