The Andaman day gecko paradox: an ancient endemic without pronounced phylogeographic structure.

Scientific Reports
Ashwini Venkatanarayana MohanMiguel Vences

Abstract

The Andaman day gecko (Phelsuma andamanensis) is endemic to the Andaman Archipelago, located ~ 6000 km away from Madagascar where the genus Phelsuma likely evolved. We complemented existing phylogenetic data with additional markers to show that this species consistently branches off early in the evolution of the genus Phelsuma, and this early origin led us to hypothesize that island populations within the Andaman Archipelago could have further diversified. We sampled the Andaman day gecko from all major islands in the Andamans, developed new microsatellite markers and amplified mitochondrial markers to study population diversification. We detected high allelic diversity in microsatellites, but surprisingly poor geographical structuring. This study demonstrates that the Andaman day gecko has a panmictic population (K = 1), but with weak signals for two clusters that we name 'North' (North Andaman, Middle Andaman, Interview, Baratang, Neil, and Long Islands) and 'South' (Havelock, South Andaman, Little Andaman Islands). The mitochondrial COI gene uncovered wide haplotype sharing across islands with the presence of several private haplotypes (except for the Little Andaman Island, which only had an exclusive private haplotype) sign...Continue Reading

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Citations

May 5, 2021·Scientific Reports·Manokaran KamalakannanKailash Chandra

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Datasets Mentioned

BETA
MT677531-MT679993

Methods Mentioned

BETA
genotyping
PCR
Polymerase Chain Reaction
electrophoresis
Illumina sequencing

Software Mentioned

CorelDraw student X
admix
genepop package
DnaSP
DIY
Poppr
RaxML
Structure
GeoMapApp
Microsatellite Analyzer ( MSA )

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