Explore how pedigree relationships and genetic diversity shape decisions in sport horse breeding. These articles look at what ancestry can reveal about relatedness and inbreeding, how the repeated use of influential lines affects a population, and why genetic diversity matters when planning future generations. We explain the principles behind reading a pedigree and considering a stallion–mare combination in a broader genetic context.

Genetic information is one part of a breeding decision. It can help breeders ask informed questions about a pairing and the diversity it may contribute, alongside conformation, movement, health, temperament and performance. The aim is to understand both what a combination may bring and what should be preserved, while recognising that a pedigree cannot predict every outcome in an individual foal.