A microsatellite linkage map for Drosophila montana shows large variation in recombination rates, and a courtship song trait maps to an area of low recombination

M. A. Schaefer, D. Mazzi, K. Klappert, H. Kauranen, J. Vieira, A. Hoikkala, M. G. Ritchie, C. Schloetterer

Research output: Contribution to journalArticlepeer-review

14 Citations (Scopus)

Abstract

Current advances in genetic analysis are opening up our knowledge of the genetics of species differences, but challenges remain, particularly for out-bred natural populations. We constructed a microsatellite-based linkage map for two out-bred lines of Drosophila montana derived from divergent populations by taking advantage of the Drosophila virilis genome and available cytological maps of both species. Although the placement of markers was quite consistent with cytological predictions, the map indicated large heterogeneity in recombination rates along chromosomes. We also performed a quantitative trait locus (QTL) analysis on a courtship song character (carrier frequency), which differs between populations and is subject to strong sexual selection. Linkage mapping yielded two significant QTLs, which explained 3% and 14% of the variation in carrier frequency, respectively. Interestingly, as in other recent studies of traits which can influence speciation, the strongest QTL mapped to a genomic region partly covered by an inversion polymorphism.

Original languageEnglish
Pages (from-to)518-527
Number of pages10
JournalJournal of Evolutionary Biology
Volume23
Issue number3
DOIs
Publication statusPublished - Mar 2010

Keywords

  • chromosomal rearrangements
  • inversions
  • mate choice
  • recombination
  • sexual selection
  • speciation
  • CROSS-SPECIES AMPLIFICATION
  • COMB TOOTH NUMBER
  • GENETIC ARCHITECTURE
  • FEMALE PREFERENCE
  • LOCAL ADAPTATION
  • MATING SUCCESS
  • VIRILIS
  • SPECIATION
  • EVOLUTION
  • CHARACTERS

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