The complex genetic architecture of male mate choice evolution between Drosophila species

Shahandeh, Michael P.; Turner, Thomas L.

doi:10.1038/s41437-020-0309-9

Cited by 15 publications

(12 citation statements)

References 83 publications

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“…Empirical support for the clustering of contributing loci comes from the molecular dissection of candidate loci identified in QTL mapping studies. Single QTL loci can be broken into multiple SNPs contributing to the corresponding trait [78][79][80][81][82][83].…”

Section: Linkage Disequilibriummentioning

confidence: 99%

The genetic architecture of temperature adaptation is shaped by population ancestry and not by selection regime

Otte

Nolte²,

Mallard

et al. 2021

Genome Biol

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Background Understanding the genetic architecture of temperature adaptation is key for characterizing and predicting the effect of climate change on natural populations. One particularly promising approach is Evolve and Resequence, which combines advantages of experimental evolution such as time series, replicate populations, and controlled environmental conditions, with whole genome sequencing. Recent analysis of replicate populations from two different Drosophila simulans founder populations, which were adapting to the same novel hot environment, uncovered very different architectures—either many selection targets with large heterogeneity among replicates or fewer selection targets with a consistent response among replicates. Results Here, we expose the founder population from Portugal to a cold temperature regime. Although almost no selection targets are shared between the hot and cold selection regime, the adaptive architecture was similar. We identify a moderate number of targets under strong selection (19 selection targets, mean selection coefficient = 0.072) and parallel responses in the cold evolved replicates. This similarity across different environments indicates that the adaptive architecture depends more on the ancestry of the founder population than the specific selection regime. Conclusions These observations will have broad implications for the correct interpretation of the genomic responses to a changing climate in natural populations.

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Section: Linkage Disequilibriummentioning

confidence: 99%

The genetic architecture of temperature adaptation is shaped by population ancestry and not by selection regime

Otte

Nolte²,

Mallard

et al. 2021

Genome Biol

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show abstract

“…It seems reasonable that such regions contributing to local adaptation would show marked differences in their TE content, number of genes under selection or other types of genomic divergence (Bohne et al, 2008 ; Brawand et al, 2014 ). QTL responsible for species divergence could also include multiple loci spanning substantial components of the genome that influence the same or even multiple adaptively diverging traits (Erickson et al, 2018 ; Nelson et al, 2019 ; Pardo‐Diaz & Jiggins, 2014 ; Shahandeh & Turner, 2020 ). Midas cichlids have diverged in parallel along the limnetic‐benthic axis in crater Lake Apoyo and crater Lake Xiloá in multiple traits along strikingly similar phenotypic trajectories (Elmer et al, 2014 ).…”

Section: Introductionmentioning

confidence: 99%

The comparative genomic landscape of adaptive radiation in crater lake cichlid fishes

et al. 2021

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Factors ranging from ecological opportunity to genome composition might explain why only some lineages form adaptive radiations. While being rare, particular systems can provide natural experiments within an identical ecological setting where species numbers and phenotypic divergence in two closely related lineages are notably different. We investigated one such natural experiment using two de novo assembled and 40 resequenced genomes and asked why two closely related Neotropical cichlid fish lineages, the Amphilophus citrinellus species complex (Midas cichlids; radiating) and Archocentrus centrarchus (Flyer cichlid; nonradiating), have resulted in such disparate evolutionary outcomes. Although both lineages inhabit many of the same Nicaraguan lakes, whole‐genome inferred demography suggests that priority effects are not likely to be the cause of the dissimilarities. Also, genome‐wide levels of selection, transposable element dynamics, gene family expansion, major chromosomal rearrangements and the number of genes under positive selection were not markedly different between the two lineages. To more finely investigate particular subsets of the genome that have undergone adaptive divergence in Midas cichlids, we also examined if there was evidence for ‘molecular pre‐adaptation’ in regions identified by QTL mapping of repeatedly diverging adaptive traits. Although most of our analyses failed to pinpoint substantial genomic differences, we did identify functional categories containing many genes under positive selection that provide candidates for future studies on the propensity of Midas cichlids to radiate. Our results point to a disproportionate role of local, rather than genome‐wide factors underlying the propensity for these cichlid fishes to adaptively radiate.

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“…For example, pre-mating isolation in several Drosophila sibling species is based on male responses to female CHC profiles (Coyne et al, 1994;Billeter et al, 2009;Seeholzer et al, 2018;Shahandeh et al, 2018). Based on quantitative trait locus (QTL) studies dissecting female CHC profiles (Gleason et al, 2005(Gleason et al, , 2009 and male courtship preferences (Shahandeh et al, 2018;Shahandeh and Turner, 2020), the most parsimonious scenario is that female CHC profiles diverged due to differences in microclimatic conditions, followed by divergence in male courtship preferences to avoid costly interspecific courtship and mating (Rundle and Dyer, 2015;Shahandeh and Turner, 2020).…”

Section: Question 7: How Do Individuals That Adapted To An Alternative Food Resource Become Reproductively Isolated?mentioning

confidence: 99%

Seven Questions on the Chemical Ecology and Neurogenetics of Resource-Mediated Speciation

et al. 2021

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Adaptation to different environments can result in reproductive isolation between populations and the formation of new species. Food resources are among the most important environmental factors shaping local adaptation. The chemosensory system, the most ubiquitous sensory channel in the animal kingdom, not only detects food resources and their chemical composition, but also mediates sexual communication and reproductive isolation in many taxa. Chemosensory divergence may thus play a crucial role in resource-mediated adaptation and speciation. Understanding how the chemosensory system can facilitate resource-mediated ecological speciation requires integrating mechanistic studies of the chemosensory system with ecological studies, to link the genetics and physiology of chemosensory properties to divergent adaptation. In this review, we use examples of insect research to present seven key questions that can be used to understand how the chemosensory system can facilitate resource-mediated ecological speciation in consumer populations.

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The complex genetic architecture of male mate choice evolution between Drosophila species

Cited by 15 publications

References 83 publications

The genetic architecture of temperature adaptation is shaped by population ancestry and not by selection regime

The genetic architecture of temperature adaptation is shaped by population ancestry and not by selection regime

The comparative genomic landscape of adaptive radiation in crater lake cichlid fishes

Seven Questions on the Chemical Ecology and Neurogenetics of Resource-Mediated Speciation

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