Holsteins maintain autumn calving dominance
Tuesday, 7 April 2020
Autumn block calving herds looking ahead will find their most profitable choice of sires by using the Autumn Calving Index (£ACI), an across-breed ranking which is dominated, as usual, by the Holstein breed.
Jointly taking the lead with an ACI of £617 are Hoanster Zanzibar and Westcoast Guarantee, the latter making his debut as a daughter-proven bull.
View-Home Littlerock holds his third position with an ACI of £591 while Seagull-Bay SR Stardust rises to fourth from seventh position (ACI £584).
Long-term headliner, Teemar Shamrock Alphabet (ACI £572) drops from first to fifth place, while continuing to transmit the best daughter fertility and TB resistance in the top five bulls.
Reminding producers that the Spring and Autumn Calving Indexes should only be used in tight block-calving herds, Fern Pearston, animal genetics manager for AHDB Dairy says: “These indexes are expressed across breeds, which makes them a particular help to producers involved in cross-breeding, or those considering a change of breed. However, this means it’s very important not to look at the components of the index and compare them with other Predicted Transmitting Abilities (PTAs) used in the calculation of £PLI, as these are each expressed against that breed’s average and on that particular breed scale.”
See the full of available daughter proven bulls ranked by £ACI
The latest bull rankings for spring block calvers
TABLE 1: TOP 20 BULLS RANKED ON £ACI – APRIL 2020
Rank | £ACI | Breed | Bull name | Supplier GB/NI |
1 | 617 | HOL | HOANSTER ZANZIBAR | SMX |
1 | 617 | HOL | WESTCOAST GUARANTEE | SMX |
3 | 591 | HOL | VIEW-HOME LITTLEROCK | SMX |
4 | 584 | HOL | SEAGULL-BAY SR STARDUST | GEN |
5 | 572 | HOL | TEEMAR SHAMROCK ALPHABET | GEN |
6 | 570 | HOL | PROGENESIS UNICORN | SMX |
7 | 562 | HOL | BOMAZ ALTATOPSHOT | ALT |
8 | 561 | HOL | S-S-I HEADWAY ALLTIME | WWS |
9 | 560 | HOL | BELLEMONT PERKS | CBL |
10 | 559 | HOL | STANTONS MOST WANTED | WWS |
11 | 544 | HOL | ARDS RP ROSCOE | GEN |
12 | 538 | HOL | PINE-TREE VERONA | GEN |
12 | 538 | HOL | S-S-I HOTSHOT SNAZZY | WWS |
14 | 535 | HOL | GLAMOUR BOGHILL CASPER | GEN |
15 | 532 | HOL | BRYCEHOLME SS BOASTFUL | GEN |
16 | 531 | HOL | MR RUBI-AGRONAUT 73287 | CBL |
17 | 525 | HOL | DE-SU 12272 APEX | GEN |
18 | 524 | HOL | LARCREST COMMEND | GEN |
19 | 523 | HOL | MR SEAGULL-BAY MALDEVES | GEN |
20 | 522 | HOL | S-S-I MOGUL MULTIPLY | WWS |
20 | 522 | HOL | S-S-I MODESTY MARQUEE | WWS |
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