Recent horizontal transfer of mellifera subfamily mariner transposons into insect lineages representing four different orders shows that selection acts only during horizontal transfer

We report the isolation and sequencing of genomic copies of mariner transposons involved in recent horizontal transfers into the genomes of the European earwig, Forficula auricularia; the European honey bee, Apis mellifera; the Mediterranean fruit fly, Ceratitis capitata; and a blister beetle, Epica...

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Bibliographic Details
Published in:Molecular biology and evolution 2003-04, Vol.20 (4), p.554-562
Main Authors: Lampe, David J, Witherspoon, David J, Soto-Adames, Felipe N, Robertson, Hugh M
Format: Article
Language:English
Subjects:
Amino Acid Sequence
Animals
Anopheles - genetics
Apis mellifera
Arthropods - genetics
Base Sequence
Bees - genetics
Ceratitis capitata
DNA Transposable Elements
Epicauta funebris
Evolution, Molecular
Forficula auricularia
Genes, Insect
Genetic Variation
Genome
Insecta - genetics
Mellifera
Molecular Sequence Data
Phylogeny
Selection, Genetic
Transposases
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Summary:We report the isolation and sequencing of genomic copies of mariner transposons involved in recent horizontal transfers into the genomes of the European earwig, Forficula auricularia; the European honey bee, Apis mellifera; the Mediterranean fruit fly, Ceratitis capitata; and a blister beetle, Epicauta funebris, insects from four different orders. These elements are in the mellifera subfamily and are the second documented example of full-length mariner elements involved in this kind of phenomenon. We applied maximum likelihood methods to the coding sequences and determined that the copies in each genome were evolving neutrally, whereas reconstructed ancestral coding sequences appeared to be under selection, which strengthens our previous hypothesis that the primary selective constraint on mariner sequence evolution is the act of horizontal transfer between genomes.
ISSN:0737-4038
1537-1719
DOI:10.1093/molbev/msg069