Morrisons plans to close 132 of its loss-making McColl's convenience stores, putting 1,300 jobs at risk.
It comes after the supermarket group agreed to buy McColl's out of administration in May.
The BBC says workers who could be made redundant will be offered jobs elsewhere in the business.
Morrisons now plans to convert most of its remaining McColl's stores into Morrisons Daily shops as it tries to revive the chain's fortunes.
There are currently 1,164 McColl's stores trading, 286 of which operate under the Morrisons Daily brand.
Morrisons said all of the stores set to close were loss-making and had "no realistic prospect" of recovering soon.
Shops to go are around Britain
The shops are distributed around England, Scotland and Wales.
There are 17 McColl's in the Aberdeen area, but it is not known yet how many may be affected by yesterday's announcement.
The majority of those to go will be closed "in an orderly fashion" over the rest of this year, Morrisons added.
The grocer said workers at risk of redundancy "will be offered alternative employment at a nearby McColl's store, Morrisons store, logistics operation or food-making centre".
Out of the stores to close, 55 have a Post Office counter.
Morrisons said it would delay shutting these stores until next year to let them serve local communities during Christmas and "to allow the Post Office additional time to make alternative arrangements".
Deal cleared
Last week, competition regulators cleared Morrisons to buy McColl's.
The supermarket chain had already said it would sell 28 McColl's stores to overcome competition concerns.
McColl's is a business "of significant scale", Morrisons added, with an annual turnover of £1.2billion. It accounts for about 0.8% of the UK grocery market.
The supermarket group said no further store closures were currently being considered, but it remains in talks with "a number of landlords of challenged stores".
Morrisons' chief executive David Potts said after the green light from the competition watchdog that the retailer was "now able to begin the urgent journey to transform McColl's into a viable, well-invested and growing operation".
FTSE 100
The UK's top share index, the FTSE 100, was up 14 points at 7,200 shortly after opening this morning, following yesterday's 91-point gain.
Brent crude futures were 0.86% higher at $95.46 a barrel.
Companies reporting today
- Half-year results: Wizz Air
- Third-quarter results: GlaxoSmithKline
- Third-quarter update: Hiscox, Next, Smurfit Kappa Group, Weir Group