Cytogenetic characterization of Devario aequipinnatus (McClelland, 1839) and Devario yuensis (Arunkumar and Tombi, 1998) (Cypriniformes: Cyprinidae) from Manipur, northeast India

Authors : Sanjabihari SUKHAM, Brajakishor CHINGAKHAM, Labee THOIDINGJAM, Gusheinzed WAIKHOM

Pages : 706-712

Doi:10.3906/vet-1211-26

View : 18 | Download : 7

Publication Date : 0000-00-00

Article Type : Research Paper

Abstract :Cytogenetic characteristics of Devario aequipinnatus insert ignore into journalissuearticles values(McClelland, 1839); and Devario yuensis insert ignore into journalissuearticles values(Arunkumar and Tombi, 1998); from northeast India were studied by examining metaphase chromosome spreads from gill, epithelial, and kidney cells. The diploid chromosome numbers of both species were 2n = 50. The karyotypes consisted of 3 pairs of metacentric, 17 pairs of submetacentric, 3 pairs of subtelocentric, and 2 pairs of acrocentric chromosomes having the arm numbers NF = 96 in D. aequipinnatus; and 5 pairs of metacentric, 13 pairs of submetacentric, 6 pairs of subtelocentric, and 1 pair of acrocentric chromosomes having the fundamental arm numbers NF = 98 in D. yuensis. No sex chromosomes were detected cytologically in either of the species. The present study is the first report on the karyology of these 2 species from northeast India. Comparison of the chromosome numbers of these 2 fishes with those of other members of closely related genera of the subfamily Danioninae shows that 2n = 50 could be considered as a modal diploid chromosome number in this fish subfamily.
Keywords : Key words 2n chromosome, metaphase, Devario aequipinnatus, Devario yuensis, Danioninae