Balancing selection and the functional effects of shared polymorphism in crypticDaphniaspecies

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

Published: April 20, 2024

Abstract The patterns of genetic variation within and between related taxa represent the history a species. Shared polymorphisms, loci with identical alleles across species, are unique interest as they may cases ancient selection maintaining functional post-speciation. In this study, we investigate abundance shared polymorphism in Daphnia pulex species complex. We test whether mutations consistent action balancing or alternative hypotheses such hybridization, incomplete lineage sorting, convergent evolution. analyzed over 2,000 genomes from North American European D. several outgroup to examine prevalence distribution focal pair, . show that while diverged ten million years ago, retained tens thousands alleles. found number polymorphisms cannot be explained by hybridization sorting alone. Instead, most could product evolution, limited appear old trans-specific is affecting young alike. Finally, provide evidence blue wavelength opsin gene has effects on behavior fitness wild. Ultimately, our findings insights into basis adaptation maintenance diversity

Language: Английский

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Complete mitochondrial genome of the European common barnacle Perforatus perforatus Bruguière, 1789 (balanomorpha: balanidae)

Mitochondrial DNA Part B, Journal Year: 2024, Volume and Issue: 9(6), P. 823 - 827

Published: June 2, 2024

This study is the first to sequence complete mitochondrial genome (mitogenome) of

Language: Английский

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Comparative genomics reveals the dynamic evolutionary history of cement protein genes of barnacles from intertidal to deep‐sea hydrothermal vents

Molecular Ecology Resources, Journal Year: 2023, Volume and Issue: unknown

Published: Nov. 13, 2023

Abstract Thoracican barnacles are a diverse group of marine organisms for which the availability genome assemblies is currently limited. In this study, we sequenced genomes two neolepadoid species ( Ashinkailepas kermadecensis , Imbricaverruca yamaguchii ) from hydrothermal vents, in addition to intertidal species. Genome sizes ranged 481 1054 Mb, with repetitive sequence contents 21.2% 50.7%. Concordance rates orthologs and heterozygosity were between 82.4% 91.7% 1.0% 2.1%, respectively, indicating high genetic diversity heterozygosity. Based on phylogenomic analyses, revised nomenclature cement genes encoding proteins that not homologous any known proteins. The major gene, CP100A was found all thoracican species, including vent‐associated neolepadoids, hypothesised be essential settlement. Duplicated genes, CP100B CP100C only balanids, suggesting potential functional redundancy or acquisition new functions associated calcareous base. An ancestor CP52 duplicated dynamically among lepadids, pollicipedids multiple copies single scaffold, balanids sequential repeats conserved regions, but no providing insights into gene evolution lineages. This study enhances our understanding adhesion mechanisms thoracicans underwater environments. newly provide opportunities studying their ecology, shedding light adaptation environments, contributing knowledge barnacle biology valuable genomic resources further studies field.

Language: Английский

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mtDNA data reveal disparate population structures and High Arctic colonization patterns in three intertidal invertebrates with contrasting life history traits

Frontiers in Marine Science, Journal Year: 2023, Volume and Issue: 10

Published: Dec. 7, 2023

Introduction Post-glacial climate variation is known to have influenced the distribution of marine species in North Atlantic. In particular, Atlantic side Arctic has experienced strong fluctuations both atmospheric and sea surface temperature, as well seasonal ice coverage since last glacial maximum (LGM). Here, we aim unveil phylogeography historical demography three rocky intertidal invertebrates showing a trans-Atlantic presently inhabiting Arctic: Gammarus oceanicus , Littorina saxatilis Semibalanus balanoides . Methods We used large amount mitochondrial DNA barcode data, newly-obtained stored public databases. performed phylogeographic demographic analyses on 1119 G. 205 L. 884 S. sequences. Results Our results show that all these boreal expanded their effective population sizes high Svalbard Archipelago LGM. Analyses investigating origin populations point eastern Discussion Based our conclude expansion possibly happened during an earlier warm cycle Holocene era, probably not result recent ‘Atlantification’ Arctic. also discuss effects dispersal potential structure important aspect comparative biogeographical studies.

Language: Английский

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