The Heritage Angus Genetic Resource Registry is a registry for registered Australian Heritage Angus stock that have been bred with a number of lines of heirloom Angus genetics that the association has identified and researched to verify their purity.

There are 3 main sources for these genetics. Cattle from the Trangie and Glen Innes Field Trials (Lowline), the Native Bred Angus from Scotland, and other registered Angus cattle that have been proven to be free of any American genetics since 1968.

In 1929 Trangie Research Centre imported top Angus genetics from around the world for their trials and then in 1964 they closed the herd. The Native bred cattle are Scottish Angus that are directly descended from the original Angus cattle in Scotland. The third source of genetics is from Angus cattle identified from a closed herd, or cattle that can prove that they do not contain any American breeding since 1968.

These 3 lines of cattle are included in the Heritage Angus Genetic Resource register. These animals cannot be shown themselves, but can be used when bred with registered Australian Heritage Angus, to produce Australian Heritage Angus cattle that are eligible for showing.
The date of 1968 has been chosen as the cut-off for the use of American Angus genetics, because that was the date that artificial insemination was permitted by the Angus association as a method of breeding. Genetics were easily transported around the world and the integrity of some breeding programs could not be quantified.

The Heritage Angus Genetic Resource Registry was implemented as a means of widening the genetic pool available for breeding Australian Heritage Angus cattle and to preserve the genetics of Heritage Angus cattle.