Genetic stability of callus vs meristems

[Mark W Galatowitsch <galat002@TC.UMN.EDU>]

Greetings all,

Does anyone know of a good reference showing a direct comparison of
a callus vs meristem cultured plant's genetic stability/instability? I see
a lot of papers where different published results are cited for
comparison but am having a hard time finding a paper where the experiment
was designed to show this difference.

Thanks,

Mark