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High divergence across the whole mitochondrial genome in the "pan-Antarctic" springtail Friesea grisea: Evidence for cryptic species?

Torricelli, Giulia; Carapelli, Antonio; Convey, Peter; Nardi, Francesco; Boore, Jeffrey L.; Frati, Francesco. 2010 High divergence across the whole mitochondrial genome in the "pan-Antarctic" springtail Friesea grisea: Evidence for cryptic species? Gene, 449 (1-2). 30-40. 10.1016/j.gene.2009.09.006

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Abstract/Summary

Collembola are one of the few hexapod groups adapted to live in the harsh environmental conditions of Antarctic terrestrial ecosystems. Diversity is limited to a few species that can be very abundant in coastal deglaciated sites. A remarkable lack of overlap in Collembola species composition is evident between Western and Eastern Antarctica, and Friesea grisea is currently the only species whose distribution is thought to span these two main regions of the continent. However, our analysis of the complete sequences of the mitochondrial genomes from specimens obtained from each of the two regions showed unexpected genetic divergence, well above the average levels observed between populations belonging to the same species, and so indicating that these are actually separate species, despite their lack of distinguishing morphology. Detailed analysis of the two genomes showed the presence of a non-coding region observed between trnS (uga) and nad1. Other features of these mitochondrial genomes, such as base compositional bias, secondary structure features of tRNAs and the presence of regulatory elements in the control region, are described and discussed from an evolutionary standpoint. (C) 2009 Elsevier B.V. All rights reserved.

Item Type: Publication - Article
Digital Object Identifier (DOI): 10.1016/j.gene.2009.09.006
Programmes: BAS Programmes > Polar Science for Planet Earth (2009 - ) > Ecosystems
ISSN: 0378-1119
Additional Keywords: Collembola; Antarctica; mtDNA; Cryptic species
NORA Subject Terms: Biology and Microbiology
Zoology
Ecology and Environment
Date made live: 15 Nov 2010 09:46
URI: http://nora.nerc.ac.uk/id/eprint/11327

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