Selection-driven trait loss in independently evolved cavefish populations

Nature Communications, Год журнала: 2023, Номер 14(1)

Опубликована: Май 3, 2023

Abstract Laboratory studies have demonstrated that a single phenotype can be produced by many different genotypes; however, in natural systems, it is frequently found phenotypic convergence due to parallel genetic changes. This suggests substantial role for constraint and determinism evolution indicates certain mutations are more likely contribute evolution. Here we use whole genome resequencing the Mexican tetra, Astyanax mexicanus , investigate how selection has shaped repeated of both trait loss enhancement across independent cavefish lineages. We show on standing variation de novo substantially adaptation. Our findings provide empirical support hypothesis genes with larger mutational targets substrate indicate features cave environment may impact rate at which occur.

Язык: Английский

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The Role of Hybridization in Species Formation and Persistence

Cold Spring Harbor Perspectives in Biology, Год журнала: 2024, Номер 16(12), С. a041445 - a041445

Опубликована: Март 4, 2024

Joshua V. Peñalba1, Anna Runemark2, Joana I. Meier3,4, Pooja Singh5,6, Guinevere O.U. Wogan7, Rosa Sánchez-Guillén8, James Mallet9, Sina J. Rometsch10,11, Mitra Menon12, Ole Seehausen5,6, Jonna Kulmuni13,14,16 and Ricardo Pereira15,16 1Museum für Naturkunde, Leibniz Institute for Evolution Biodiversity Science, Center Integrative Discovery, 10115 Berlin, Germany 2Department of Biology, Lund University, 22632 Lund, Sweden 3Tree Life, Wellcome Sanger Institute, Hinxton, Cambridgeshire CB10 1SA, United Kingdom 4Department Zoology, University Cambridge, CB2 3EJ, 5Department Aquatic Ecology, Ecology Evolution, Bern, 3012 Switzerland 6Center & Biogeochemistry, Swiss Federal Science Technology (EAWAG), CH-8600 Kastanienbaum, 7Department Oklahoma State Stillwater, 74078, USA 8Red de Biología Evolutiva, INECOL, Xalapa, Veracruz, CP 91073, Mexico 9Organismal Evolutionary Harvard Massachusetts 02138, 10Department Yale New Haven, Connecticut 06511, 11Yale Biospheric Studies, 12Department California Davis, 95616, 13Department Population Ecosystem Dynamics, Amsterdam, 1098 XH The Netherlands 14Organismal Biology Research Programme, Helsinki, Biocenter 3, Finland 15Department Museum Natural History Stuttgart, Stuttgart 70191, Correspondence: ricardojn.pereira{at}gmail.com ↵16 These authors contributed equally to this work.

Язык: Английский

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Evolutionary genomics of oceanic island radiations

Trends in Ecology & Evolution, Год журнала: 2023, Номер 38(7), С. 631 - 642

Опубликована: Март 2, 2023

Язык: Английский

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Island Biogeography

Oxford University Press eBooks, Год журнала: 2023, Номер unknown

Опубликована: Июнь 30, 2023

Abstract Island Biogeography: Geo-environmental Dynamics, Ecology, Evolution, Human Impact, and Conservation provides a synthetic review covering islands as model systems in the life sciences. It is centred on study of geographical distribution biodiversity how it changes through time, understood medium island biotas ecosystems. comprises four parts devoted turn to: environments; ecology; evolution; human impact conservation. describes origins dynamics different types key characteristics environments that shape their biotic characteristics. identifies theories ecology reviews progress towards evaluation development. sets out essential building blocks evolution emergent patterns insular endemism evolutionary syndromes animals plants. geo-environmental are crucial relevance to understanding developing improved explanatory predictive models ecological dynamics. application theory fragmented spread societies across world these subsequent colonization events environments, biotas, sustainability islands. evidence anthropogenic extinction islands, identifying drivers threats existing native species ecosystems, ways which may make particularly vulnerable certain external influences. considers distinctive conservation challenges solutions be effective

Язык: Английский

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Community-wide genome sequencing reveals 30 years of Darwin’s finch evolution

Science, Год журнала: 2023, Номер 381(6665)

Опубликована: Сен. 28, 2023

A fundamental goal in evolutionary biology is to understand the genetic architecture of adaptive traits. Using whole-genome data 3955 Darwin’s finches on Galápagos Island Daphne Major, we identified six loci large effect that explain 45% variation highly heritable beak size Geospiza fortis, a key ecological trait. The major locus supergene comprising four genes. Abrupt changes allele frequencies at accompanied strong change caused by natural selection during drought. gradual scandens occurred across 30 years as result introgressive hybridization with G. fortis . This study shows how few fitness-related trait contribute potential for rapid radiation.

