Quorto emulated his sire Dubawi when winning the Goffs Vincent O’Brien National Stakes at the Curragh.
Appleby said: “Coming here today we were very confident. Full credit to the team at home, Mark Rimmer rides her.
“He’s a typical Dubawi and we went through that stage from the Superlative to here where he went a little bit quiet on us and he needed all of that time.
“That’s just typical with Dubawi. I’m in a fortunate position that I’ve probably got the most experience with Dubawis. They go through that patch, but in the last 10 days he’s really come back to where he was before the Superlative.
“The team were all confident coming into today that he was as good as he was, if not a bit better, than he was going to the Superlative.
“We had a lot of confidence and it was just a matter of seeing where we were. I feel now he’s put himself there as hopefully a contender for the Guineas next year.
“His Highness Sheikh Mohammed was straight on the phone afterwards and delighted with the result.”
Asked about plans, Appleby said: “It’s a nice conversation to have, but I’m sure we’ll probably be looking towards the Dewhurst.