Evolutionary genomics of oceanic island radiations

Trends in Ecology & Evolution, Journal Year: 2023, Volume and Issue: 38(7), P. 631 - 642

Published: March 2, 2023

Language: Английский

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Understanding natural selection and similarity: Convergent, parallel and repeated evolution

Molecular Ecology, Journal Year: 2023, Volume and Issue: 32(20), P. 5451 - 5462

Published: Sept. 19, 2023

Parallel and convergent evolution offer some of the most compelling evidence for significance natural selection in evolution, as emergence similar adaptive solutions is unlikely to occur by random chance alone. However, these terms are often employed inconsistently, leading misinterpretation confusion, recently proposed definitions have unintentionally diminished emphasis on solutions. Here, I examine various conceptual frameworks related parallel propose a consolidated framework that enhances our comprehension evolutionary patterns. The primary aim this harmonize concepts together with idea similarity. Both involve result environmental challenges. distinction lies ancestral phenotypes. takes place when phenotypes (before selection) lineages similar. Convergent happens distinct selection). Because an ancestral-based will inevitably lead cases where uncertainty may arise, includes general term, repeated which can be used term applying genotypes well responses pressures. Based argument genetic similarity frequently arise without selection, posits sequences not great interest unless linked actions or origins (mutation, standing variation, gene flow) locations sequences.Os casos de evolução paralela e convergente apresentam-se como provas convincentes da relevância selecção no processo evolutivo, já que é improvável soluções adaptativas semelhantes evoluam apenas por acaso. No entanto, estes dois termos são utilizados frequentemente forma inconsistente definições recentemente propostas diminuíram involuntariamente ênfase na semelhantes. Nesta contribuição, examino os quadros conceptuais relacionadas com proponho um quadro consolidado aumenta compreensão destes padrões evolutivos. O objectivo desta contribuição harmonizar conceitos juntamente similaridade. Ambos implicam resultado pressões evolutivas. A distinção reside nos fenótipos ancestrais: ocorre quando ancestrais (antes selecção) das linhagens eram acontece tinham distintos selecção). Dado uma baseada ancestralidade caracteres levará, inevitavelmente, em incerteza pode surgir, sugiro inclusão termo geral: repetida, ser aplicado à genótipos semelhantes, assim respostas ambientais. Com base argumentação similaridade genética surgir sem selecção, eu postulo similitude sequências genéticas não grande interesse, menos esteja relacionada às ações ou origens (mutação, variação existente, fluxo génico) localizações semelhantes.La evolución y ofrecen algunas las pruebas más contundentes la importancia selección en evolución, ya es improbable emergencia soluciones similares se produzca únicamente casualidad. Sin embargo, estos términos emplean menudo inconsistente, lo lugar interpretaciones erróneas confusión. Además, definiciones recientemente propuestas han restado importancia, involuntariamente, similares. En este artículo, diversos marcos conceptuales con convergente, propongo un marco mejora nuestra comprensión patrones El objetivo principal armonizar los conceptos similitud. implican presiones La distinción radica fenotipos ancestrales: ocurre cuando ancestrales selección) linajes eran produce lijanes tenían selección). una basada ancestralidad conducirá inevitablemente puede incertidumbre distinción, el incluye término general: utilizarse laxo aplicable genotipos similares, así respuestas ambientales. Basándose argumento similitud frecuentemente sin selección, postula secuencias gran interés esté vinculada acciones o orígenes (mutación, variación flujo genético) ubicaciones

Language: Английский

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Population genomics of Gymnogeophagus labiatus and G. lacustris reinforces the role of hydrographic isolation between evolutionary lineages (Cichlidae: Geophagini)

Neotropical Ichthyology, Journal Year: 2025, Volume and Issue: 23(1)

Published: Jan. 1, 2025

Abstract Gymnogeophaguslabiatus and G. lacustris represent a pair of sister taxa distributed in the Patos Lagoon (ELP) Tramandaí-Mampituba (ETM) ecoregions Southern Brazil Uruguay. While was traditionally considered endemic to ETM, labiatus has been assigned both ecoregions, being distinguished from by its hypertrophied lips, which an adaptation for foraging rocky environments, variation coloration. A recent study using mtDNA morphological data challenged this interpretation suggested that is exclusive ELP, all individuals ETM should be lacustris. In work we used genome-wide ddRADseq markers evaluate evolutionary relationships between these species. The results corroborated early findings each ecoregion harbors independent lineage, correspond Our do not show significant genetic structure riverine lacustrine populations ETM. However, found evidence secondary contact population lacustris, suggesting lips groups may have common background, indicate instance adaptive introgression.

Language: Английский

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Genome-wide species delimitation analyses of a silverside fish species complex in central Mexico indicate taxonomic over-splitting

BMC Ecology and Evolution, Journal Year: 2022, Volume and Issue: 22(1)

Published: Sept. 14, 2022

Delimiting species across a speciation continuum is complex task, as the process of origin not generally instantaneous. The use genome-wide data provides unprecedented resolution to address convoluted delimitation cases, often unraveling cryptic diversity. However, because approaches based on multispecies coalescent model are known confound population structure with boundaries, resulting in taxonomic over-splitting, it has become increasingly evident that research must consider multiple lines evidence. In this study, we used phylogenomic, genomic, and coalescent-based approaches, examined those light morphological ecological information, investigate numbers boundaries comprising Chirostoma "humboltianum group" (family Atherinidae). humboltianum group taxonomically controversial where previous mitochondrial studies produced conflicting outcomes. We generated ddRADseq for 77 individuals representing nine nominal group, spanning their distribution range central Mexican plateau.Our results conflict morphospecies hypotheses, identifying four independently evolving lineages organized three geographically cohesive clades: (i) chapalae sphyraena groups Lake Chapala, (ii) estor Lakes Pátzcuaro Zirahuén, (iii) sensu stricto Zacapu Lerma river system.Overall, our study an atypical example analyses delineate fewer than previously recognized basis morphology. It also highlights influence geological history Chapala-Lerma hydrological system driving allopatric group.

