Woodleigh cattle have been selected on performance for the past 30 years. The breeding objective is to maximise growth and carcass performance up to 22 months of age. Myostatin gene modifications from pure bred Belgian Blues in both Belgium and the UK have been introduced into NZ bred cattle with an Angus/Friesian background. As a result 400 day liveweights of Woodleigh yearlings have increased by over 30% - the kind of productivity improvement much needed in the NZ beef industry.