News of the week from chemical and engineering news tell us about RNA interference(RNAi) being used commercially in the large scale production of non-browning apples.
The genetically modified non-browning apple hasn't cleared FDA approval yet, but seems close to do it.
The full text of the petition is here:
Artic Apple (Malus Domestica)
A very detailed Q&A with the main man of the company seeking to commercialze the invention here:
Okanagan Fruits president interviewed