Sterk Jort Red (Jakarta x Aikman x Man-O-Man) is the impressive result of optimally utilising the available variety in breeding. Black-and-white genetics are increasingly being used to take the red-and-white population to the next level. In Jort's case, it is not about just any black-and-white cow family, but the family of the American cow Prudence (EX 95). The success of this line is also demonstrated by another closely related branch.

Jort’s sire Jakarta, with Rosebud as his sire and Potter P as his dam's sire, boasts a pedigree that contains two very good, proven breeding bulls that offer an out of the ordinary bloodline. Jakarta is a calving ease bull who transmits high milk production and positive protein percentages. In terms of conformation, he passes on average development, good legs and correct udders, while the health traits can all be characterised as good.

Jort’s maternal line originates in the USA, where the impressive Prudence (EX 95) is the best known name in the family. Via a 90-point Rudolph daughter and an 88-point Durham daughter, Prudence is the great grand dam of the Dutch Mascol Pam (VG 87). Pam can be found in the third generation of Jort's pedigree. Through her daughter Manoa, the grand dam of Jort, we arrive at Jort's dam, Vekis Prudence. She is a particularly strong cow with lifetime production of more than 60,000 kg milk (with very high components). Her full sister Doreen, via the 89-point Rubicon daughter Rose, is the grand dam of one of the most successful red-and-white cows at the moment: Salvatore daughter Red Range (VG 86)