Imprinting sets the stage for speciation

Nature, Journal Year: 2019, Volume and Issue: 574(7776), P. 99 - 102

Published: Oct. 2, 2019

Language: Английский

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Genomic takeover by transposable elements in the Strawberry poison frog

Molecular Biology and Evolution, Journal Year: 2014, Volume and Issue: unknown

Published: Sept. 25, 2014

We sequenced the genome of strawberry poison frog, Oophaga pumilio, at a depth 127.5× using variable insert size libraries. The total is estimated to be 6.76 Gb, which 4.76 Gb are from high copy number repetitive elements with low differentiation across copies. These repeats encompass DNA transposons, RNA and LTR retrotransposons, including least 0.4 1.0 Mariner/Tc1 Gypsy elements, respectively. Expression data indicate levels gypsy expression in ova O. pumilio compared Xenopus laevis. further observe phylogenetic evidence for horizontal transfer (HT) Mariner possibly between fish frogs. affected by HT present highly expressed, suggesting ongoing proliferation after HT. Our results suggest that large amphibian sizes, partially, can explained process repeated invasion new transposable not yet suppressed germline. also find changes spliceosome we hypothesize related permissiveness increases intron length due transposon proliferation. Finally, identify complement ion channels first genomic frog discuss its relation evolution autoresistance toxins sequestered skin.

Language: Английский

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Sex chromosomes as supergenes of speciation: why amphibians defy the rules?

Philosophical Transactions of the Royal Society B Biological Sciences, Journal Year: 2022, Volume and Issue: 377(1856)

Published: June 13, 2022

As reflected by the two rules of speciation (Haldane's rule and large X-/Z-effect), sex chromosomes are expected to behave like supergenes speciation: they recombine only in one (XX females or ZZ males), supposedly recruit sexually antagonistic genes evolve faster than autosomes, which can all contribute pre-zygotic post-zygotic isolation. While this has been mainly studied organisms with conserved sex-determining systems highly differentiated (heteromorphic) mammals, birds some insects, these expectations less clear organismal groups where repeatedly change remain mostly homomorphic, amphibians. In article, we review proposed roles sex-linked isolating nascent lineages throughout continuum discuss their support amphibians given current knowledge chromosome evolution modes. Given frequent recombination lack differentiation, argue that amphibian not become speciation, is rarity empirical studies consistent a ‘large effect’ frogs toads. The diversity high potential disentangle evolutionary mechanisms responsible for emergence other organisms. This article part theme issue ‘Genomic architecture supergenes: causes consequences’.

Language: Английский

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Selection on Visual Opsin Genes in Diurnal Neotropical Frogs and Loss of the SWS2 Opsin in Poison Frogs

Molecular Biology and Evolution, Journal Year: 2023, Volume and Issue: 40(10)

Published: Sept. 28, 2023

Abstract Amphibians are ideal for studying visual system evolution because their biphasic (aquatic and terrestrial) life history ecological diversity expose them to a broad range of conditions. Here, we evaluate signatures selection on opsin genes across Neotropical anurans focus three diurnal clades that well-known the concurrence conspicuous colors chemical defense (i.e., aposematism): poison frogs (Dendrobatidae), Harlequin toads (Bufonidae: Atelopus), pumpkin toadlets (Brachycephalidae: Brachycephalus). We found evidence positive 44 amino acid sites in LWS, SWS1, SWS2, RH1 genes, which one LWS two have been previously identified as spectral tuning other vertebrates. Given mostly nocturnal habits, patterns revealed new might be important frogs, potentially adaptation habits color-based intraspecific communication. Furthermore, provide normally expressed rod cells some salamanders, has likely lost ancestor Dendrobatidae, suggesting under low-light levels, dendrobatids inferior wavelength discrimination compared frogs. This loss follow origin activity could implications behavior. Our analyses show assessments diversification taxa expand our understanding role sensory adaptation.

