15.33%. That's the coefficient of relatedness between Frankel and Chrysanthemum, the first mare scanned in foal to the champion racehorse during his first season at stud. As a point of comparison, first cousins are 12.5% related and half siblings are 25% related.
Chrysanthemum, owned by the Coolmore team of Tabor, Magnier, and Smith, won a pair ...