Язык: Английский

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A few essential genetic loci distinguish Penstemon species with flowers adapted to pollination by bees or hummingbirds

PLoS Biology, Год журнала: 2023, Номер 21(9), С. e3002294 - e3002294

Опубликована: Сен. 28, 2023

In the formation of species, adaptation by natural selection generates distinct combinations traits that function well together. The maintenance adaptive trait in face gene flow depends on strength and nature acting underlying genetic loci. Floral pollination syndromes exemplify evolution for particular pollinators. North American wildflower genus Penstemon displays remarkable floral syndrome convergence, with at least 20 separate lineages have evolved from ancestral bee (wide blue-purple flowers present a landing platform bees small amounts nectar) to hummingbird (bright red narrowly tubular offering copious nectar). Related taxa differ offer an attractive opportunity examine genomic basis complex divergence. this study, we characterized divergence among 229 individuals species includes both syndromes. Field plants are easily classified into based phenotypic differences hybrids displaying intermediate rare. Despite unambiguous differences, genome-wide differentiation between is minimal. Hummingbird-adapted populations more genetically similar nearby bee-adapted than geographically distant hummingbird-adapted populations, terms dXY. However, number loci strongly differentiated species. These approximately "species-diagnostic loci," which appear nearly fixed syndromes, sprinkled throughout genome high recombination regions. Several map closely previously established quantitative (QTLs). striking difference diagnostic as whole suggests strong maintain traits, but sufficient homogenize background. A surprisingly alleles confer form identity complex.

Язык: Английский

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Adaptation to seasonal reproduction and environment‐associated factors drive temporal and spatial differentiation in northwest Atlantic herring despite gene flow

Evolutionary Applications, Год журнала: 2024, Номер 17(3)

Опубликована: Март 1, 2024

Understanding how marine organisms adapt to local environments is crucial for predicting populations will respond global climate change. The genomic basis, environmental factors and evolutionary processes involved in adaptation are however not well understood. Here we use Atlantic herring, an abundant, migratory widely distributed fish with substantial resources, as a model organism evaluate adaptation. We examined variation its correlation variables across broad gradient, 15 spawning aggregations Canada the United States. then compared our results available data of northeast populations. confirmed that population structure lies fraction genome including likely adaptive genetic variants functional importance. discovered 10 highly differentiated regions four chromosomes. Nine show strong association seasonal reproduction. One region, corresponding known inversion on chromosome 12, underlies latitudinal pattern discriminating north south biogeographic transition zone Scotian Shelf. Genome-environment associations indicate winter seawater temperature best correlates this inversion. at two so-called 'islands divergence' related reproduction appear be private northwest Atlantic. Populations share these divergent regions, simultaneously displaying significant diversity haplotype composition another which includes undescribed structural variant approximately 7.7 Mb long 8. Our suggest timing geographic location early development may under diverse selective pressures allelic fitness environments. study highlights role architecture, ancestral haplotypes selection maintaining divergence species large sizes presumably high gene flow.

Язык: Английский

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Introgression dynamics of sex-linked chromosomal inversions shape the Malawi cichlid adaptive radiation

bioRxiv (Cold Spring Harbor Laboratory), Год журнала: 2024, Номер unknown

Опубликована: Июль 29, 2024

Abstract Chromosomal inversions contribute to adaptive speciation by linking co-adapted alleles. Querying 1,375 genomes of the species-rich Malawi cichlid fish radiation, we discovered five large segregating in benthic subradiation that each suppress recombination over more than half a chromosome. Two were transferred from deepwater pelagic Diplotaxodon via admixture, while others established early deep clade. Introgression haplotypes lineages inside and outside radiation coincided with bursts species diversification. Inversions show evidence for transient sex linkage striking excess protein changing substitutions points towards selection on neuro-sensory, physiological reproductive genes. We conclude repeated interplay between depth adaptation sex-specific has been central evolution this iconic system.

Язык: Английский

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From microcosm to macrocosm: adaptive radiation of Darwin’s finches

Evolutionary Journal of the Linnean Society, Год журнала: 2024, Номер 3(1)

Опубликована: Янв. 1, 2024

Abstract In this Perspective we show the value of studying living organisms in field to understand their history. Darwin’s finches are an iconic example early stages speciation a young adaptive radiation that produced 18 species little more than million years. The question they pose is how and why so many originated diversified rapidly. A long-term study four on small island Daphne Major, combined with genomic investigations, provide some answers terms extrinsic intrinsic factors. Beak size shape, as well body size, key heritable features involved both ecological reproductive isolation, evolution by natural selection was caused competitor during prolonged droughts. Introgressive hybridization related rare but recurring, apparently widespread, increases genetic variation, does not incur fitness cost. Hybridization can produce new species. We use phylogeny based whole genome sequences infer morphological transitions radiation. Several lines evidence indicate missing from phase due extinction. Combining these results, re-cast classical allopatry-then-sympatry theory competition-selection-hybridization process generates diversity

Язык: Английский

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The genomics of adaptation in birds

Current Biology, Год журнала: 2022, Номер 32(20), С. R1173 - R1186

Опубликована: Окт. 1, 2022

Язык: Английский

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