DairyTalk 742: Maximum Scores or Functional Optimum? Why RZE-K Favors a Different Kind of Holstein - by Helmut Demmelhuber

DairyTalk by Helmut Demmelhuber · Oct 29, 2026 · 18m

This podcast episode is based on a technical analysis introducing RZE-K, an alternative conformation index designed to adapt the American HCC approach to German Holstein breeding. Rather than rewarding increasingly extreme physical characteristics, the proposed index defines functional target ranges and applies penalties when traits move too far from their biological and economic optimum. An evaluation involving more than 3,000 bulls and data from partner herds examines how this approach changes the relative importance of udder traits, feet and legs, and body size. According to the analysis…