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Not AvailableKaryotypic characteristics of Barilius bendelisis from Manipur, northeast India reported here revealed diploid count of 50 chromosomes having a karyotype of 16 metacentric, 14 submetacentric and 20 acrocentric chromosomes with fundamental arm numbers, NF = 80. The results were correlated to the available cytogenetic data and analyses the karyotype variations and chromosomal evolution that occurs in the same species of different geographical locations. No sex chromosomes were observed in the species and the comparative study corroborates the hypothesis of chromosomal evolutionary process like centric inversions were responsible for variation in the karyotypic structure in the species. The present study shows that basic information of chromosome number and morphology analysis, are no longer obsolete and can be used to compare the degree of chromosomal diversity over their geographical range, providing important tools for phylogeographic, evolutionary and taxonomic status besides increasing the existing cytogenetic data of the region.Department of Biotechnology, Government of Indi

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Not AvailableKaryotypic characteristics of Barilius bendelisis from Manipur, northeast India reported here revealed diploid count of 50 chromosomes having a karyotype of 16 metacentric, 14 submetacentric and 20 acrocentric chromosomes with fundamental arm numbers, NF = 80. The results were correlated to the available cytogenetic data and analyses the karyotype variations and chromosomal evolution that occurs in the same species of different geographical locations. No sex chromosomes were observed in the species and the comparative study corroborates the hypothesis of chromosomal evolutionary process like centric inversions were responsible for variation in the karyotypic structure in the species. The present study shows that basic information of chromosome number and morphology analysis, are no longer obsolete and can be used to compare the degree of chromosomal diversity over their geographical range, providing important tools for phylogeographic, evolutionary and taxonomic status besides increasing the existing cytogenetic data of the region.Department of Biotechnology, Government of Indi

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Not AvailableThe Glossogobius giuris (Gobiidae), tank goby a species of goby fish, is native mainly to freshwater and estuaries and has importance in the aquarium trade. It is classified as least concern under IUCN Red List. Live individuals of this species were collected from Loktak Lake in Manipur for cytogenetic investigation to reveal the nucleolar organizer region (NOR) through silver nitrate (AgNO3) and chromomycin A3 (CMA3) staining as well as DAPI staining and single-color fluorescence in situ hybridization (FISH) using 18S rDNA sequence as probe. Analysis of more than 50 metaphase chromosome complement (obtained from colchicine–potassium chloride–Carnoy’s fixation–Giemsa staining procedures) showed the presence of 46 diploid chromosome numbers with all telocentric having fundamental arm number as 46 without any heteromorphic pair. One pairs of silver-stained NORs, situated terminally on the telocentric chromosome, were observed. Similarly, one pair of CMA3-positive sites were observed on the chromosome that suggested abundance of GC-rich repetitive DNAs in this region. One pair of 18S rDNA positive sites was observed on the telocentric chromosomes using FISH. These karyological features can be useful markers in cytotaxonomy and conservation of this species.Department of Biotechnology, Ministry of Science and Technology, Government of India, for financial support through Project Sanction No. BT/13/NE/TBP/201