A collaborative backbone resource for comparative studies of subterranean evolution: The World Asellidae database

Molecular Ecology Resources, Journal Year: 2023, Volume and Issue: 24(1)

Published: Oct. 21, 2023

Abstract Transition to novel environments, such as groundwater colonization by surface organisms, provides an excellent research ground study phenotypic evolution. However, interspecific comparative studies on evolution life are few because of the challenge in assembling large ecological and molecular resources for species‐rich taxa comprised subterranean species. Here, we make available scientific community operational set working tools Asellidae, a family freshwater isopods containing hundreds First, release World Asellidae database (WAD) its web application, sustainable FAIR solution producing sharing data biological material. WAD access thousands species occurrences, specimens, DNA extracts sequences with rich metadata ensuring full traceability. Second, perform large‐scale dated phylogenetic reconstruction support analyses. Of 424 terminal branches, identify 34 pairs representing independent replicates transition from water groundwater. Third, exemplify usefulness documenting shifts associated habitats. We provide first phylogenetically controlled evidence that body size males decreases relative females upon colonization, suggesting competition rare receptive selects smaller, more agile By making these widely accessible, open up new opportunities exploring how traits evolve response changes selective pressures trade‐offs during colonization.

Language: Английский

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The coding loci of evolution and domestication: current knowledge and implications for bio-inspired genome editing

Journal of Experimental Biology, Journal Year: 2020, Volume and Issue: 223(Suppl_1)

Published: Feb. 1, 2020

ABSTRACT One promising application of CRISPR/Cas9 is to create targeted mutations introduce traits interest into domesticated organisms. However, a major current limitation for crop and livestock improvement identify the precise genes genetic changes that must be engineered obtain interest. Here, we discuss advantages bio-inspired genome editing, i.e. introduction natural have already been associated with in other lineages (breeds, populations or species). To landscape view potential targets used Gephebase (www.gephebase.org), manually curated database compiling published data about responsible evolutionary across eukaryotes, examined >1200 identified coding regions more than 700 animals, plants yeasts. We observe our knowledge relatively important certain traits, such as xenobiotic resistance, poor others. also note protein-null alleles, often owing nonsense frameshift mutations, represent large fraction known loci domestication (42% mutations), compared intraspecific (27%) interspecific evolution (11%). Although this trend may subject detection, publication curation biases, it consistent idea breeders selected large-effect underlying adaptive specific settings, but these phenotypes would not survive vagaries changing external internal environments. Our compilation uncovers interesting options transgene-free editing.

Language: Английский

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Diversity of Olfactory Responses and Skills in Astyanax Mexicanus Cavefish Populations Inhabiting different Caves

Diversity, Journal Year: 2020, Volume and Issue: 12(10), P. 395 - 395

Published: Oct. 13, 2020

Animals in many phyla are adapted to and thrive the constant darkness of subterranean environments. To do so, cave animals have presumably evolved mechano- chemosensory compensations loss vision, as is case for blind characiform cavefish, Astyanax mexicanus. Here, we systematically assessed olfactory capacities cavefish surface fish this species lab well wild, five different caves northeastern Mexico, using an setup specially developed test record responses during fieldwork. Overall showed lower (i.e., better) detection thresholds than fish. However, wild adult from Pachón, Sabinos, Tinaja, Chica Subterráneo highly variable three odorant molecules they were exposed to. Pachón highest capacities, no response odors presented. We discuss these data with regard environmental conditions which populations live. Our experiments natural settings document diversity environments inhabited by a single A. mexicanus, highlight complexity plastic genetic mechanisms that underlie adaptation.

Language: Английский

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Characterizing the genetic basis of trait evolution in the Mexican cavefish

Evolution & Development, Journal Year: 2022, Volume and Issue: 24(5), P. 131 - 144

Published: Aug. 4, 2022

Evolution in response to a change ecology often coincides with various morphological, physiological, and behavioral traits. For most organisms little is known about the genetic functional relationship between evolutionarily derived traits, representing critical gap our understanding of adaptation. The Mexican tetra, Astyanax mexicanus, consists largely independent populations fish that inhabit at least 30 caves Northeast Mexico, surface population, rivers Mexico Southern Texas. recent application molecular approaches combined phenotyping have established A. mexicanus as model for studying evolution complex Cave are interfertile evolved numerous traits including eye degeneration, insomnia, albinism, enhanced mechanosensory function. interfertility different from same species provides unique opportunity define assess co-evolution morphological one another. To relationships we developed pipeline test individual multiple This confirmed differences locomotor activity, prey capture, startle reflex cavefish populations. measure F2 hybrid were characterized behavior, prey-capture reflex, attributes. Analysis revealed an association body length slower escape suggesting trade-off increased size predator avoidance cavefish. Overall, there few associations or changes underlie measured Taken together, this approach novel system identify underpinnings naturally occurring variation

Language: Английский

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The Asellus aquaticus species complex

Elsevier eBooks, Journal Year: 2023, Volume and Issue: unknown, P. 329 - 350

Published: Jan. 1, 2023

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Host-parasite interactions in perpetual darkness: Macroparasite diversity in the cavefish <i>Astyanax mexicanus</i>

