Reversal learning of visual cues in Heliconiini butterflies DOI Creative Commons
Fletcher J. Young, Lina Melo‐Flórez, W. Owen McMillan

и другие.

Animal Behaviour, Год журнала: 2023, Номер 208, С. 69 - 77

Опубликована: Дек. 31, 2023

The mushroom bodies, an integrative region of the insect brain involved in learning and memory, have undergone volumetric increase several independent lineages including bees ants, cockroaches some beetles. However, selective pressures driving these expansion events are not fully understood. One promising system for investigating this question is Neotropical butterfly genus Heliconius, which exhibits markedly enlarged bodies compared with other members Heliconiini tribe. Notably, neural elaboration co-occurs evolution trap line foraging behaviour improved capacity complex visual cues long-term memory. Here, we further investigated behavioural consequences by testing reversal ability, a commonly used measure cognition flexibility both vertebrates invertebrates, across three Heliconius closely related species. We trained butterflies to associate food reward either purple or yellow flowers, before training them reversed associations, then reversing again. All six species successfully learned cues, and, contrary our expectations, found no evidence that performed better than These results surprising, given previous linking insects enhanced performance cognitive tests. This serves as reminder functional can be multifaceted do necessarily result overall general but rather specific, ecologically relevant tasks.

Язык: Английский

Enhanced long-term memory and increased mushroom body plasticity in Heliconius butterflies DOI Creative Commons
Fletcher J. Young, Amaia Alcalde Anton, Lina Melo‐Flórez

и другие.

iScience, Год журнала: 2024, Номер 27(2), С. 108949 - 108949

Опубликована: Янв. 21, 2024

butterflies exhibit expanded mushroom bodies, a key brain region for learning and memory in insects, novel foraging strategy unique among Lepidoptera - traplining pollen. We tested visual long-term across six

Язык: Английский

Процитировано

7
Convergent molecular evolution associated with repeated transition to gregarious larval behaviour in Heliconiini DOI Creative Commons
Francesco Cicconardi, Callum F. McLellan, Alice C. Séguret

и другие.

bioRxiv (Cold Spring Harbor Laboratory), Год журнала: 2025, Номер unknown

Опубликована: Янв. 16, 2025

Abstract Collective behaviour forms the basis for many anti-predator strategies. Within Lepidoptera, larval gregariousness has evolved convergently across phylogenetically disparate lineages. While selection pressures shaping variation in social behaviours are well investigated, much less is known about mechanisms that control attraction and behavioural coordination. Similarly, little how secondary associated with living shape genome evolution. Here, using genomic data over 60 species from an adaptive radiation of Neotropical butterflies, Heliconiini, which gregarious repeatedly, we explore molecular repeated convergent shifts towards larvae. We focus on three main areas evolution: differential homologous genes, accelerated rates evolution non-coding regions key gene expression brains solitary identify strong signatures evolution, both coding loci, Heliconiini lineages behaviour. Molecular convergence also detected at transcriptomic level brains, suggesting regulation neural tissue. Among loci showing signals lineages, several candidates linked to activity, feeding behaviour, immune pathways. Our results suggest sociality profoundly changes acting multiple physiological, immunological traits.

Язык: Английский

Процитировано

0
Müllerian mimicry in Neotropical butterflies: One mimicry ring to bring them all, and in the jungle bind them DOI Creative Commons
Eddie Pérochon, Neil Rosser, Krzysztof M. Kozak

и другие.

