Distribution of constitutive heterochromatin in four species of genus Copera of family Platycnemididae (Odonata: Zygoptera) from India
Journal Title: International Journal of Life Science - Year 2018, Vol 6, Issue 2
Abstract
C–heterochromatin distribution in four species of genus Copera of family Platycnemididae have been described. Copera marginipes and Copera vittata assamensis were collected from Bilaspur and Renuka lake (Sirmour, Himachal Pradesh), respectively, while Copera annulata and Copera vittata were collected from Nongkhyllem (Meghalaya), India. All the species possess n=13m as haploid chromosome number, which is the type number of the family and X0-XX sex determining mechanism. In all the species, autosomal bivalents show dark/light terminal C-bands on chiasmatic/nonchiasmatic ends, while m bivalent and X chromosome possess variation in distribution of C-heterochromatin. m bivalent is C-negative in Copera marginipes, while shows terminal C-bands in Copera annulata, Copera vittata and Copera vittata assamensis. X chromosome possesses less amount of C-heterochromatin in Copera marginipes, Copera annulata and Copera vittata, whereas X chromosome is bipartite and entirely C-negative in Copera vittata assamensis. Chromosome complement of Copera vittata assamensis has been studied for the first time.
Authors and Affiliations
Walia Gurinder Kaur, Monika Devi
Keywords
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