Jeff Ziegler
The Never-Ending Quest for Outcross Genetics: How Important is it?
Genetic gains during the genomic era have more than doubled from earlier times, and we now select for a much more complete array of traits including fertility, health and feed...
AI’s Recommend Their Own Favourites These Bulls Should Be Used More Often:
For decades already, sire selection primarily takes place via indexes. The number of bulls that are selected based on word of mouth reports, evaluating daughters, or in other ways, is...
Feet and Legs: It’s Complicated!
Genetic advancement has been impressive, not only for production but for health and type traits too. Udders are now much more uniform across the breed than ever before, and a...
BullTalk - August 2023
Swissgenetics is marketing a polled sire with unique qualities: Vogue Hero-P. ‘He is extremely popular in Switzerland, because he is very all-round,’ tells Marc-Henri Guillaume from Swissgenetics, who points to...
BullTalk - June 2023
‘It all started with the purchase of four Bolton embryos out of the American cow Sandy-Valley Gar Truffle EX-92, a daughter of the icon Ricecrest Terry Tory EX-93. Three heifer...
(Virtually) Faultless Transmitters: Selected for You by Nearly All AI Companies World-wide
What is the value of a top bull with 3200 TPI if he transmits very short teats? What are the options for a sky high RZG sire if the stature...
Jeff Ziegler, Select Sires: ‘Find the Most Profitable Cow and Learn to Like Her.’
‘The science tells us that these old measures of inbreeding need to be updated with modern tools and better education.’ Jeff Ziegler speaks openly about current themes in Holstein breeding...
BPS Panther Foxcatcher Outcross Sire 2022
‘Always a fun exercise and a difficult one as well. Yet we continue to focus on providing altenative bloodlines, that still do not steer our program off the firm objectives...
Due to his False Start: The Important Message of S-S-I Duke for Global Breeding
He is one of the best sires of his generation, but: we did not discover that until later. Because it took until the arrival of his milking daughters before we...
BullTalk - May 2022
‘This will become one of our most influential sires of sons,’ said Jeff Ziegler from Select Sires in the summer of 2021. This statement was confirmed in April. And how!...
Lionel The Most Extreme Milk Transmitter Ever
Bounding to the top of the TPI charts with the April proof release was the Frazzled son Lionel, with an amazing TPI of 3172. And at +3397lb of milk, he’s...
Intriguing Sires DNA 2022 - February 2022
As one of the few families with worldwide fame, the Barbie family is one of a select group that continually generate attention on Germany’s breeding scene, although it is seldom...