Noted breeder Rick Jamieson has continued a successful week with Good Oh scoring a debut win at Sandown.

On Monday the Jamieson-bred half-brother to Newmarket Handicap winner The Quarterback was sold for a Melbourne yearling sale record $1.4 million.

Jamieson's record as a breeder includes unbeaten champion Black Caviar, All Too Hard and last year's year's Caulfield Cup winner Jameka.

Good Oh, raced by Jamieson's Gilgai Farm, showed she could be a future stakes performer with her victory in the Hamilton Reid Accountants Plate on Wednesday.

Ridden by Melbourne's leading jockey Craig Williams, Good Oh was backed from $8 to $5.50 before scoring a half-neck win over the $3.20 favourite Fast Stryke with Mutin ($4)) three-quarters of a length away third.

Good Oh was a $220,000 yearling and trainer Mick Kent said the filly had always shown an abundance of ability.

"She's a really nice filly that has shown us heaps at home but she hasn't got the right mind just at the moment," Kent said.

"Because of that we've taken our time with her."

After beginning well, Williams elected to take a sit behind the speed but the filly resented being held up when the pace came out of the 1200m contest.

"We thought we'd be a bit closer in the run than that," Kent said.

"Rather than be trapped wide Craig did the right thing as there was three in front of him so he dropped back.

"But as usual the pace dropped out of the race and she got a bit keen."

Kent said Good Oh would gain a lot from her debut experience and would be given the chance to develop into a stakes race galloper.

He expects her to be suited in races up to a mile as she progresses.

"She'll get a lot out of that today," he said.

"That was her first trip away from home. She's a filly with nice quality about her and I expect her to continue to improve."