Osvaldo and Isis retrotransposons as markers of the Drosophila buzzatii colonisation in Australia |
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Authors: | María Pilar García Guerreiro and Antonio Fontdevila |
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Institution: | (1) Grup de Biolog?a Evolutiva. Departament de Gen?tica i Microbiologia, Facultat de Bioci?ncies, Universitat Aut?noma de Barcelona, 08193 Bellaterra, Barcelona, Spain |
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Abstract: | Background Transposable elements (TEs) constitute an important source of genetic variability owing to their jumping and regulatory properties,
and are considered to drive species evolution. Several factors that are able to induce TE transposition in genomes have been
documented (for example environmental stress and inter- and intra-specific crosses) but in many instances the reasons for
TE mobilisation have yet to be elucidated. Colonising populations constitute an ideal model for studying TE behaviour and
distribution as they are exposed to different environmental and new demographic conditions. In this study, the distribution
of two TEs, Osvaldo and Isis, was examined in two colonising populations of D. buzzatii from Australia. Comparing Osvaldo copy numbers between Australian and Old World (reported in previous studies) colonisations provides a valuable tool for elucidating
the colonisation process and the effect of new conditions encountered by colonisers on TEs. |
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