Contribution of Reproduction Management and Technologies to Genetic Progress in Horse Breeding.

This research article discusses the various impacts of reproductive management techniques on horse breeding, particularly how these methods can aid in genetic progress. The researchers used mathematical modeling to show how different breeding conditions affect the theoretical genetic progress.

Objective of the research

The study attempted to determine how various horse breeding and management techniques contribute to genetic progress in horses. This is challenging due to the multiple factors involved, such as the number of offspring produced by a mare or stallion, the ages at which different selection methods become applicable, and the varied accuracy in estimating the breeding value.

Methodology

The researchers developed a mathematical model to assess the theoretical genetic progress in various horse breeding conditions. This model was applied across breeding systems that ranged from producing 0.6 to 2 foals per year per mare, and 10 to 150 foals per year per stallion.

Findings

• The findings demonstrated that when selecting the best animals strictly by truncation (a type of selection that cuts off a portion of the population), genetic progress can actually be accelerated by utilizing several strategies. These include increasing the number of offspring per year, starting reproduction at the age of 2 for both genders, and reducing the amount of time a stallion is used for breeding from 10 to 5 years.
• The researchers’ calculations showed that employing all strategies of improvement could potentially increase genetic progress by up to 270% in mares and 226% in stallions, compared to the standard reference situation.

Case Study: Selle Français Breed

• Using the Selle Français breed as an example, the research indicated that the observed reproductive management parameters were close to the worst conditions of the developed model. This is due to the breed’s 10-year generation interval, 10 foals per stallion, and 0.55 foals per mare.
• It was also observed that the best of the mares in this breed were not being selected for breeding.

Conclusion

The article concludes that new reproductive technologies, genomic selection, and breeding at a younger age can all contribute to an increase in genetic gain, which ultimately benefits the progression of horse breeding. This study emphasizes the importance of effective breeding strategies in maximizing genetic progress in horses.