Males evolve to be more harmful under increased sexual conflict intensity in a seed beetle

McNamara, Kathryn B.; Sloan, Nadia S.; Kershaw, Sian E; Simmons, Leigh W.

doi:10.1093/beheco/arz186

Cited by 12 publications

(25 citation statements)

References 41 publications

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“…Our study provides evidence that genital coevolution may be triggered by changes in one sex, and the resulting precedence pattern may persist at long time scales. Although empirical evidence in favour of either male‐ or female‐driven coevolution is to date elusive, experimental studies seem to indicate that increased sexual conflict tends to affect male morphology earlier (Cayetano et al., 2011; McNamara, Sloan, Kershaw, & Lieshout, 2020). In contrast, here we found that the vast majority of changes to membranization in females departed from the ancestral form, whereas transitions in the male proctiger were overwhelmingly contingent on preceding female changes (Figure 3).…”

Section: Discussionmentioning

confidence: 99%

Female‐driven intersexual coevolution in beetle genitalia

Genevcius¹,

Baker

Bianchi

et al. 2020

J of Evolutionary Biology

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Across the tree of life, male-female genital coevolution has been demonstrated in over 40 studies of vertebrates and invertebrates (Brennan & Prum, 2015), and it is likely to be even more prevalent than currently thought (Yassin, 2016). Coevolution of genitalia may arise when male and female traits are either functionally entangled or/and developmentally constrained under a pleiotropic effect. Functional integration between male and female genitals may generate coevolution through a variety of mechanisms such as female choice, avoidance of sperm competition, and species reinforcement

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Section: Discussionmentioning

confidence: 99%

Female‐driven intersexual coevolution in beetle genitalia

Genevcius¹,

Baker

Bianchi

et al. 2020

J of Evolutionary Biology

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“…This was expected because the reduction of conflict should favour less harmful males and females that are less resistant to male harm. Other experimental evolution studies under altered mating systems have been performed in dung flies Martin & Hosken, 2003), different species of fruit flies (D. melanogaster; (Gerrard et al, 2013;Hollis et al, 2014;Innocenti et al, 2014;Perry et al, 2016); D. pseudoobscura; (Crudgington et al, 2005); D. serrata; (Chenoweth et al, 2015) , seed beetles (McNamara et al, 2020) and hermaphroditic flatworms (Janicke et al, 2016). Though aspects of the treatments differ amongst such experiments, some common patterns have emerged.…”

Section: Introductionmentioning

confidence: 99%

Experimental evolution supports signatures of sexual selection in genomic divergence

Wiberg

Veltsos

Snook

et al. 2020

Preprint

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Comparative genomics has contributed to the growing evidence that sexual selection is an important component of evolutionary divergence and speciation. Divergence by sexual selection is implicated in faster rates of divergence of the X chromosome and of genes thought to underlie sexually selected traits, including genes that are sex-biased in expression. However, accurately inferring the relative importance of complex and interacting forms of natural selection, demography and neutral processes which occurred in the evolutionary past is challenging. Experimental evolution provides an opportunity to apply controlled treatments for multiple generations and examine the consequences for genomic divergence. Here we altered sexual selection intensity, elevating sexual selection in polyandrous lines and eliminating it in monogamous lines, and examined patterns of divergence in the genome of Drosophila pseudoobscura after more than 160 generations of experimental evolution. Divergence is not uniform across the genome but concentrated in "islands", many of which contain candidate genes implicated in mating behaviours and other sexually selected phenotypes. These are more often seen on the X chromosome, which overall shows divergence above neutral expectations. There are also characteristic signatures of selection seen in these regions, with lower diversity and greater Fst on the X chromosome than the autosomes, and differences in diversity on the autosomes between selection regimes. Reduced Tajima's D implies that selective sweeps have occurred within the divergent regions, despite considerable recombination. These changes are associated with both differential gene expression between the lines and sex-biased gene expression within the lines. Our results are very similar to those thought to implicate sexual selection in divergence in natural populations, and hence provide experimental confirmation of the likely role of sexual selection in driving such types of genetic divergence, but also illustrate how variable outcomes can be for different genomic regions.

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“…2015]), seed beetles (McNamara et al. 2020), and hermaphroditic flatworms (Janicke et al. 2016).…”

mentioning

confidence: 99%

Experimental evolution supports signatures of sexual selection in genomic divergence

et al. 2021

View full text Add to dashboard Cite

Comparative genomics has contributed to the growing evidence that sexual selection is an important component of evolutionary divergence and speciation. Divergence by sexual selection is implicated in faster rates of divergence of the X chromosome and of genes thought to underlie sexually selected traits, including genes that are sex biased in expression. However, accurately inferring the relative importance of complex and interacting forms of natural selection, demography, and neutral processes that occurred in the evolutionary past is challenging. Experimental evolution provides an opportunity to apply controlled treatments for multiple generations and examine the consequent genomic divergence. Here, we altered sexual selection intensity, elevating sexual selection in polyandrous lines and eliminating it in monogamous lines, and examined patterns of allele frequency divergence in the genome of Drosophila pseudoobscura after more than 160 generations of experimental evolution. Divergence is not uniform across the genome but concentrated in “islands,” many of which contain candidate genes implicated in mating behaviors and other sexually selected phenotypes. These are more often seen on the X chromosome, which also shows greater divergence in FST than neutral expectations. There are characteristic signatures of selection seen in these regions, with lower diversity on the X chromosome than the autosomes, and differences in diversity on the autosomes between selection regimes. Reduced Tajima's D within some of the divergent regions may imply that selective sweeps have occurred, despite considerable recombination. These changes are associated with both differential gene expression between the lines and sex‐biased gene expression within the lines. Our results are very similar to those thought to implicate sexual selection in divergence between species and natural populations, and hence provide experimental support for the likely role of sexual selection in driving such types of genetic divergence, but also illustrate how variable outcomes can be for different genomic regions.

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Males evolve to be more harmful under increased sexual conflict intensity in a seed beetle

Cited by 12 publications

References 41 publications

Female‐driven intersexual coevolution in beetle genitalia

Female‐driven intersexual coevolution in beetle genitalia

Experimental evolution supports signatures of sexual selection in genomic divergence

Experimental evolution supports signatures of sexual selection in genomic divergence

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