, 118:349

Cloning and sequencing of the breakpoint regions of inversion 5g fixed in Drosophila buzzatii

  • Olivia Prazeres da Costa
  • Josefa González
  • Alfredo Ruiz
Research Article

DOI: 10.1007/s00412-008-0201-5

Cite this article as:
Prazeres da Costa, O., González, J. & Ruiz, A. Chromosoma (2009) 118: 349. doi:10.1007/s00412-008-0201-5


Chromosomal inversions are ubiquitous in Drosophila both as intraspecific polymorphisms and interspecific differences. Many gaps still remain in our understanding of the mechanisms that generate them. Previous work has shown that in Drosophila buzzatii, three polymorphic inversions were generated by ectopic recombination between copies of the transposon Galileo. In this study, we have characterized the breakpoint regions of inversion 5g, fixed in D. buzzatii and absent in Drosophila koepferae and other closely related species. A novel approach comprising four experimental steps was used. First, D. buzzatii BAC clones encompassing the breakpoints were identified and their ends sequenced. Then, breakpoint regions were mapped at high resolution in the Drosophila mojavensis genome sequence. Finally, breakpoint regions were isolated by polymerase chain reaction in D. buzzatii and D. koepferae and sequenced. Our aim was to shed light on the mechanism that generated inversion 5g and specifically to test for an implication of the transposon Galileo. No evidence implicates Galileo or other transposable elements in the origin of inversion 5g that was generated most likely by two independent breaks and non-homologous end-joining repair. Our results show that different inversion-generating mechanisms may coexist within the same lineage and suggest a hypothesis for the evolutionary time and mode of their operation.

Supplementary material

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Figure S1

(GIF 178 KB)

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High resolution image file (TIF 1 MB)

Copyright information

© Springer-Verlag 2009

Authors and Affiliations

  • Olivia Prazeres da Costa
    • 1
  • Josefa González
    • 1
    • 2
  • Alfredo Ruiz
    • 1
  1. 1.Departament de Genètica i de Microbiologia, Facultat de BiociènciesUniversitat Autònoma de BarcelonaBellaterraSpain
  2. 2.Department of BiologyStanford UniversityStanfordUSA

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