[Population genetic analysis of the heritability of gutteral pouch tympany in Arabian purebred foals].

This study aims to analyze the influence of sex, inbreeding coefficient, and additive genetic contribution on the occurrence of guttural pouch tympany in Arabian foals, with results indicating a significant genetic component.

Research Objective

• The study aimed to explore the significance of three variables: sex, an inbreeding coefficient, and the additive genetic contribution in relation to the prevalence of guttural pouch tympany, a condition that affects the upper respiratory tract, in Arabian purebred foals.

Data Collection

• Data for the study was collected from the Clinic for Horses, School of Veterinary Medicine Hannover.
• The sample consisted of 27 Arabian purebred foals affected by guttural pouch tympany, 22 of which were patients at the clinic from 1994 to 2001, while 5 were sampled from studs.
• Pedigree information of these patients was recorded, enabling the researchers to categorise the affected foals into four distinct families comprising a total of 276 animals.

Results

• Results demonstrated that female foals were more likely to be affected by guttural pouch tympany with a 11.9% differential.
• The study found that the size of the inbreeding coefficient was not significant in terms of the occurrence of guttural pouch tympany.
• The heritability of guttural pouch tympany was determined using a threshold model, which produced an estimate of 0.49 +/- 0.28.
• This research pointed towards a notable genetic component in the prevalence of guttural pouch tympany in foals – the first such finding in this topic.