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Signals of adaptive mitogenomic evolution in an indigenous Cichlid, Etroplus suratensis (Bloch, 1790) from India

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Relation http://eprints.cmfri.org.in/14729/
https://www.sciencedirect.com/science/article/pii/S2352485520306745
https://doi.org/10.1016/j.rsma.2020.101546
 
Title Signals of adaptive mitogenomic evolution in an indigenous Cichlid,
Etroplus suratensis (Bloch, 1790) from India
 
Creator Sukumaran, Sandhya
 
Subject Fish Genetics
 
Description Etroplus suratensis is one of the most important indigenous Cichlids of the Indian subcontinent
exhibiting restricted distribution in the estuaries of peninsular India and Sri Lanka. Coastal pollution
and climate change contribute to the deterioration of their habitats. Etroplus suratensis is widely
distributed along estuaries and brackishwater lakes of India which make them ideal candidates for
investigations on adaptation and selection on mitochondrial Oxidative Phosphorylation (OXPHOS)
genes. We investigated the selection patterns in the OXPHOS system of E. suratensis by comparing
OXPHOS genes of 105 fishes collected from different eco-regions in India. Signals of positive and
diversifying selection observed in the mitogenomes were correlated with habitat characteristics.
Habitat specific mutational signals observed have adaptive significance as the populations of the study
represented humid tropical climatic zones constituting rainforests in the southwest, semi-arid zones
in the southeast and humid subtropical zones in the northeast regions of India. Adaptation to these
environmentally heterogeneous habitats generates genotypic and phenotypic variants with specific
metabolic or bioenergetic requirements. The observed adaptive mitogenome evolution may be the
imprints of this geographic variability, genetic drift and selective forces imparted by the distinctive
ecoregions which form their habitats.
 
Publisher Elsevier B.V.
 
Date 2020
 
Type Article
PeerReviewed
 
Format text
 
Language en
 
Identifier http://eprints.cmfri.org.in/14729/1/Regional%20Studies%20in%20Marine%20Science_2020_Sandhya%20Sukumaran_Etroplus%20rsma%20adaptive%20evolution.pdf
Sukumaran, Sandhya (2020) Signals of adaptive mitogenomic evolution in an indigenous Cichlid, Etroplus suratensis (Bloch, 1790) from India. Regional Studies in Marine Science, 40. pp. 1-11.