April’s proof run sees NSW’s Illawambra Holsteins, Trevor & Leah Parrish, with the top ranked new genomic female, Illawambra Lawson Dallas 3914 (397BPI). Illawambra Lawson Dallas 3914 also featured in second spot on the top young genomic females (born after 30-11-2017) and at number five on the overall list of top genomic females.
Vala Holsteins featured strongly on the new genomic females list with Vala Aroldis Nady-ET (358BPI) and Vala Jeronimo Rozie-ET (352BPI) two of six animals from this Victorian breeder in the top twenty.
The new genomic females list saw six breeders represented with a wide variety of cow families, sires and different breeding philosophies. Over the next week Holstein Australia will be catching up with a number of these breeders for a more in depth analysis of the April run.
The male side of the April run also saw eight bulls over 400BPI with two Australian bred bulls to the fore - Vala Bandares Shaydon-ET (420BPI) and Carenda Sondalo (402BPI). Wilara Josuper Jo-ET (341BPI) topped the Australian Proven Bulls list on BPI and was also the highest production bull.
Holstein Australia CEO, Graeme Gillan, says: “It is a testament to these breeders, who have utilised some of the best genetics from Australia and around the world, that Australian bred bulls are starting to feature prominently in the Good Bulls Guide.”
This month also saw the introduction of eight new or updated health and type traits – here are some of the key changes.
Breeders can now select to directly improve the mastitis resistance of their next generation with this new ABV drawing on three sets of information to directly target mastitis. These include: 305-day somatic cell count, udder depth and clinical mastitis records. The Cell Count ABV will continue to be published as it is a useful tool to breed cows that contribute to a lower bulk milk cell count. Find out more.
The new Gestation Length ABV provides a breeding tool to manage late calving cows. It identifies bulls and cows whose calves are born earlier than their expected due date. Cows that calve earlier are in-milk for more days before re-joining and have longer to recover post-calving. Find out more.
The updated Calving Ease ABV now includes genomics which means that most Holstein bulls, including young genomic bulls, receive a Calving Ease ABV. Find out more.
The new type traits – Dairy Strength, Feet & Legs and Rump - and updated Overall Type and Mammary System have been introduced to provide additional and more focused breeding tools. Find out more.
Holstein Australia’s Gentetics Services Manager, Rohan Butler, says: “The improved Overall Type and Mammary have been designed to better represent the Holstein Australia Classification system. Whilst also improving the accuracy and spread of the ABVs this will help breeders better identify which animals are superior for type.
“The inclusion of breeding values for the composites Feet and Legs, Dairy Strength and Rump, will also help in this space as breeders can use these traits to help focus on a whole composite rather than trying to work just from the linear traits,” says Rohan.
Head to the DataGene website for technical information and a summary of all the updates.
Ivyhurst Wrangler Mystery 6194 (436BPI) remains at number one on the top genomic females list (436BPI) with a new cow, Coomboona Duke Bolade (431BPI) at number two, pushing Vala Bandares Boliana-ET (422BPI) – her daughter – down to number three.