A horned bull from a control group is flanked by two hornless offspring of a genome-edited bull. (Credit: Alison Van Eenennaam)

In promising news for dairy farmers, researchers have bred what are likely the first offspring from a genome-edited bull. The calves were born without horns, a trait that occurs naturally in cattle but was given to their father via previous DNA-editing research.

The offspring were otherwise normal and healthy, the authors report Monday in Nature Biotechnology. I