Phylogenomic analysis sheds light on the evolutionary pathways towards acoustic communication in Orthoptera

Nature Communications, Journal Year: 2020, Volume and Issue: 11(1)

Published: Oct. 2, 2020

Abstract Acoustic communication is enabled by the evolution of specialised hearing and sound producing organs. In this study, we performed a large-scale macroevolutionary study to understand how both production evolved affected diversification in insect order Orthoptera, which includes many familiar singing insects, such as crickets, katydids, grasshoppers. Using phylogenomic data, firmly establish phylogenetic relationships among major lineages divergence time estimates within well lineage-specific dynamic patterns for suborder Ensifera, infer that forewing-based stridulation tibial tympanal ears co-evolved, but Caelifera, abdominal first non-sexual context, later co-opted sexual signalling when organs evolved. However, find little evidence increased rates those with known acoustic communication.

Language: Английский

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Rapid adaptation in a fast‐changing world: Emerging insights from insect genomics

Global Change Biology, Journal Year: 2022, Volume and Issue: 29(4), P. 943 - 954

Published: Nov. 5, 2022

Many researchers have questioned the ability of biota to adapt rapid anthropogenic environmental shifts. Here, we synthesize emerging genomic evidence for insect evolution in response human pressure. These new data reveal diverse mechanisms (single locus, polygenic, structural shifts; introgression) underpinning adaptive responses a variety selective pressures. While effects some impacts (e.g. pollution; pesticides) been previously documented, here highlight startling evolutionary additional processes such as deforestation. recent findings indicate that assemblages can indeed respond dynamically major challenges. Our synthesis also emphasizes critical roles architecture, standing variation and gene flow maintaining future potential. Broadly, it is clear approaches are essential predicting, monitoring responding ongoing biodiversity shifts fast-changing world.

Language: Английский

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The grasshopper genome reveals long-term gene content conservation of the X Chromosome and temporal variation in X Chromosome evolution

Genome Research, Journal Year: 2024, Volume and Issue: 34(7), P. 997 - 1007

Published: July 1, 2024

We present the first chromosome-level genome assembly of grasshopper, Locusta migratoria , one largest insect genomes. use coverage differences between females (XX) and males (X0) to identify X Chromosome gene content, find that shows both complete dosage compensation in somatic tissues an underrepresentation testis-expressed genes. X-linked content from L. is highly conserved across seven orders, namely Orthoptera, Odonata, Phasmatodea, Hemiptera, Neuroptera, Coleoptera, Diptera, 800 Mb grasshopper homologous fly ancestral despite 400 million years divergence, suggesting either repeated origin sex chromosomes with similar or long-term conservation Chromosome. this broad test for temporal dynamics Fast-X evolution, evidence a recent burst evolution new genes contrast slow X-conserved

Language: Английский

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Rapid parallel adaptation despite gene flow in silent crickets

Nature Communications, Journal Year: 2021, Volume and Issue: 12(1)

Published: Jan. 4, 2021

Abstract Gene flow is predicted to impede parallel adaptation via de novo mutation, because it can introduce pre-existing adaptive alleles from population population. We test this using Hawaiian crickets ( Teleogryllus oceanicus ) in which ‘flatwing’ males that lack sound-producing wing structures recently arose and spread under selection an acoustically-orienting parasitoid. Morphometric genetic comparisons identify distinct flatwing phenotypes populations on three islands, localized different loci. Nevertheless, we detect strong, recent ongoing gene among the populations. Using genome scans expression analysis find evolution of islands associated with shared genomic hotspots contain doublesex , but form differs corresponds known demographics wild. thus show how occur contemporary timescales despite flow, indicating could be less constrained than previously appreciated.

Language: Английский

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Responses of intended and unintended receivers to a novel sexual signal suggest clandestine communication

Nature Communications, Journal Year: 2021, Volume and Issue: 12(1)

Published: Feb. 4, 2021

Abstract Inadvertent cues can be refined into signals through coevolution between signalers and receivers, yet the earliest steps in this process remain elusive. In Hawaiian populations of Pacific field cricket, a new morph producing novel incredibly variable song (purring) has spread across islands. Here we characterize current sexual natural selection landscape acting on signal by (1) determining fitness advantages purring attraction to mates protection from prominent deadly enemy, (2) testing alternative hypotheses about strength form signal. studies, female crickets respond positively purrs, but eavesdropping parasitoid flies do not, suggesting may allow private communication among crickets. Contrary sensory bias preference for novelty hypotheses, functions (selective pressure) are nearly flat, driven extreme inter-individual variation function shape. Our study offers rare empirical test roles stages evolution.

