Abstract
The Diopsid stalk-eyed flies are an increasingly well-studied group. Presented here is evidence of the first known transposable elements discovered in these flies. The vertumnana mariner subfamily was identified in the Diopsini tribe, but could not be amplified in species of the Sphyracephalini tribe. PCR screening with degenerate primers revealed that multiple mariner subfamilies are present within the Diopsidae. Most of the sequenced elements appear to be pseudogenes; however two subfamilies are shown to be evolving under purifying selection, raising the possibility that mariner is active in some Diopsid species. Evidence is presented of a possible horizontal transfer event involving an unknown Teleopsis species and the Tephritid fly Bactrocera neohumeralis.
Abbreviations
- dsx :
-
double sex
- GTR+I+Γ:
-
general time reversible nucleotide substitution model, with a proportion of invariant sites and a gamma correction for rate variation amongst sites
- MCMC:
-
Markov chain Monte Carlo
- ML:
-
maximum likelihood
- tnpase :
-
transposase
- mar :
-
Mariner element
- Cs :
-
Cladodiopsis seyrigi
- Dc :
-
Diasemopsis comoroensis
- Dd :
-
Diasemopsis dubia
- Dm :
-
Diasemopsis meigenii
- Ds :
-
Diasemopsis signata
- Sb :
-
Sphyracephala beccarii
- Se :
-
Sphyracephala europaea
- Tb :
-
Teleopsis breviscopium
- Td :
-
Teleopsis dalmanni
- Tqd :
-
Teleopsis quadriguttata
- Tq :
-
Teleopsis quinqueguttata
- Tr :
-
Teleopsis rubicunda
- Ts :
-
Teleopsis species n.
- Tw :
-
Teleopsis whitei
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Acknowledgements
The author is very grateful to Sandie Baldauf for kindly providing laboratory space during the completion of this work. Marion Kotrba provided genomic DNA from C. seyrigi. Andrew Pomiankowski, Kevin Fowler, Hazel Smith and Samuel Cotton kindly provided individuals from all other Diopsid species. John Brookfield provided useful comments on an initial draft of the manuscript. Marianne Frommer and Dick Drew provided comments on aspects of Bactrocera biology. Sara Goodacre, Richard Emes and Gemma Atkinson provided helpful discussion on aspects of the work.
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Carr, M. Multiple subfamilies of mariner transposable elements are present in stalk-eyed flies (Diptera: Diopsidae). Genetica 132, 113–122 (2008). https://doi.org/10.1007/s10709-007-9157-2
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DOI: https://doi.org/10.1007/s10709-007-9157-2