Language: Английский

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Multiple paths toward repeated phenotypic evolution in the spiny‐leg adaptive radiation (Tetragnatha; Hawai'i)

Molecular Ecology, Journal Year: 2023, Volume and Issue: 32(18), P. 4971 - 4985

Published: July 29, 2023

The repeated evolution of phenotypes provides clear evidence for the role natural selection in driving evolutionary change. However, origin can be difficult to disentangle as it arise from a combination factors such gene flow, shared ancestral polymorphisms or mutation. Here, we investigate presence these processes Hawaiian spiny-leg Tetragnatha adaptive radiation, which includes four microhabitat-specialists ecomorphs, with different body pigmentation and size (Green, Large Brown, Maroon, Small Brown). We investigated history this radiation using 76 newly generated low-coverage, whole-genome resequenced samples, along phylogenetic population genomic tools. Considering Green ecomorph state, our results suggest that likely re-evolved once, Brown Maroon ecomorphs evolved twice three times. found involved hybridization events, while through novel mutations, despite high rate incomplete lineage sorting dataset. Our findings demonstrate is influenced by multiple processes.

Language: Английский

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Speciation and repeated origins of hypertrophied lips in parallel adaptive radiations of cyprinid fish from East Africa

Ecology and Evolution, Journal Year: 2023, Volume and Issue: 13(9)

Published: Sept. 1, 2023

The evolution of convergent phenotypes is one the most interesting phenomena repeated adaptive radiations. Here, we examined patterns thick-lipped or "rubberlip" phenotype cyprinid fish genus

Language: Английский

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Divergent and non-parallel evolution of MHC IIB in the Neotropical Midas cichlid species complex

BMC Ecology and Evolution, Journal Year: 2022, Volume and Issue: 22(1)

Published: April 1, 2022

Ecological diversification is the result of divergent natural selection by contrasting habitat characteristics that favours evolution distinct phenotypes. This process can happen in sympatry and allopatry. Habitat-specific parasite communities have potential to drive among host populations imposing selective pressures on their host's immune system. In particular, hyperdiverse genes major histocompatibility complex (MHC) are implicated parasite-mediated divergence. Here, we studied extent divergence at MHC, discuss how it may contributed Nicaraguan Midas cichlid species diversification, one most convincing examples rapid sympatric parallel speciation.We genotyped MHC IIB for individuals from six assemblages, each containing adapted exploit similar habitats. We recovered large allelic functional diversity within complex. While alleles were rare, groups (supertypes) common, suggesting they key survival maintained during colonization subsequent radiations. identified lake-specific habitat-specific signatures both diversity, but no clear pattern ecomorphologically phenotypes.Colonization demographic effects fish could conjunction with pressures, such as parasites associated alternative preys or environmental features. Additional ecological data will help evaluating role host-parasite interactions radiations aid elucidating non-parallel features differentiating crater lake assemblages.

Language: Английский

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Signatures of convergence in Neotropical cichlid fish

Molecular Ecology, Journal Year: 2024, Volume and Issue: 33(19)

Published: Sept. 16, 2024

Abstract Convergent evolution of similar phenotypes suggests some predictability in the evolutionary trajectories organisms, due to strong and repeated selective pressures, and/or developmental constraints. In adaptive radiations, particularly cichlid fish convergent are commonly found within across geographical settings. Cichlids show major axes morphological diversification. Recurrent changes body patterns reveal adaption alternative habitats, modifications trophic apparatus respond exploitation different food resources. Here we compare morphologically genetically two Neotropical assemblages, Mexican desert Nicaraguan Midas cichlid, with polymorphic adaptations despite their independent evolution. We a common axis differentiation structures both but shape, defining limnetic patterns. Adaptation habitats implied regulation immune functions while morphogenesis metabolic cichlid. phenotypic adaptions could be associated divergent gene regulation.

Language: Английский

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Exploring phenotypic diversity: a comparative analysis of cichlid convergence

bioRxiv (Cold Spring Harbor Laboratory), Journal Year: 2024, Volume and Issue: unknown

Published: Jan. 25, 2024

Convergent evolution of similar phenotypes suggests some predictability in the evolutionary trajectories organisms, due to strong and repeated selective pressures, and/or developmental constraints. In adaptive radiations, particularly cichlid fish convergent are commonly found within across geographical settings. There main axes morphological diversification. Recurrent changes body patterns reveal adaption alternative habitats, modifications trophic apparatus respond exploitation different food resources. Here we compare two Neotropical assemblages, Mexican desert cichlid, Nicaraguan Midas with polymorphic despite their independent evaluate gene expression convergence divergence. We a single axis differentiation pharyngeal jaws equivalent papilliform molariform morphotypes both radiations. contrast, shape body, defining limnetic patterns. Genetic differences between seem be specific each radiation, no clear convergence.

Language: Английский

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The ability of teleost fishes to recognize individual faces suggests an early evolutionary origin in vertebrates

Frontiers in Psychology, Journal Year: 2024, Volume and Issue: 15

Published: Nov. 27, 2024

The face is the most important area on human body for visually differentiating between individuals. When encountering another person, humans initially gaze at and perceive holistically, utilizing

Language: Английский

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