Genetic Base Change 2014

Published 10 September 15

Every five years, the national genetic average for every trait is recalculated and reset to zero to account for the genetic progress made. In August 2014 the base was reset, and that’s why you’ll occasionally see PTAs referred to as PTA2014. However, for simplicity’s sake the suffix is generally dropped despite the fact that every PTA calculated in the ensuing five years will technically be a PTA2014.


Whenever there is a base change, there will be a noticeable change in PTA values across the board, although the base change itself causes no change in ranking