bioRxiv (Cold Spring Harbor Laboratory), Год журнала: 2025, Номер unknown

Опубликована: Янв. 31, 2025

Abstract Understanding the mechanisms underlying species distributions and coexistence is essential to predict prevent impacts of global change, particularly in biodiversity hotspots. However, effects biotic interactions may be challenging investigate at large spatial scales. Leveraging well-characterized Müllerian mimetic systems Neotropical butterflies, we investigated patterns mutualistic within between two tribes aposematic Nymphalid butterflies: Heliconiini (Heliconiinae) Ithomiini (Danainae). Despite 85 My independent evolutionary histories, many share similar warning wing across Neotropics. In this study show that both form hotspots with a high prevalence rare tropical Andes. reveal higher relative richness heliconiine butterflies than ithomiines Amazon basin contrasting Andean concentration ithomiine diversity. difference broadscale diversity patterns, also document large-scale associations among phenotypically tribes, thereby providing new empirical evidence for Fritz Müller’s historical model mimicry continental scale. Furthermore, comparative phylogenetic analyses suggest co-mimetic have converged towards climatic niches as response selection favoring co-occurrence. Our findings illustrate strength shaping scale supporting niche convergence even millions years evolution. Critically, it emphasizes pervasive vulnerability communities, bound by positive interactions, disassembly induced climate change. Significance statement remarkable example convergent evolution driven natural where coexisting prey converge their signal advertising defenses predators. Heliconiine found throughout rainforests were instrumental model, which provided mechanism such resemblance. decades fieldwork museum collections, color present strikingly distributions, regardless how closely related they are. Such co-occurrence appears reinforced requirements look-alike species. emphasize key role spanning phylogenetically distant clades.

Язык: Английский

Процитировано

0
Gene novelty and gene family expansion in the early evolution of Lepidoptera DOI Creative Commons

Asia E. Hoile,

Peter W. H. Holland, Peter O. Mulhair

и другие.

BMC Genomics, Год журнала: 2025, Номер 26(1)

Опубликована: Фев. 19, 2025

Abstract Background Almost 10% of all known animal species belong to Lepidoptera: moths and butterflies. To understand how this incredible diversity evolved we assess the role gene gain in driving early lepidopteran evolution. Here, compared complete genomes 115 insect species, including 99 Lepidoptera, search for novel genes coincident with emergence Lepidoptera. Results We find 217 orthogroups or families which emerged on branch leading Lepidoptera; these 177 likely arose by duplication followed extensive sequence divergence, 2 are candidates origin horizontal transfer, 38 have no homology outside Lepidoptera possibly via de novo genesis. focus two new that conserved across underwent duplication, suggesting important roles biology. One encodes a family sugar ion transporter molecules, potentially involved evolution diverse feeding behaviours The second unusual propeller-shaped proteins originated transfer from Spiroplasma bacteria; name propellin genes. Conclusion provide first insights into genetic novelty This gives insight rate during order as well providing context mechanisms origin. describe examples were retained duplicated further their importance

Язык: Английский

Процитировано

0
Lepidopteran scale cells derive from sensory organ precursors through a canonical lineage DOI Creative Commons
Ling S. Loh, Kyle A. DeMarr, Christa Heryanto

и другие.

Development, Год журнала: 2025, Номер 152(5)

Опубликована: Март 1, 2025

The success of butterflies and moths is tightly linked to the origin scales within group. A long-standing hypothesis postulates that are homologous well-described mechanosensory bristles found in fruit fly Drosophila melanogaster, as both derive from an epithelial precursor. Previous histological candidate gene approaches identified parallels genes involved scale bristle development. Here, we provide developmental transcriptomic evidence differentiation lepidopteran derives sensory organ precursor (SOP). Live imaging pupae shows SOP cells undergo two asymmetric divisions first abrogate neurogenic lineage, then lead a differentiated its associated socket cell. Single-nucleus RNA sequencing using early pupal wings revealed differential expression patterns mirror development, suggesting shared program. Additionally, recovered newly gene, transcription factor pdm3, proper butterfly wing scales. Altogether, these data open up avenues for understanding type specification illustrate how single-cell transcriptomics powerful platform evolution cell types.

Язык: Английский

Процитировано

0
Genetic basis of an adaptive polymorphism controlling butterfly silver iridescence DOI Creative Commons
Luca Livraghi, Joseph J. Hanly, Ling S. Loh

и другие.

