Tropical Plant Research

Susmita Saha, Meghla Saha Pinky, Suma Akter and Kazi Nahida Begum*

*Department of Botany, Faculty of Life and Earth Sciences, Jagannath University, Dhaka, Bangladesh

DOI: https://doi.org/10.22271/tpr.2020.v7.i2.056

Abstract:
In the present research, karyomorphological characters of twelve varieties of Brassica, released by Bangladesh Agricultural Research Institute (BARI) were investigated for appropriate characterization and assuming interrelations among them. Among these, six varieties of Brassica campestris (Tori-7, SS-75, BS-6, BS-12, BS-14 and BS-15) showed 2n=20 chromosomes, whereas 2n=36 were observed in four varieties of B. juncea (Dawlat, Rai-5, BS-10 and BS-11) and 2n=38 were found in two varieties of B. napus (BS-7 and BS-8).Depending on the karyotype symmetry-asymmetry conditions, the AI versus CV_CI graph flatly divided these twelve varieties into Group-I as primitive and Group-II as advanced in characteristics. Moreover, notable karyotype diversity was observed in varieties of Brassica L. which could be used for their proper characterization.