Cytotaxonomy of Eight Thlaspi L. Sensu Lato (Brassicaceae) Species Endemic to Turkey

Abstract

In this work, the karyomorphology of eight endemic Thlaspi species (T. cariense, T. violascens, T. densiflorum, T. cataonicum, T. elegans, T. rosulare, T. lilacinum and T. aghricum) has been studied for the first time. The chromosome number is defined to be 2n=2x=12 in T. cataonicum, 2n=2x=14 in T. violascens, T. densiflorum, T. lilacinum, 2n=2x=16 in T. cariense, 2n=2x=18 in T. elegans, T. rosulare, and 2n=2x=20 in T. aghricum. It is concluded that generally, species have symmetrical karyotypes, considering the asymmetry indices. The karyotypes of all the species examined have shown variation. Most of the chromosomes of the studied Thlaspi have centromeres at the median and submedian regions. Systematic and evolutionary perspectives of the studied species are debated as per chromosomal data.