Current Biology, Год журнала: 2025, Номер unknown

Опубликована: Апрель 1, 2025

Identifying the genes and mutations that drive phenotypic variation which are subject to selection is crucial for understanding evolutionary processes. Mormon Fritillary butterflies (Speyeria mormonia) exhibit a striking wing color polymorphism throughout their range: typical morphs bear silver spots on ventral surfaces can co-occur with unsilvered displaying dull coloration.1 Through genome-wide association studies in two polymorphic populations, we fine-map this difference silvering 3' region of transcription factor gene optix. The expression optix confined regions surround spots, these patterns transformed identity upon RNA interference (RNAi) knockdown, implicating as repressor scales butterfly. We show haplotype shows signatures recent selective sweeps allele shared an population Speyeria hydaspe, suggesting introgressions may facilitate exchange variants adaptive potential across species. Remarkably, findings parallel role allelic sharing cis-regulatory modulation shaping aposematic red Heliconius butterflies,2,3,4,5,6,7 lineage separated from 45 million years ago.8 genetic basis thus be more predictable than often presumed, even traits appear divergent large distances.

Язык: Английский

Процитировано

0
A butterfly pan-genome reveals that a large amount of structural variation underlies the evolution of chromatin accessibility DOI Creative Commons
Angelo Alberto Ruggieri, Luca Livraghi, James J. Lewis

и другие.

Genome Research, Год журнала: 2022, Номер 32(10), С. 1862 - 1875

Опубликована: Сен. 15, 2022

Despite insertions and deletions being the most common structural variants (SVs) found across genomes, not much is known about how these SVs vary within populations between closely related species, nor their significance in evolution. To address questions, we characterized evolution of indel using genome assemblies three

Язык: Английский

Процитировано

20
Ecological Diversification in an Adaptive Radiation of Plants: The Role of De Novo Mutation and Introgression DOI Creative Commons
Benjamin W. Stone, Carolyn A. Wessinger

Molecular Biology and Evolution, Год журнала: 2024, Номер 41(1)

Опубликована: Янв. 1, 2024

Abstract Adaptive radiations are characterized by rapid ecological diversification and speciation events, leading to fuzzy species boundaries between ecologically differentiated species. therefore key systems for understanding how formed maintained, including the role of de novo mutations versus preexisting variation in adaptation genome-wide consequences hybridization events. For example, adaptive introgression, where beneficial alleles transferred lineages through hybridization, may fuel facilitate new environments. In this study, we employed whole-genome resequencing data investigate evolutionary origin hummingbird-pollinated flowers characterize patterns phylogenetic discordance introgression Penstemon subgenus Dasanthera, a small diverse radiation plants. We found that magenta hummingbird-adapted have apparently evolved twice from ancestral blue-violet bee-pollinated within radiation. These shifts flower color accompanied variety inactivating anthocyanin pathway enzyme, suggesting independent loss-of-function underlie parallel evolution trait. Although were heterogenous across genome, strong effect gene density suggests that, general, natural selection opposes maintains genetic differentiation gene-rich genomic regions. Our results highlight importance both mutation as sources change indicate driving radiations.

Язык: Английский

Процитировано

4
Key homeobox transcription factors regulate the development of the firefly’s adult light organ and bioluminescence DOI Creative Commons
Xinhua Fu, Xinlei Zhu

Nature Communications, Год журнала: 2024, Номер 15(1)

Опубликована: Март 5, 2024

Abstract Adult fireflies exhibit unique flashing courtship signals, emitted by specialized light organs, which develop mostly independently from larval organs during the pupal stage. The mechanisms of adult organ development have not been thoroughly studied until now. Here we show that key homeobox transcription factors AlABD-B and AlUNC-4 regulate bioluminescence in firefly Aquatica leii . Interference with expression AlAbd-B AlUnc-4 genes results undeveloped or non-luminescent organs. regulates , they interact each other. activate luciferase gene AlLuc1 some peroxins. Four peroxins are involved import AlLUC1 into peroxisomes. Our study provides insights flash signal control fireflies.

Язык: Английский

Процитировано

4
Extensive sequence analysis: revealing genomic knowledge throughout various domains DOI
Abdul Razak Mohamed Sikkander, Suman Lata Tripathi,

G. Theivanathan

и другие.

Elsevier eBooks, Год журнала: 2025, Номер unknown, С. 17 - 30

Опубликована: Янв. 1, 2025

Язык: Английский

Процитировано

0