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Gippsland - How Now Gippy Cow
February 2011 Edition

A Genomics Refresher

Genomics provides an opportunity to identify better bulls and increase the rate of genetic gain. Genomics is a new technology which uses DNA data to assist in the calculation of ABVs for cows and bulls.

Genomics is the next step in the evolution of breeding. It continues the long line of developments which include the introduction of classification schemes in the ‘40’s, calculation of breeding values in the ‘80’s and introduction of new management traits in the ‘90’s.

Researchers have utilised the ADHIS database to identify differences in DNA (gene markers) that are linked to genes affecting traits of interest. By testing for the presence of these gene markers, the genetic merit (ABVs) of an animal can be estimated.

Over time, the expected benefits of genomic selection come from:

• Improved selection of young bulls to progeny test by AB Companies
• Bull breeders mating young bulls to young cows to produce the next generation of bulls for progeny testing by AB Companies
• Breeders using teams of young bulls identified as superior through genomic selection