TY - JOUR AU - Karna Mallick, Pushpa PY - 2018/06/29 Y2 - 2024/03/29 TI - Karyotypic Analysis of four Species of Genus Blumea (Asteraceae) from Nepal JF - International Journal of Applied Sciences and Biotechnology JA - Int J Appl Sci Biotechnol VL - 6 IS - 2 SE - Research Articles: Biological Sciences DO - 10.3126/ijasbt.v6i2.20414 UR - https://www.nepjol.info/index.php/IJASBT/article/view/20414 SP - 115-121 AB - <p>In this study chromosome number determination and karyotype analysis of four species of genus <em>Blumea </em>from the family asteraceae was carried out. The specimen plants were collected from central parts of Nepal, namely  <em>Blumea fistulosa</em> (Roxb.) Kurz,<strong><em> </em></strong><em>Blumea lacera</em> var.<em>glandulosa</em> (DC.) Hook,<strong><em> </em></strong><em>Blumea lacera</em> (Buem f.) DC. and<strong><em>  </em></strong><em>Blumea laciniata</em> DC were observed. The chromosome number in somatic cells were recorded to be 2n= 22 in <em>Blumea fistulosa; </em>2n<em>=</em> 32 in <strong><em> </em></strong><em>Blumea lacera</em> var.<em>glandulosa; 2n=</em>18 in<strong><em> </em></strong><em>Blumea lacera </em>and <em>Blumea laciniata.</em> The range of chromosome length found to be 0.6 to 1.6 µm in  <em>Blumea fistulosa</em>, 0.6 to 1.6µm in<em> Blumea lacera</em> var.<em>glandulosa,</em> 0.6 to 1.7 µm in<em> Blumea lacera</em> and 0.8 to 1.6 µm in<em> Blumea laciniata</em>. Karyotype formula for <em>Blumea fistulosa</em> is M<sub>12</sub>+ sm<sub>10, for </sub><em>Blumea lacera</em> var. <em>glandulosa</em> is M<sub>14</sub>+sm<sub>14</sub>+ st<sub>4,</sub> for <em>Blumea lacera </em>is M<sub>14</sub>+ st<sub>2  </sub>and<em> </em>for <em>Blumea laciniata</em> is M<sub>12</sub>+ sm<sub>6 </sub>in  <em>Blumea laciniata.</em> In this investigation a pair of satellite chromosome found in  only one species <em>Blumea  fistulosa </em>at the end of shot arm of chromosome<em>. </em>Mainly three types of chromosomes observed in this study  having centromere at middle point, at sub-median region and at sub-terminal region. Numerical and structural variation in chromosome are evolutionary significance.  Similarity in size of chromosomes and karyomorphology indicates the homogeneity of the taxa within this tribe.</p><p> <em>Int. J. Appl. Sci. Biotechnol. Vol 6(2): 115-121</em></p> ER -