Episode notes
Four millionaire sires from one cow. That's the Comestar Laurie Sheik record — and the reason a genomic number still can't outrank a proven maternal line.
The Bullvine Podcast traces the maternal dynasties that built the modern Holstein breed and asks the question most breeders won't: does a legendary cow family still beat a genomic index? From Laurie Sheik's four millionaire sons to Glenridge Citation Roxy EX-97 and Regancrest-PR Barbie, the pattern holds — the best families keep compounding value long after the index that ranked their contemporaries is forgotten.
What You'll Learn
- How one cow, Laurie Sheik, produced four millionaire sires — and why that's never been matched
- Why a proven maternal line still outperforms a single genomic score
- What Glenridge Citation Roxy EX-97 proves about longevity and lasting value
- How Regancrest-PR Barbie won inside the genomic system, not against it
- Where real, durable genetic value actually comes from in a breeding program
Genomics promised to replace pedigree with a number. The dynasty cows say otherwise. Laurie Sheik's descendants reached 43 countries and over a million doses of semen — value that stacked across generations, not one flashy proof. For any breeder deciding which heifers deserve a stall, the lesson is direct: the depth of the cow family behind an animal still drives the return.
Full article and sources: https://www.thebullvine.com/genetics-breeding/cow-family-breeding-embryo-math/ Subscribe for straight-talking dairy analysis. Share this with a producer who needs it.