Abstract
Karyotypic analyses were made using root tip mitosis in 19 species of South Indian Rosa-ceae. First record of chromosome numbers have been made in Rubus wightii (2n=14), R. rugosus (2n=14), R. fairholmianus (2n=14), R. gardnerianus (2n=14), R. micropetalus (2n=14), Fragaria indica (2n=14), Potentilla leschenaultiana (2n=28) and Alchemilla indica (2n=16). Most of the species studied show 2n=14 and 2n=28 chromosomes. Therefore, it is concluded that euploidy together with karyotype alterations of chromosomes play important role in speciation in Rosaceae.
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