They include Masons Run, Faaltless, Inquisition and Cangowest, who are engaged at the South Canterbury meeting at Washdyke tomorrow.
Marr (42) has taken employment with trainer Bjorn Baker, who recently set up a stable at Warwick Farm.
"The way things are at the moment in New Zealand it is hard to get ahead," Marr said.
He has been training for 10 years, the last nine at Riccarton after starting out at Ashburton.
He has prepared the winners of 117 races. They include Ombre Rose, who won seven races, including the Warstep Stakes, South Island Breeders Stakes and New Zealand Bloodstock Stakes at Riccarton in the autumn of 2006.
Latta has prepared the winners of 400 races since she began training 14 years ago. She has had group one wins in the 2004 New Zealand Oaks at Trentham (Wharite Princess) and 2006 Zabeel Classic at Ellerslie (Mikki Street).
She has regularly campaigned horses at the major meetings at Riccarton. She has won the Winter Cup there with Mikki Street (2006) and Tuscany Warrior (2003).
She finished third on the trainers' premiership last season with 67 wins behind Michael Pitman (105) and Jon Sargent (75). Pitman uses the Riccarton training facilities and Matamata-based Sargent has a stable there with Andrew Carston the foreman.
Sara Satherley will oversee the Riccarton operation for Latta.
"Having been a regular campaigner at the major Riccarton carnivals, the decision to establish a Canterbury base seems a natural extension of my operation," Latta said.
"It gives greater flexibility to the placement of my horses and therefore opportunities for my owners."
She said she was grateful for clients of the Marr stable transferring their horses to her care.
Tim Mills, the chief executive officer of the CJC, welcomed the decision of owners to transfer horses from Marr to Latta.
"With Shane moving on, the risk was that his team could be scattered and lost to Riccarton, if not the Canterbury region," he said.
Mills thanked Marr for his time as a trainer at Riccarton and his contribution as president of the Canterbury branch of the Trainers' Association.
Peter and Dawn Williams leave the ranks of Riccarton trainers in November when they shift to Byerley Park at Karaka.
• Courtney Van Der Werf, the successful Riccarton apprentice, underwent shoulder reconstruction surgery yesterday. .
She said she would have an arm in a sling for six weeks and be away from race riding for six months. Van Der Werf, who is apprenticed to Michael Pitman, rode 28 winners last season.
• Cape Kinaveral, winner of the maiden steeplechase at Paeroa yesterday, is an acceptor for the Great Northern Steeplechase at Ellerslie on Saturday. The Northern is headed by Hypnotize with 71.5kg, 1kg more than he carried to win the race for the third successive time last year.
Morpheus, a maiden hurdles winner yesterday and stablemate of Cape Kinaveral, is in the Great Northern Hurdles on Saturday.
Myths And Legends, winner of the restricted open steeples yesterday, is also in the Great Northern Steeplechase.
Richard Eynon, who rode both horses yesterday, is on Volkswagin in the Northern. Jo Rathbone takes the mount on Myths And Legends.
• Shankar Muniandy, the Wingatui apprentice, has the mount on Taystar in race 2 (3.30pm) at Wyong today.
Muniandy is on loan to Newcastle trainer Paul Perry under a scholarship provided by New Zealand Thoroughbred Racing.
• The stake for the Levin Classic on November 25 has been increased by $50,000 on the last two years to $250,000, the president of the Levin Racing Club, Bruce McCarrison, announced yesterday.
The club will pay $2000 to the owners of horses finishing 6th to 16th in the race.
The race had a stake of $240,000 in 2006 and 2007.
• Former Riccarton jockey Ashlee Mundy has ridden her first Australian metropolitan winner after the Bevan Laming-trained The Best was successful at Eagle Farm yesterday.
Mundy left Christchurch five months ago because of the earthquakes to join the Brisbane stable of Laming.
Mundy (24), has had 10 rides on Brisbane city tracks but has ridden 10 winners on provincial courses.
