Reference sires is a bull that has previously been progeny tested and subjected to national cattle evaluation that is used concurrently with a test sire or sires in a new progeny program. Reference sires provide genetic linkages among herds and/or existing databases, allowing indirect comparison of the tested sire with bulls evaluated at other places and times.

The use of reference sires serves to tie new information to the existing database so comparative genetic values may be calculated. It is also helpful for clients to visualise traits and characteristics that bull their purchasing is likely to posses.

You can view Sandon Glenoch Angus's reference sires for 2022 here.