Each year, the genetic base used to express genetic evaluations in Canada is updated in conjunction with the first official release. The definition of each genetic base used is therefore as follows:
The table below indicates the amount of base change realized in 2015 compared to 2014 for each trait and breed. For LPI, the following base adjustments reflect the change to the new scale with half the variance compared to previous years.
1 – Base change for LPI is set to zero since it is already reflected by the change in the “Constant” included in the LPI formula. 2 – Traits expressed on scale of Relative Breeding Values (RBV). 3 – For Somatic Cell Score only, negative base change values represent a desirable trend in genetic progress.
