Karyotyping in the Freshwater Prawn Macrobrachium Malcolmsonii (Milne-Edwards, 1844), Decapoda

By : Anne Rebecca A , John Merston , Saravana Bhavan

Page No: 275-285

Abstract
Decapod karyology is one of the least studied areas. M. malcolmsonii, a freshwater species of the order decapoda is karyologically analysed for chromosome number, arm length, arm ratio and centromere position using a compound light microscope and an ocular micrometer. Based on the measurements using the micrometer, chromosomes were grouped. A karyogram and an ideogram were prepared. The diploid set (2n) of chromosomes from 100 metaphase spreads were found to have a modal value of 118. 26 pairs of metacentric, 9 pairs of sub-metacentric, 2 pairs of sub[1]metacentric/sub-telocentric, 2 pairs of subtelocentric and 20 pairs of telocentric chromosomes were observed and grouped using a standard nomenclature described by Levan et al., (1964)

Authors :
Anne Rebecca A, John Merston and Saravana Bhavan
P. Department of Zoology (PG-SF), PSG College of Arts and Science, Coimbatore-641014, Tamil Nadu, India.
 

DOI: http://doi.org/10.32381/JAT.2019.34.3-4.14