Abstract: Chromosome complement of Neurobasis chinensis chinensis has been characterized by conventional staining and C-banding. The specimens were collected from Sadhupul (Solan), Ghumarwin (Bilaspur) of Himachal Pradesh and Lachhiwala (Dehradun) of Uttarakhand states of India. The species possesses 2n=23 as the diploid chromosome number with XO-XX sex determination. Morphological variation in the chromosome complement has been observed in the species collected from different localities. In the spermatogonial metaphase, two large sized autosome pairs are present in specimens of Lachhiwala (Dehradun) and Sadhupul (Solan) and one large pair and other smaller than it are seen in specimens of Ghumarwin (Bilaspur). Similarly, in the diakinesis, two equal sized, large autosomal bivalents possess two interstitial and terminal chiasmata in the specimens of Lachhiwala (Dehradun) and Sadhupul (Solan). On the other hand, one extra large autosomal bivalent shows terminal and interstitial chiasmata, while second small bivalent reveals terminal chiasmata as remaining bivalents in the specimens of Ghumarwin (Bilaspur). These variations have also been confirmed by C-banding. In the diakinesis, C-bands are mostly present at the terminal ends of all the bivalents, while both the autosomal bivalents of Lachhiwala (Dehradun) and Sadhupul (Solan) specimens and one extra large autosomal bivalent of Ghumarwin (Bilaspur) specimens possess terminal as well as interstitial C-bands. X chromosome is C-positive throughout the length in all the specimens.
Keywords: Dragonfly; Odonata; Zygoptera; Calopterygidae; Morphological variation; C-banding; Conventional staining.
Title: Morphological variation in the chromosome complement of Neurobasis chinensis chinensis of family Calopterygidae (Odonata: Zygoptera)
Author: Gurinder Kaur Walia, Neha Katnoria
International Journal of Life Sciences Research
ISSN 2348-313X (Print), ISSN 2348-3148 (online)
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