What is reproductive isolation?

Journal of Evolutionary Biology, Год журнала: 2022, Номер 35(9), С. 1143 - 1164

Опубликована: Сен. 1, 2022

Abstract Reproductive isolation (RI) is a core concept in evolutionary biology. It has been the central focus of speciation research since modern synthesis and basis by which biological species are defined. Despite this, term used seemingly different ways, attempts to quantify RI have very approaches. After showing that field lacks clear definition term, we attempt clarify key issues, including what is, how it can be quantified principle, measured practice. Following other definitions with genetic focus, propose quantitative measure effect differences between populations on gene flow. Specifically, compares flow neutral alleles presence these without any such differences. thus greater than zero when reduce populations. We show range scenarios. A conclusion depends strongly circumstances—including spatial, temporal genomic context—making difficult compare across systems. reviewing methods for estimating from data, conclude discuss our findings light goals encourage use integrate organismal biology ways efforts data vastly In this paper, issues about RI,

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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Demographically explicit scans for barriers to gene flow using gIMble

PLoS Genetics, Год журнала: 2023, Номер 19(10), С. e1010999 - e1010999

Опубликована: Окт. 10, 2023

Identifying regions of the genome that act as barriers to gene flow between recently diverged taxa has remained challenging given many evolutionary forces generate variation in genetic diversity and divergence along genome, stochastic nature this variation. Progress been impeded by a conceptual methodological divide analyses infer demographic history speciation scans aimed at identifying locally maladaptive alleles i.e. genomic flow. Here we implement genomewide IM blockwise likelihood estimation (gIMble), composite approach for quantification barriers, bridges divide. This analytic framework captures background selection against model isolation with migration (IM) heterogeneity effective population size (Ne) rate (me), respectively. Variation both parameters is estimated sliding windows via pre-computed grids. gIMble includes modules pre-processing/filtering data performing parametric bootstraps using coalescent simulations. To demonstrate new approach, analyse from well-studied pair sister species tropical butterflies known post-divergence flow: Heliconius melpomene H. cydno. Our uncover large-effect barrier loci (including well-known wing-pattern genes) genome-wide signal polygenic architecture.

Язык: Английский

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Coupling of Barriers to Gene Exchange: Causes and Consequences

Cold Spring Harbor Perspectives in Biology, Год журнала: 2024, Номер 16(8), С. a041432 - a041432

Опубликована: Янв. 8, 2024

Erik B. Dopman1, Kerry L. Shaw2, Maria R. Servedio3, Roger K. Butlin4,5 and Carole M. Smadja6 1Department of Biology, Tufts University, Medford, Massachusetts 02155, USA 2Department Neurobiology Behavior, Cornell Ithaca, New York 14853, 3Department University North Carolina, Chapel Hill, Carolina 27599, 4Ecology Evolutionary School Biosciences, The Sheffield, Western Bank, Sheffield S10 2TN, United Kingdom 5Department Marine Sciences, Gothenburg, Gothenburg 40530, Sweden 6Institut des Sciences de l'Evolution Montpellier ISEM, Universite Montpellier, CNRS, IRD, 34095, France Correspondence: erik.dopman{at}tufts.edu

Язык: Английский

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Phylogenetic Insights into Diversification

Annual Review of Ecology Evolution and Systematics, Год журнала: 2024, Номер 55(1), С. 1 - 21

Опубликована: Июнь 17, 2024

Species diversification—the balance between speciation and extinction—is fundamental to our understanding of how species richness varies in space time throughout the Tree Life. Phylogenetic approaches provide insights into diversification by enabling support for alternative scenarios be compared extinction rates estimated. Here, we review current toolkit available conducting such analyses. We first highlight modeling efforts over past decade have fostered a notable transition from overly simplistic evolutionary more nuanced why vary through across lineages. Using latitudinal diversity gradient as case study, then illustrate impact that choices can on results obtained. Finally, recent progress two areas are still lagging behind: phylogenetic microbial process.

Язык: Английский

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Divergence and gene flow history at two large chromosomal inversions underlying ecotype differentiation in the long‐snouted seahorse

Molecular Ecology, Год журнала: 2024, Номер 33(24)

Опубликована: Янв. 27, 2024

Abstract Chromosomal inversions can play an important role in divergence and reproductive isolation by building maintaining distinct allelic combinations between evolutionary lineages. Alternatively, they take the form of balanced polymorphisms that segregate within populations until one arrangement becomes fixed. Many questions remain about how inversion arise, are maintained over long term, ultimately, whether contribute to speciation. The long‐snouted seahorse ( Hippocampus guttulatus ) is genetically subdivided into geographic lineages marine‐lagoon ecotypes, with shared structural variation underlying lineage ecotype divergence. Here, we aim characterize variants reconstruct their history suspected formation. We generated a near chromosome‐level genome assembly described genome‐wide patterns diversity through analysis 112 whole‐genome sequences from Atlantic, Mediterranean, Black Sea populations. By also analysing linked‐read sequencing data, found evidence for two chromosomal were several megabases length showed contrasting allele frequency ecotypes across species range. reveal these represent ancient intraspecific polymorphisms, likely being divergent selection other pseudo‐overdominance. A possible selective coupling was further supported absence specific haplotype putative functional interaction reproduction. Lastly, detected gene flux eroding inverted alleles at varying levels inversions, impact on dynamics contribution

