The genetic architecture of sexually selected traits in two natural populations of Drosophila montana

Veltsos, Paris; Gregson, Emma; Morrissey, Barbara J.; Slate, Jon; Hoikkala, Anneli; Butlin, Roger K.; Ritchie, Michael G.

doi:10.1038/hdy.2015.63

Cited by 8 publications

(6 citation statements)

References 65 publications

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“…We used a subset of the genetic markers described in Veltsos et al (2015), see Additional file 1 (Dryad Digital Repository: http://dx.doi.org/10.5061/dryad.085vq). The SNP markers were analyzed in Cervus v3.0.7 (Kalinowski et al 2007).…”

Section: Paternity Tests and Population Differentiation With Snp Markersmentioning

confidence: 99%

Postmating–prezygotic isolation between two allopatric populations of Drosophila montana: fertilisation success differs under sperm competition

Ala‐Honkola

Ritchie

Veltsos

2016

Ecology and Evolution

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Postmating but prezygotic (PMPZ) interactions are increasingly recognized as a potentially important early‐stage barrier in the evolution of reproductive isolation. A recent study described a potential example between populations of the same species: single matings between Drosophila montana populations resulted in differential fertilisation success because of the inability of sperm from one population (Vancouver) to penetrate the eggs of the other population (Colorado). As the natural mating system of D. montana is polyandrous (females remate rapidly), we set up double matings of all possible crosses between the same populations to test whether competitive effects between ejaculates influence this PMPZ isolation. We measured premating isolation in no‐choice tests, female fecundity, fertility and egg‐to‐adult viability after single and double matings as well as second‐male paternity success (P2). Surprisingly, we found no PMPZ reproductive isolation between the two populations under a competitive setting, indicating no difficulty of sperm from Vancouver males to fertilize Colorado eggs after double matings. While there were subtle differences in how P2 changed over time, suggesting that Vancouver males’ sperm are somewhat less competitive in a first‐male role within Colorado females, these effects did not translate into differences in overall P2. Fertilisation success can thus differ dramatically between competitive and noncompetitive conditions, perhaps because the males that mate second produce higher quality ejaculates in response to sperm competition. We suggest that unlike in more divergent species comparisons, where sperm competition typically increases reproductive isolation, ejaculate tailoring can reduce the potential for PMPZ isolation when recently diverged populations interbreed.

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Section: Paternity Tests and Population Differentiation With Snp Markersmentioning

confidence: 99%

Postmating–prezygotic isolation between two allopatric populations of Drosophila montana: fertilisation success differs under sperm competition

Ala‐Honkola

Ritchie

Veltsos

2016

Ecology and Evolution

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“…However, neither of these genes contributes to interspecific differences in song rhythm [ 51 ]. Other genes, including slowpoke and cacophony , have been implicated in species and population differences across Drosophila species: these genes control the properties of the ion (calcium and potassium) channels at neuromuscular junctions [ 52 , 53 , 54 , 55 ] and can transform the output of neuronal networks including central pattern generators [ 56 ]. Therefore, we may expect similar neuromodulators as well as genes involved in the synaptic transmission at the neuromuscular junctions and rhythmic behavior to contribute to variation in song rhythm in crickets.…”

Section: Introductionmentioning

confidence: 99%

The Genetics of a Behavioral Speciation Phenotype in an Island System

Blankers

Shaw

2018

Genes

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Mating behavior divergence can make significant contributions to reproductive isolation and speciation in various biogeographic contexts. However, whether the genetic architecture underlying mating behavior divergence is related to the biogeographic history and the tempo and mode of speciation remains poorly understood. Here, we use quantitative trait locus (QTL) mapping to infer the number, distribution, and effect size of mating song rhythm variations in the crickets Laupala eukolea and Laupala cerasina, which occur on different islands (Maui and Hawaii). We then compare these results with a similar study of an independently evolving species pair that diverged within the same island. Finally, we annotate the L. cerasina transcriptome and test whether the QTL fall in functionally enriched genomic regions. We document a polygenic architecture behind the song rhythm divergence in the inter-island species pair that is remarkably similar to that previously found for an intra-island species pair in the same genus. Importantly, the QTL regions were significantly enriched for potential homologs of the genes involved in pathways that may be modulating the cricket song rhythm. These clusters of loci could constrain the spatial genomic distribution of the genetic variation underlying the cricket song variation and harbor several candidate genes that merit further study.

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“…; Veltsos et al. ). This has also recently been illustrated in a study on sperm morphology and swimming speed, polygenic traits that predict fertilizing advantage in zebra finch (Kim et al.…”

mentioning

confidence: 97%

Masculinization of gene expression is associated with male quality inDrosophila melanogaster

et al. 2018

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The signature of sexual selection has been revealed through the study of differences in patterns of genome-wide gene expression, both between the sexes and between alternative reproductive morphs within a single sex. What remains unclear, however, is whether differences in gene expression patterns between individuals of a given sex consistently map to variation in individual quality. Such a pattern, particularly if found in males, would provide unambiguous evidence that the phenotypic response to sexual selection is shaped through sex-specific alterations to the transcriptome. To redress this knowledge gap, we explored whether patterns of sex-biased gene expression are associated with variation in male reproductive quality in Drosophila melanogaster.We measured two male reproductive phenotypes, and their association with sex-biased gene expression, across a selection of inbred lines from the Drosophila Genetic Reference Panel. Genotypes with higher expression of male-biased genes produced males exhibiting shorter latencies to copulation, and higher capacity to inseminate females. Conversely, female-biased genes tended to show negative associations with these male reproductive traits across genotypes. We uncovered similar patterns, by reanalyzing a published dataset from a second D. melanogaster population. Our results reveal the footprint of sexual selection in masculinising the male transcriptome.

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The genetic architecture of sexually selected traits in two natural populations of Drosophila montana

Cited by 8 publications

References 65 publications

Postmating–prezygotic isolation between two allopatric populations of Drosophila montana: fertilisation success differs under sperm competition

Postmating–prezygotic isolation between two allopatric populations of Drosophila montana: fertilisation success differs under sperm competition

The Genetics of a Behavioral Speciation Phenotype in an Island System

Masculinization of gene expression is associated with male quality inDrosophila melanogaster

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