All change for Holstein bull proofs

A shift in genetics company’s selection criteria is being credited as being behind the domination of this week’s Holstein bull proof run by bulls featuring strong fitness traits.

Heading up the top 10 list is perenial leader O-Bee Manfred Justice with a phenomenal PLI of £285 and an SCC figure of -22. Alongisde this his daughters average +0.6 for lifespan and show strong improvements in fertility with a fertility index of +3.1, explains DairyCo breeding+ geneticist Marco Winters.

“This bull typifies the modern Holstein type profile demanded by commercial dariy farmers. They want cows capable of carrying condition with solid type improvement.”

In second place, and with a PLI up 23 points to £228 is Braedale Goldwyn. With a type merit score of +3.5, he is also the highest type sire in the top 10, explains Mr Winters.

O-Bee Manfred Justice’s domination of the rankings continues in third with the first of his four sons in the top 10, Moningview Legend. He has a PLI of £222 and an SCC score of -16 alongside a milk fifgure of +554. In fourth comes high fat producer Wizard, while top-ranked lifespan improver Laudan is in fifth transmitting nearly a full lactation more than the average bull.

Another O-Bee Manfred Justice son scoops sixth place in the shape of Macomber O-Man Bogart. Ranked among the best daughter fertility improvers at +4.3, he carries a PLI of +208. A half brother, Lot-O-Rok Oman Jake is in seventh with significant improvements on fitness traits as well as production, his PLI is £202.

In eighth is Rudolph son Ramos, despite having been available for some years, this is the first time he’s made the top 10 with his daughters performing particularly well for fertility under UK conditions, with a fertility index of +8.6, the highest in the top 50.

Ninth spot is shared by two sires, the first of which is Wa-Del Hayden, who retains his spot in the top 10 with a PLI of £197 and a milk figure of +689kg alongside a fertility score of +2. And equal ninth is the fourth and final O-Bee Manfred Justice son, Tomlu Oman Dotson. With a highly impressive milk proof of +1129 and a good SCC score of -6, Dotson is a strong contender for farmers on liquid contracts, adds Mr Winters.