Denis Leamy has criticised Ireland boss Joe Schmidt for selecting too many of his former charges from old club Leinster.
The former Munster and Ireland back-row was angry at the coach's decision to drop Ulster fly-half Paddy Jackson from his squad in favour of Ian Madigan.
"I think what rankles with Munster people - and I suspect some folk in Ulster- is that guys who aren't first choice in Leinster are still good enough for the national squad," Leamy wrote in the Irish Independent.
"I would have to disagree with some of the calls. Tommy O'Donnell lost his place on the bench, I think he is a better player than Jordi Murphy.
"I would argue that Donnacha Ryan brings more to the table than Rhys Ruddock and you just have to wonder what Simon Zebo - a Lion last summer - has to do to get back into the squad. Paddy Jackson has a more rounded game at the moment than Ian Madigan.
"The World Cup is just a year and a half away. The circle will need to be widened and not having done that in the Six Nations narrows the opportunities."