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https://doi.org/10.2478/cjf-2019-0004

GENETIC DIVERSITY AND POPULATION STRUCTURE ANALYSES OF THREATENED Amblyceps mangois FROM SUB-HIMALAYAN WEST BENGAL, INDIA THROUGH RAPD AND ISSR FINGERPRINTING

Tanmay Mukhopadhyay ; Cell and Molecular Biology Laboratory, Department of Zoology, University of North Bengal, P.O. North Bengal University, Raja Rammohunpur, Siliguri, District Darjeeling, West Bengal, PIN- 734 013, India
Soumen Bhattacharjee ; Cell and Molecular Biology Laboratory, Department of Zoology, University of North Bengal, P.O. North Bengal University, Raja Rammohunpur, Siliguri, District Darjeeling, West Bengal, PIN- 734 013, India


Puni tekst: hrvatski pdf 1.806 Kb

str. 33-50

preuzimanja: 411

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Puni tekst: engleski pdf 1.806 Kb

str. 33-50

preuzimanja: 222

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Sažetak

Amblyceps mangois or the “Indian torrent catfish” is a tropical, freshwater, hill-stream species that has ornamental-commercial value and has been included within the “Endangered” category in the list of threatened freshwater fishes of India. A total fourteen populations from the Terai and Dooars region of northern West Bengal, India were analyzed to studythe genetic architecture of this species with the help of RAPD and ISSR markers. The observed number of alleles (S), Nei’s gene diversity (H) and Shannon’s information index (H´ or I) showed the highest values in the Teesta river system and the lowest values in the Mahananda river system. The UPGMA-based dendrogram and PCoA, based on RAPD and ISSR fingerprints, showed that the Mahananda and the Teesta river populations formed a group distinct from the remaining Jaldhaka river population. We further considered the fourteen riverine populations into nine groups according to the continuity of the water flow for SHE analysis. It was foundthat the three components, i.e. the pattern of diversity (H´), richness (S) and evenness (E), have varied and fluctuated across all fourteen populations from higher to lower altitude as the river flows downstream. AMOVA, PhiPT and genetic hierarchical analyses showed that a distinct hierarchical structure is present in Amblyceps populations in the study region. Low levels of genetic diversity/variation and genetic hierarchical structure with high genetic divergence were found in the present study as an indicator of the recent picture of threatened status of this species. This study is the initial attempt to characterize and evaluate the genetic architecture of the species from this region and there is a scope to manage the evolutionary significant units (ESU) for conservation purpose.

Ključne riječi

indian torrent catfish; genetic hierarchy; she analysis; sub-himalayan hotspot

Hrčak ID:

218074

URI

https://hrcak.srce.hr/218074

Datum izdavanja:

19.3.2019.

Podaci na drugim jezicima: hrvatski

Posjeta: 1.254 *