Inbreeding and linebreeding in the show jumper: what to know

Reading pedigrees, you sometimes find the same ancestor more than once: it is the sign of inbreeding or linebreeding. Let's see what they mean.

The definitions

Inbreeding is when the same ancestor appears more than once in a pedigree. Linebreeding is a milder form: the common ancestor is further back (beyond the third generation) and the aim is to concentrate the genes of a highly influential individual [1][2].

What it is for

Concentrating a line (for example towards a founder such as Cor de la Bryère) can increase the chance of passing on desirable jumping qualities [1][2].

The risks

Too-close inbreeding carries risks: so-called «inbreeding depression» can reduce fertility, vigour and soundness and bring out harmful recessive genes [2]. This is why breeders seek a balance.

Learn more

See how to read a pedigree and the importance of the dam line.