Selection is a basic tool used for genetic improvement of livestock. It is very effective if made based on breeding values. This page gives access to various information about animals from the populuation of Polish Holstein-Friesian cattle, including their breeding values.
Rankings of the best bulls based on IE index, and alternatively PF index, also a bull search
Rankings of top females
Rankings of the best heifers based on the rIE pedigree index and, alternatively rPF index
Rankings of top herds based on heifer’s rIE pedigree index and, alternatively rPF index