Language: Английский

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Multimodal Aposematic Signals and Their Emerging Role in Mate Attraction

Frontiers in Ecology and Evolution, Journal Year: 2018, Volume and Issue: 6

Published: July 3, 2018

Chemically defended animals often display conspicuous colour patterns that predators learn to associate with their unprofitability and subsequently avoid. Such (i.e. aposematic), deter by stimulating visual chemical sensory channels. Hence, aposematism is considered be 'multimodal'. The evolution of warning signals (and a lesser degree accompanying defences) fundamentally linked natural selection predators. Lately, however, increasing evidence also points role sexual shaping signal evolution. One the species in which this has been shown wood tiger moth, Arctia plantaginis, we here put forward as promising model investigate multimodality aposematic signalling. A. plantaginis an diurnal moth exhibits sexually dimorphic colouration well sex-limited polymorphism part its range. anti-predator function and, more recently, defences (even when experimentally decoupled from signals) have well-demonstrated. Interestingly, recent studies revealed differences between two male morphs mating success, suggesting mate choice or attraction, providing possible explanation for dimorphism colouration. Here, we: (1) review lines showing predation pressure multimodal general, particular; (2) establish gaps current research linking selective pressures on reviewing sample literature published last 30 years; (3) highlight need identifying suitable systems address simultaneously effect signals; (4) propose directions future test how can evolve under selection.

Language: Английский

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The birth of aposematism: High phenotypic divergence and low genetic diversity in a young clade of poison frogs

Molecular Phylogenetics and Evolution, Journal Year: 2017, Volume and Issue: 109, P. 283 - 295

Published: Jan. 13, 2017

Language: Английский

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Unlike a virgin: a meta-analytical review of female mating status in studies of female mate choice

Behavioral Ecology, Journal Year: 2022, Volume and Issue: 34(2), P. 165 - 182

Published: Dec. 3, 2022

Abstract Studies of female mate choice commonly use virgin females as test subjects, either to control for the effects mating or because are presumed be more responsive cues. Theory predicts that will less choosy they risk dying without mating. Moreover, in many species, spend their lives mated than virgins. Thus, exclusive studies may underestimate strength direction and fail reflect natural decisions. We conducted a systematic meta-analysis focusing on three scenarios which might differ females: reproductive isolation, inbreeding avoidance, sexually transmitted disease. Using only was common (53% 303 studies). In addition, 38% lacked information history. Contrary predictions, we found no evidence were females. Nevertheless, excluding from leaves an important gap our understanding role preferences evolution. therefore encourage future consider context include subjects when relevant.

Language: Английский

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The ability to sequester the alkaloid epibatidine is widespread among dendrobatid poison frogs

Evolutionary Ecology, Journal Year: 2023, Volume and Issue: 38(5), P. 711 - 725

Published: Sept. 27, 2023

Language: Английский

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Body stiffness is a mechanical property that facilitates contact-mediated mate recognition in Caenorhabditis elegans

Current Biology, Journal Year: 2023, Volume and Issue: 33(17), P. 3585 - 3596.e5

Published: Aug. 3, 2023

Language: Английский

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Conspecific olfactory preferences and interspecific divergence in odor cues in a chickadee hybrid zone

Ecology and Evolution, Journal Year: 2019, Volume and Issue: 9(17), P. 9671 - 9683

Published: Aug. 1, 2019

Abstract Understanding how mating cues promote reproductive isolation upon secondary contact is important in describing the speciation process animals. Divergent chemical have been shown to act across many animal taxa. However, such overlooked avian speciation, particularly passerines, favor of more traditional signals as song and plumage. Here, we aim test potential for odor a mate choice cue, therefore contribute premating between black‐capped ( Poecile atricapillus ) Carolina chickadee P. carolinensis eastern Pennsylvania hybrid zone populations. Using gas chromatography–mass spectrometry, document significant species differences uropygial gland oil chemistry, especially ratio ester nonester compounds. We also show preferences conspecific over heterospecific wild chickadees using Y‐maze design. Our results suggest that may be an but cue these chickadees, potentially promoting isolation. further discuss several promising avenues future research songbird olfactory communication speciation.

Language: Английский

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