Language: Английский

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Temporal genomics in Hawaiian crickets reveals compensatory intragenomic coadaptation during adaptive evolution

Nature Communications, Journal Year: 2024, Volume and Issue: 15(1)

Published: June 12, 2024

Abstract Theory predicts that compensatory genetic changes reduce negative indirect effects of selected variants during adaptive evolution, but evidence is scarce. Here, we test this in a wild population Hawaiian crickets using temporal genomics and high-quality chromosome-level cricket genome. In population, mutation, flatwing , silences males rapidly spread due to an acoustically-orienting parasitoid. Our sampling spanned social transition which fixed the went silent. We find long-range linkage disequilibrium around putative locus was maintained over time, hitchhiking genes had functions related -associated effects. develop combinatorial enrichment approach transcriptome data for compensatory, intragenomic coevolution. Temporal genomic selection were distributed genome-wide functionally associated with population’s silence, particularly behavioural responses silent environments. results demonstrate how ‘adaptation begets adaptation’; sociogenetic environment accompanying rapid trait evolution can generate provoking further, adaptation.

Language: Английский

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Chromosome-level genome assembly and population genomics of Robinia pseudoacacia reveal the genetic basis for its wide cultivation

Communications Biology, Journal Year: 2023, Volume and Issue: 6(1)

Published: July 31, 2023

Urban greening provides important ecosystem services and ideal places for urban recreation is a serious consideration municipal decision-makers. Among the tree species cultivated in green spaces, Robinia pseudoacacia stands out due to its attractive flowers, fragrances, high trunks, wide adaptability, essential services. However, genomic basis consequences of wide-planting spaces remains unknown. Here, we report chromosome-level genome assembly R. pseudoacacia, revealing size 682.4 Mb 33,187 protein-coding genes. More than 99.3% anchored 11 chromosomes with an N50 59.9 Mb. Comparative analyses among 17 reveal that gene families related traits favoured by urbanites, such as wood formation, biosynthesis, drought tolerance, are notably expanded pseudoacacia. Our population further recover genes under recent selection. Ultimately, these play roles biological processes flower development, water retention, immunization. Altogether, our results evolutionary forces shape greening. These findings also present valuable foundation future development agronomic molecular breeding strategies

Language: Английский

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DeepLabCut-based daily behavioural and posture analysis in a cricket

Biology Open, Journal Year: 2024, Volume and Issue: 13(4)

Published: March 27, 2024

Circadian rhythms are indispensable intrinsic programs that regulate the daily rhythmicity of physiological processes, such as feeding and sleep. The cricket has been employed a model organism for understanding neural mechanisms underlying circadian in insects. However, previous studies measuring rhythm-controlled behaviours only analysed locomotive activity using seesaw-type infrared sensor-based actometers. Meanwhile, advances deep learning techniques have made it possible to analyse animal behaviour posture software is devoid human bias does not require physical tagging individual animals. Here, we present system can simultaneously quantify multiple crickets - locomotor activity, feeding, sleep-like states long-term, DeepLabCut, supervised machine learning-based body keypoints labelling. Our successfully labelled six parts single with high level confidence produced reliable data showing diurnal behaviours. also enabled estimation by focusing on posture, instead immobility time, which conventional parameter. We anticipate this will provide an opportunity simultaneous automatic prediction facilitating study rhythms.

Language: Английский

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Hawaiian love songs: Coevolutionary conflict between mate attraction and parasite escape

Current Biology, Journal Year: 2025, Volume and Issue: 35(5), P. R189 - R191

Published: March 1, 2025

Language: Английский

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Doublesex regulates male sexual development in the cricket Gryllus bimaculatus

Insect Science, Journal Year: 2025, Volume and Issue: unknown

Published: March 11, 2025

Abstract Insects have evolved a diversity of regulatory mechanisms to determine their sex. Understanding the molecular regulation insect sex determination is great significance in revealing general law and providing potential routes for genetic manipulation pest species. Although cascade doublesex ( dsx ) gene functions been well described some holometabolous insects, little known about this hemimetabolous insects. In study, we identified homolog Gryllus bimaculatus , which belongs Orthoptera order an important model developmental evolutionary biology. We found that Gbdsx has two alternative splicing isoforms (male‐specific M non‐sex‐specific C ). Using RNAi‐mediated knock‐down 6th‐instar nymphs resulted adult male forewings showing feminized vein development abnormal external genitalia. CRISPR/Cas9 knockout embryos males becoming pseudofemales, with internal Additionally, pseudofemales created by demonstrated normal courtship trends aggressive behavior but no actual mating behavior. However, female crickets does not affect sexual traits or fertility. Our results suggest plays critical role cricket traits, behavior, furthers our understanding

Language: Английский

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