Bomaz Monument-P has already made his debut as a proven sire also takes the top ranking in the Autumn Calving Index (£ACI) highlights sires published by AHDB.

He offers high milk fat, long daughter lifespans and good calf survival, all of which are requirements of any successful dairy enterprise.

Monument-P’s ACI of £661 is 15 points ahead of second placed Progenesis Wimbledon (ACI £646) who is also the leader in this month’s Spring Calving Index (£SCI) ranking.

In third place is the UK-bred Holstein, Boghill Glamour Persuade (ACI £637). With 10 milking daughters contributing to his index, he just qualifies for these daughter-proven rankings on early data.

VH River Ramsey moves up to fourth position, with an ACI of £634, transmitting good udder health in particular. In joint fifth position are ABS Sassafras and VH Bosman Bahrain (ACI £626), Sassafras transmitting the better milk components, while Bahrain is higher for milk volume.

Westcoast Yamaska, who led the rankings previously, is now in seventh position (ACI £616). He now has almost 1200 UK milking daughters confirming his high fat and protein transmission.

A second UK-bred sire, Stowey Magician, now ranks in eighth position (ACI £610) and demonstrates strong daughter fertility ratings. And rounding off the top 10 are Peak AltaKlaebo who climbs to ninth position (ACI £604), and the strong lifespan transmitter, Melarry Frazz Arrowhead, now ranking 10th (ACI £592).

Spring Calving Index (£SCI)

Holstein sire Progenesis Wimbledon takes the lead in the £SCI rankings, thanks to high fat and protein percentage transmission and a significant improvement in his daughter Fertility Index. He now has an SCI of £557 and will shorten his calves’ gestation length – a feature often beneficial to tight block calving herds.

This pushes the previous Jersey frontrunner, VJ Ravninggaard Huus Hamlet (SCI £548) into second position.

Moving up to take third place is another Jersey in the shape of VJ Groenbjerg Lobo Lobster. His SCI of £542 reflects his daughters’ high milk solids and good lifespans.

The Holstein sire, ABS Sassafras gains a few places and now ranks fourth (SCI £539), transmitting a higher milk volume than the three bulls ranking above him.

Danish Jersey VJ Zummit retains his fifth position (SCI £523), while the new Holstein £ACI and £PLI frontrunner, Bomaz Monument-P, makes his appearance in joint sixth position (SCI £522) and is one of the higher production sires in this list. Level-pegging VH Balisto Brixton has the best Lameness Advantage of the top bulls.

Another new entry in eighth place is the UK-bred Holstein, Boghill Glamour Persuade (SCI £519). VH Bosman Bahrain (SCI £515) moves up to ninth and the final new entry in the top 10 is the New Zealand-bred Jersey, Shelby Integ Labyrinth (SCI £513).