Genes Under the Microscope, Horses Under the Saddle: What's New in Breeding and Training
Autumn 2026 brings new genetic obligations for breeders of noble horse breeds, along with fresh evidence for researchers debating how to train young horses without harming their psychological well-being. Here's what's changing - and why it's worth talking about now.
01 · Genetics and Breeding
WFFS Testing Becomes Part of the Stud Book
The Ministry of Agriculture has approved changes to the breeding programs for noble horse breeds, including the Polish and Wielkopolski breeds, which will take effect on October 1, 2026. [1] The most widely discussed change is the requirement to test stallions registered after 2028 for the PLOD1 gene mutation responsible for Warmblood Fragile Foal Syndrome (WFFS) - a condition that can be fatal in homozygous foals. In addition, the main mare studbook will be split into two linear assessment categories, and the changes will also introduce new foal registration rules and a broader range of veterinary tests to rule out disease.
This is a sign that Polish breeding of noble horse breeds is moving toward practices already well established in sport horse breeding abroad, where WFFS carrier testing has been standard for years and test results directly influence breeding decisions. For breeders, this means concrete organizational preparation is needed - it's worth talking to veterinarians now about the logistics of sample collection and testing timelines, and budgeting for the genetic testing of stallions set to enter breeding programs after 2028. Splitting the mare studbook into two linear assessment categories is, in turn, a change that could affect how mares are presented and compared during breeding inspections - a topic that will surely resurface in industry discussions before the regulations take effect.
02 · Welfare and Training
Young Thoroughbreds Respond to Training Differently Than Expected
On a completely different note, but equally relevant to everyday stable practice, is a study published in Frontiers in Veterinary Science. [2] Researchers examined how a 12-week preparatory training program affects the behavior of young Thoroughbred horses. The results are surprising: horses that underwent training showed noticeably more locomotor activity - trotting and galloping for longer, and even bucking more often - and, counterintuitively, were more willing to explore new objects with their muzzles, even though they approached those objects less often.
Above all, the authors highlight the considerable individual variability in how horses respond to training, and propose assessing the welfare of young horses in training in a multidimensional way - taking several types of behavior into account at once rather than relying on a single behavioral indicator. This is an important contribution to the debate among both trainers of young racehorses and sport horse breeders who are weighing how early and how intensively to begin work under saddle or in a training headcollar, so that increased locomotor or exploratory activity isn't mistaken for a decline in welfare - or, conversely, so that subtle signs of stress don't go unnoticed.
Both topics, though seemingly unrelated - breeding genetics and the psychology of training young horses - share one thing in common: the growing precision with which the equine industry approaches horse welfare, from the molecular level all the way to everyday work in the stable and on the paddock.
Summary
Summary
New genetic requirements in breeding programs and fresh data on the behavior of young horses in training are exactly the kind of topics worth discussing face to face with breeders, veterinarians, and trainers. Join us at Horse Pro Forum - Targi Dobrostanu Koni i Wyposażenia Stajni, where you'll find space for these conversations as well as practical solutions for stables and breeding operations.
Invitation
New genetic tests in breeding and research on the welfare of young horses in training are topics best discussed with experts in person. Visit Horse Pro Forum - Targi Dobrostanu Koni i Wyposażenia Stajni and talk with breeders, veterinarians, and trainers about how to put these changes into practice. Discover the latest solutions and equipment supporting the health and welfare of horses in your stable.
Horse Pro Forum 2026Footnotes
[1] Polski Związek Hodowców Koni (pzhk.pl) — https://www.pzhk.pl/2026/09/uwaga-zmiany-w-programach-hodowlanych-koni-ras-szlachetnych/[2] Frontiers in Veterinary Science — https://www.frontiersin.org/journals/veterinary-science/articles/10.3389/fvets.2026.1927282/full