Assignment of foal paternity when a mare is bred to two stallions.

This research looked at the accuracy of assigning foal paternity to the second stallion a mare is bred with, when breeding took place within 1 to 45 days. The findings based on 108 equine paternity cases suggest that breeding dates alone are not a reliable way to accurately establish equine paternity.

Experiment Design and Data Collection

• The research involved investigating equine paternity cases in order to assess the precision of assigning foal paternity to the second serving stallion.
• The cases considered for the research involved mares that had been bred with two different stallions within a time interval ranging from 1 to 45 days.
• Essential data was derived from the breeding dates recorded from 108 equine paternity cases.
• The study scrutinized these cases, all of them previously resolved using blood typing to determine accurate paternity.

Research Findings

• Out of the 108 cases analyzed, it was found that 102 of the foals were sired by the second stallion the mares were bred with.
• However, six foals, which corresponds to 5.5% of the total cases, were excluded from being the progeny of the second sires.
• This result signifies that the reliability of utilizing breeding dates solely as an information source to assign accurate equine paternity is debatable.
• With a 5.5% probability of error, it becomes evident that relying solely on breeding dates could lead to inaccurate conclusions.

Implications of the Study

• The results of this study suggest that relying solely on breeding dates to assign foal paternity can lead to a certain level of inaccuracy.
• This conclusion is particularly significant in the equine industry, where precise determination of paternity is crucial for establishing pedigrees, valuing horses, and making breeding decisions.
• The findings underline the importance of other methods, such as blood typing, which were used to conclusively solve the paternity cases involved in this study.