Karyological Study of Fresh Water Fish Channa Punctatus with G and NOR Banding Pattern

Abstract

Karyotype analysis is the most classical method in the field of cytogenetics. It includes the determination of 2n chromosome numbers, relative length of chromosomes, centromeric formula, centromeric index, total chromatin length, etc. It describes a technique for taking pictures of a stained preparation in which the chromosomes are arranged in regular centromere patterns. In the present study, the significant karyotype of Channa punctatus were observed by analysing the metacentric, submetacentric, subtelocentric, and telocentric chromosomes. Among these the diploid chromosome number was 32 which were identified to be 14-metacentric, 12- submetacentric and 7- sub telocentric and 7- telocentric chromosomes. Thus, such studies shall be promoted to extend the analysis on the physiological health of fishes in changing environment