Язык: Английский

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Exploring coral speciation: Multiple sympatric Stylophora pistillata taxa along a divergence continuum on the Great Barrier Reef

Evolutionary Applications, Год журнала: 2024, Номер 17(1)

Опубликована: Янв. 1, 2024

Abstract Understanding how biodiversity originates and is maintained are fundamental challenge in evolutionary biology. Speciation a continuous process progression along this continuum depends on the interplay between forces driving divergence promoting genetic homogenisation. Coral reefs broadly connected yet highly heterogeneous ecosystems, with gene flow at small spatial scales might therefore be common. Genomic studies increasingly revealing existence of closely related sympatric taxa within taxonomic coral species, but extent to which these still exchanging genes sharing environmental niches unclear. In study, we sampled extensively across diverse habitats multiple Great Barrier Reef (GBR) comprehensively examined genome‐wide diversity histories among Stylophora pistillata species complex. S. one most abundant well‐studied discovered five distinct taxa, wide geographic ranges extensive sympatry. Demographic modelling showed that speciation events have occurred different stages continuum. We found significant correlations specific variables, suggesting niche partitioning may played role differentially adapted environments. Conservation actions rely estimates richness, population sizes ranges, biased if divergent lumped together. As rapidly degrading due climate change, our study highlights importance recognising evolutionarily improve conservation restoration efforts aiming protecting diversity.

Язык: Английский

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Diverse pathways to speciation revealed by marine snails

Trends in Genetics, Год журнала: 2024, Номер 40(4), С. 337 - 351

Опубликована: Фев. 22, 2024

Speciation is a key evolutionary process that not yet fully understood. Combining population genomic and ecological data from multiple diverging pairs of marine snails (Littorina) supports the search for speciation mechanisms. Placing on one-dimensional continuum, undifferentiated populations to species, obscured complexity speciation. Adding axes helped describe either routes or reproductive isolation in snails. Divergent selection repeatedly generated barriers between ecotypes, but appeared less important completing while genetic incompatibilities played role. Chromosomal inversions contributed barriers, with variable impact. A multidimensional (hypercube) approach supported framing questions identification knowledge gaps can be useful understand many other systems.

Язык: Английский

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Integrative taxonomy clarifies the evolution of a cryptic primate clade

Nature Ecology & Evolution, Год журнала: 2024, Номер unknown

Опубликована: Сен. 27, 2024

Abstract Global biodiversity is under accelerating threats, and species are succumbing to extinction before being described. Madagascar’s biota represents an extreme example of this scenario, with the added complication that much its endemic cryptic. Here we illustrate best practices for clarifying cryptic diversification processes by presenting integrative framework leverages multiple lines evidence taxon-informed cut-offs delimitation, while placing special emphasis on identifying patterns isolation distance. We systematically apply entire taxonomically controversial primate clade, mouse lemurs (genus Microcebus , family Cheirogaleidae). demonstrate diversity has been overestimated primarily due interpretation geographic variation as speciation, potentially biasing inference underlying evolutionary diversification. Following a revised classification, find crypsis within genus explained model morphological stasis imposed stabilizing selection neutral process niche Finally, limits defining evolutionarily significant units, provide new conservation priorities, bridging fundamental applied objectives in generalizable framework.

Язык: Английский

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Negative Coupling: The Coincidence of Premating Isolating Barriers Can Reduce Reproductive Isolation

Cold Spring Harbor Perspectives in Biology, Год журнала: 2024, Номер 16(10), С. a041435 - a041435

Опубликована: Март 19, 2024

Thomas G. Aubier1,2, Michael Kopp3, Isaac J. Linn2, Oscar Puebla4,5, Marina Rafajlović6,7 and Maria R. Servedio2 1Centre de Recherche sur la Biodiversité et l'Environnement (CRBE), Université Toulouse, CNRS, IRD, Toulouse INP, 3 – Paul Sabatier (UT3), France 2Department of Biology, University North Carolina at Chapel Hill, 27599, USA 3Aix Marseille Université, Centrale Marseille, I2M, UMR 7373, 13331 Cedex 3, 4Leibniz Centre for Tropical Marine Research, 28359 Bremen, Germany 5Institute Chemistry Biology the Environment (ICBM), 26111 Oldenburg, 6Department Sciences, Gothenburg, 405 30 Sweden 7Linnaeus Evolutionary 453 96 Strömstad, Correspondence: thomas.aubier{at}normalesup.org

Язык: Английский

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