TITLE:
Karyotypic Analysis of the Clipper Barb Enteromius callipterus (Boulenger 1907) from Tahoss Stream, Jos Plateau, Nigeria
AUTHORS:
Michael Olaoluwa Popoola, Precious Tejiri Whisky, Oluwatobiloba Dorcas Oguntoyinbo, Olurotimi Isaac Owootomo
KEYWORDS:
Enteromius, Sex Dimorphism, Karyotype, Chromosome, Barbus
JOURNAL NAME:
Open Journal of Genetics,
Vol.12 No.3,
September
28,
2022
ABSTRACT: The chromosomes of male and female individuals of Enteromius callipterus [1] were
assessed in this study with the objective of determining the diploid chromosome and karyotype. The samples were obtained
from the Tahoss River, Jos Plateau, and the assessment of the chromosomes was conducted using the conventional Giemsa staining technique. The study reveals that
the male individual of E. callipterus has a diploid chromosome number of 2n = 50, the fundamental number of autosomal arms (NFa) of 82, and a karyotype
formula of 2n = 14M + 4m + 32t. However, none of the spreads obtained for the female individuals were either equal to or below the common diploid chromosome number of 50 known for members of the
genus. The two spreads presented here were of 2n equal to 54 and 58.
Although sex dimorphism is rare within the
genus, the present results suggest E.
callipterus show sexual dimorphism at the chromosomal level.