Holstein cattle at the UC Davis Dairy Facility. Chromosomes from a legendary bull born in 1962 account for almost 14 percent of the genome in the current Holstein population in the United States. A ...

More than 99 percent of Holstein bulls born using artificial insemination in the last decade trace their male lineage to just two bulls born in the 1960s. Efforts to reconstitute two lost male ...

HOLSTEIN sons of Val-Bisson Doorman, proved the star attraction at the Spring Dairy Bull show and sale at Carlisle, last week, siring the three highest priced lots and five of the top 10. Dearest at ...

The drive to make more milk has had an unsavory side effect: Cows have become more genetically similar and less fertile. Scientists are trying to... Most U.S. Dairy Cows Are Descended From Just 2 ...

Cull cow marketing is rarely an all-or-nothing decision. The nuances of each operation should be discussed when deciding to ...

Chad Dechow, a geneticist at Penn State University who studies dairy cows, is explaining how all of America's cows ended up so similar to each other. He brings up a website on his computer. "This is ...