动物学研究, Journal Year: 2023, Volume and Issue: 44(4), P. 782 - 792

Published: Jan. 1, 2023

Astyanax mexicanus has repeatedly colonized cave environments, displaying evolutionary parallelisms in many troglobitic traits. Despite being a model system for the study of adaptation to life perpetual darkness, parasites that infect cavefish are practically unknown. In this study, we investigated macroparasite communities 18 populations from independent lineages and compared them with parasite diversity found their sister surface fish populations, aim better understanding role play colonization new environments. Within identified 13 taxa, including subset 10 27 taxa known populations. Parasites infecting belong five taxonomic groups, trematodes, monogeneans, nematodes, copepods, acari. Monogeneans most dominant group, 14 caves. The macroparasites include species direct cycles trophic transmission, invasive species. Surprisingly, paired comparisons indicate higher richness than fish. Spatial variation composition across caves suggests historical geographical contingencies host-parasite process potential evolution local adaptations. This base-line data on A. provides foundation explore divergent infections under contrasting ecological pressures (cave vs. environments) adaptive

Language: Английский

Citations

5

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Convergence on reduced aggression through shared behavioral traits in multiple populations of Astyanax mexicanus

Roberto Rodríguez‐Morales,

Paola Gonzalez-Lerma,

Anders Yuiska

et al.

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

Published: Oct. 14, 2022

Aggression is observed across the animal kingdom, and benefits animals in a number of ways to increase fitness promote survival. While aggressive behaviors vary widely populations can evolve as an adaptation particular environment, complexity presents challenge studying evolution aggression. The Mexican tetra, Astyanax mexicanus exists river-dwelling surface form multiple blind cave form, some which exhibit reduced aggression, providing opportunity investigate how shapes behaviors.

Language: Английский

Citations

8

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Evo-Devo applied to sleep research: an approach whose time has come

Ritchie E. Brown

SLEEP Advances, Journal Year: 2024, Volume and Issue: 5(1)

Published: Jan. 1, 2024

Abstract Sleep occurs in all animals but its amount, form, and timing vary considerably between species individuals. Currently, little is known about the basis for these differences, part, because we lack a complete understanding of brain circuitry controlling sleep–wake states markers cell types which can identify similar circuits across phylogeny. Here, I explain utility an “Evo-devo” approach comparative studies sleep regulation function as well medicine. This focuses on evolutionary ancient transcription factors act master controllers cell-type specification. Studying developmental factor cascades novel clusters control wakefulness, reveal mechanisms differences timing, expression, timepoint evolution when different neurons appeared. Spatial transcriptomic studies, based will greatly aid this approach. Conserved pathways regulate mice, Drosophila, C. elegans. Members LIM Homeobox (Lhx) gene family specification circadian forebrain hypothalamus. Increased Lhx9 activity may account increased orexin/hypocretin reduced Mexican cavefish. Other families specify brainstem, hypothalamus, basal forebrain. The expression allows generation specific transplantation approaches. Furthermore, mutations are linked to variation duration humans, risk restless legs syndrome, sleep-disordered breathing. paper part “Genetic other molecular underpinnings sleep, disorders, rhythms including translational approaches” collection.

Language: Английский

Citations

1

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Natural reversal of cavefish heart asymmetry is controlled by Sonic Hedgehog effects on the left-right organizer

Mandy Ng, Li Ma, Janet Shi

et al.

Development, Journal Year: 2024, Volume and Issue: 151(14)

Published: June 28, 2024

The direction of left-right visceral asymmetry is conserved in vertebrates. Deviations the standard asymmetric pattern are rare, and underlying mechanisms not understood. Here, we use teleost Astyanax mexicanus, consisting surface fish with normal left-oriented heart cavefish high levels reversed right-oriented asymmetry, to explore natural changes determination. We show that Sonic Hedgehog (Shh) signaling increased at posterior midline, Kupffer's vesicle (the organizer) enlarged contains longer cilia, number dorsal forerunner cells cavefish. Furthermore, Shh increase embryos induces resembling phenotype. Asymmetric expression Nodal antagonist Dand5 equalized or cavefish, mimics dand5 asymmetry. decrease reduces level Thus, naturally occurring modifications controlled by effects on organizer function.

Language: Английский

Citations

1

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Parallel phenotypic evolution of two independent cavefish lineages of Astyanax mexicanus (De Filippi, 1854) (Characiformes: Characidae)

Jorge Hernández-Lozano,

Carlos A. Garita‐Alvarado, Roberto Munguía‐Steyer

et al.

Biological Journal of the Linnean Society, Journal Year: 2024, Volume and Issue: unknown

Published: July 11, 2024

Abstract Astyanax mexicanus offers a unique model for studying parallel evolution, with cave-dwelling forms arising from at least two distinct surface lineages. Here, we examined repeated evolution in the cave-adapted lineages across four phenotypic datasets: (i) meristic data; (ii) ecomorphological and geometric morphometric data (iii) head (iv) premaxillary bone shape. Additionally, assessed association of these phenotypes their phylogenetic history. Certain traits exhibited evidence cave ecotype lineages, such as increased maxillary tooth count, reduced lateral line scale shorter ascending process bone. Geometric showed divergence gradient shape between populations, strongest Sierra de El Abra populations less differentiation caves Guatemala Micos. Cave that hybridize (e.g. Micos) displayed greatest overlap ecotype. There was similar shape, but weaker ecotypes. This several emphasizes significance selective pressures exerted by environment on

Language: Английский

Citations

1

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