TY - JOUR AU - Hossain, A AU - Kabir, G AU - Ud-deen, MM AU - Alam, AMS PY - 2009/03/17 Y2 - 2024/03/28 TI - Cytological Studies of Nymphaea Species available in Bangladesh JF - Journal of Bio-Science JA - J bio-sci. VL - 15 IS - 0 SE - Articles DO - 10.3329/jbs.v15i0.2197 UR - https://banglajol.info/index.php/JBS/article/view/2197 SP - 7-13 AB - <p>The present investigation was undertaken in order to study the somatic karyotypes of four species of <em>Nymphaea </em>available in Bangladesh. Karyotypes of four species of <em>Nymphaea </em>revealed that most of the chromosomes were metacentric indicating their primitive nature and chromosome counts revealed a polyploid series of tetraploid, pentaploid and hexaploid based on X=14. Findings of the present study indicated that <em>Nymphaea pubescens </em>is a hexaploid (6X=84, white flower) which might have originated by chromosome doubling of <em>Nymphaea daubeniana </em>(3X=42) while <em>Nymphaea rubra </em>and <em>Nymphaea nouchali </em>(Type-1) are tetraploid (4X=56) species.</p> <p><strong>Key words: </strong><em>Nymphaea</em>, karyotype  </p> <p>doi: 10.3329/jbs.v15i0.2197</p> <p>J. bio-sci. 15: 7-13, 2007  </p> ER -