Dr. Mohammad Lutfar Rahman Associate Professor, Department of Genetics & fish Breeding Bangabandhu Sheikh Mujibur Rahman Agricultural University Department of Genetics & fish Breeding Faculty of Fisheries Bangabandhu Sheikh Mujibur Rahman Agricultural University Phone: 02 9205310-4 (Ext. 2493) Fax : 02 9205338 Mobile no.: +8801710586058 E-mail: mlrahman@bsmrau.edu.bd ; lrgolap_bau@yahoo.com