Publications by authors named "Carl Fredrik Ihler"
Background: There are no reports on the number of fatalities or causes of death in the Norwegian and Swedish harness racehorses.
Objectives: The incidence rates (IRs), risk factors, and postmortem findings in horses that died or were euthanized associated with racing between 2014 and 2019 were investigated.
Animals: Thirty-eight Standardbreds and 10 Norwegian-Swedish Coldblooded Trotters died or were euthanized associated with racing.
Article Synopsis
- The Norwegian-Swedish Coldblooded trotter (NSCT) has been selectively bred for harness racing since the 1950s, leading to significantly improved performance but also increased inbreeding levels.
- Recent advancements in genomics have prompted the NSCT industry to explore molecular approaches for managing inbreeding, shifting from traditional pedigree analysis to genomic-based assessments of inbreeding coefficients.
- A study analyzing 566 raced NSCT individuals revealed that genomic inbreeding coefficients were consistently higher than those based on pedigree, indicating a continued rise in inbreeding from 2000 to 2009, and highlighting the need for breeding programs that can better manage genetic diversity.
Article Synopsis
- Horses have been bred for speed, strength, and endurance, resulting in different specialized breeds that have similar traits but also unique differences.
- A study looked at horse genes from three Nordic horse groups to find specific areas in their DNA related to how well they can trot and race.
- The research found many gene regions related to racing ability, with some genes connected to intelligence and muscle development, but only one of those areas matched previously known factors affecting racing success.
Article Synopsis
- - The study investigates the genetic factors contributing to harness racing success in Norwegian-Swedish Coldblooded Trotters using a large genomic dataset.
- - Researchers found nine significant genetic markers linked to career earnings, while only suggestive markers were identified for other performance traits like gallops and best km time.
- - The findings suggest that not only physical traits but also cognitive abilities, such as learning and memory, play a crucial role in a horse's racing success.
The Swedish-Norwegian Coldblooded trotter (CBT) is a local breed in Sweden and Norway mainly used for harness racing. Previous studies have shown that a mutation from cytosine (C) to adenine (A) in the doublesex and mab-3 related transcription factor 3 (DMRT3) gene has a major impact on harness racing performance of different breeds. An association of the DMRT3 mutation with early career performance has also been suggested.
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