Episode 331 - Why I Use the Bulls I Do: Fertility, Polled Genetics, and Outcross Thinking - UMN Extension's The Moos Room

The Moos Room

Hosted by members of the University of Minnesota Extension Beef and Dairy Teams, The Moos Room discusses relevant topics to help beef and dairy producers be more successful.

Brad checks in from a brutally cold stretch in western Minnesota (30–40°F below zero), noting the cows are handling it well and somatic cell counts tend to run low in the extreme cold. He then walks listeners through how he thinks about sire selection in his research herd—mostly Holsteins, plus Jerseys and a few “colored breeds” like Norwegian Red, Montbéliarde, and Normande. His selection philosophy is clear: he starts with Net Merit, but he doesn’t blindly follow it. Brad says he doesn’t chase milk pounds, and he wishes the major indexes put more emphasis on fertility. Instead, his priorities are: Low somatic cell count / mastitis resistance High fertility (DPR, heifer and cow conception rate) Productive life and durability Managing inbreeding (using outcross sires when needed) A major current push: polled genetics (especially homozygous polled sires to speed progress) Brad shares many of the specific bulls he’s using and why—including proven sires with lots of daughters for reliability, plus a smaller “sprinkling” of genomic bulls (often because they’re polled). He highlights using popular Holstein sires like Genosource Captain, polled-focused options like Leyser PP and Seabrook PP, plus a few high-type outcross bulls mainly to reduce inbreeding, even if their production or functional traits aren’t his usual preference. He also lists several Select Sires bulls (including polled sires) that fit his functional-trait focus. On the Jersey side, he emphasizes moderate cows with fertility, productive life, and livability, again weaving in polled where possible. For crossbreeding, he calls out Norwegian Red bulls with strong U.S. proofs for fertility and functional traits, and he mentions finding limited polled options in Montbéliarde but using them when available. He wraps by summarizing what listeners should take away: his herd is moving deliberately toward polled, backed by a USDA grant, while still prioritizing fertility, longevity, mastitis resistance, and outcrossing to manage inbreeding—and he invites feedback and debate from listeners. Questions, comments, scathing rebuttals? -> themoosroom@umn.edu or call 612-624-3610 and leave us a message! Linkedin -> The Moos Room Twitter -> @UMNmoosroom and @UMNFarmSafety Facebook -> @UMNDairy YouTube -> UMN Beef and Dairy and UMN Farm Safety and Health Instagram -> @UMNWCROCDairy Extension Website AgriAmerica Podcast Directory