A study of karyotypes and their alterations in cultured and Agrobacterium transformed roots of Lycopersicon peruvianum Mill.

Organ culture, plant regeneration from callus culture, and hairy root disease caused by Agrobacterium rhizogenes were utilized as methods of rapid in vitro propagation in Lycopersicon peruvianum Mill. A detailed and comparative karyotype analysis of the resulting material under such in vitro conditions revealed karyotypic stability under organ culture method, ploidy change in callus derived plants, and minor structural alterations of chromosomes in roots transformed by A. rhizogenes.