Episode 319 - Inbreeding: Is It An Impending Doom? - UMN Extension's The Moos Room

Abstract

In this episode, Brad is back from Europe—jetlagged but full of insights from farms and conferences in Germany and the Netherlands. He dives into one of the biggest topics he heard about abroad and at home: Inbreeding in dairy cattle. Brad explains how inbreeding occurs, what it costs farmers economically, and how inbreeding levels have climbed across all major dairy breeds—especially Holsteins and Jerseys. Drawing on recent research from Italy and data from the U.S. Council on Dairy Cattle Breeding, he outlines how increasing inbreeding negatively impacts cow survival, fertility, and long-term profitability. The discussion highlights startling trends—Holstein inbreeding has jumped from 3.7% in the mid-1990s to nearly 11% today, and some genomic bulls now exceed 16%. Brad also touches on historic bulls whose genetics still dominate today’s herds, like Elevation and Highland Magic Duncan, and explores whether approaches like crossbreeding, linebreeding, or greater genetic diversity in breeding programs could help slow the trend. Brad concludes with a call to action: farmers, AI companies, and breed associations must prioritize genetic diversity now to safeguard herd health and productivity.