Evolution最新文献_第8页

Experimental adaptation to larval malnutrition maintains male post-copulatory sexual success despite reduced investment in accessory glands. 对幼虫营养不良的实验性适应维持了雄性交配后的性成功，尽管减少了对副腺体的投资。

IF 3 2区环境科学与生态学

Evolution Pub Date : 2026-09-04 DOI: 10.1093/evolut/qpag157

Berta Canal Domènech, Youn Henry, Christine La Mendola, Tadeusz J Kawecki

{"title":"Experimental adaptation to larval malnutrition maintains male post-copulatory sexual success despite reduced investment in accessory glands.","authors":"Berta Canal Domènech, Youn Henry, Christine La Mendola, Tadeusz J Kawecki","doi":"10.1093/evolut/qpag157","DOIUrl":"https://doi.org/10.1093/evolut/qpag157","url":null,"abstract":"We report the consequences of >330 generations of experimental evolution under larval undernutrition for male postcopulatory success and traits thought to mediate it in Drosophila melanogaster, comparing them to phenotypically plastic responses. Males from populations evolved on standard diet showed a >30% plastic reduction in the size of accessory glands (AG) when raised on a nutrient-poor larval diet. Experimental evolution on the poor diet led to a further reduction that was more pronounced in smaller individuals, changing the allometric slope between AG and wing size. Rather than the expected reduction in seminal fluid protein expression, we observed a plastic increase on poor diet in investment in Acp36DE and Acp62F at the expense of Acp26Aa and SP, and an evolutionary shift in the time course towards lower virgin and higher post-mating SFP expression. Surprisingly, neither the plastic nor evolved reduction in AG was associated with impaired performance in reproductive output from matings with excess females, the ability to induce female oviposition or performance in sperm competition (\"sperm defense\"), except when poor diet-adapted males were raised on standard diet. Thus, larval nutrient shortage favors reduced investment in AG development, but this is compensated for by other mechanisms, minimizing consequences for postcopulatory success.","PeriodicalId":12082,"journal":{"name":"Evolution","volume":" ","pages":""},"PeriodicalIF":3.0,"publicationDate":"2026-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148891181","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Genomic response to sex-separated gene pools. 对性别分离基因库的基因组反应。

IF 3 2区环境科学与生态学

Evolution Pub Date : 2026-09-04 DOI: 10.1093/evolut/qpag156

Chloe Melo-Gavin, Karl Grieshop, Aneil F Agrawal

{"title":"Genomic response to sex-separated gene pools.","authors":"Chloe Melo-Gavin, Karl Grieshop, Aneil F Agrawal","doi":"10.1093/evolut/qpag156","DOIUrl":"https://doi.org/10.1093/evolut/qpag156","url":null,"abstract":"Males and females experience differences in the strength and direction of selection but discerning the type of genes that are targets of sex differences in selection is complicated by their shared genome. We used experimental evolution in Drosophila melanogaster to partially separate the gene pools of males and females for 130 generations. In six replicate populations, we forced one pool of genetically variable Chromosome 2s to experience patrilinear inheritance (segregating like a Y-chromosome) and male-limited selection. The alternative pool segregated like an X-chromosome and experienced female-biased selection. This allowed alleles which are differentially selected for between the sexes to diverge between these pools, enabling us to gain insight into the type of genes subject to such selection. We find that genes which diverge between these pools have an elevated intersexual genetic correlation(rMF) for expression on average, consistent with the idea that high genetic correlations may hinder sex-specific adaptation under normal inheritance. Diverged genes were also enriched for moderately male-biased genes whereas female-biased genes were underrepresented. At the SNP level, we find an overrepresentation of diverged SNPs involved in splicing or occurring in the 5'UTR and an underrepresentation of missense or synonymous SNPs, suggesting sex differences in selection for isoform usage.","PeriodicalId":12082,"journal":{"name":"Evolution","volume":" ","pages":""},"PeriodicalIF":3.0,"publicationDate":"2026-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148891239","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Dissecting contributions of directional and balancing selection to trajectories of mitochondrial haplotype evolution in Drosophila melanogaster. 定向和平衡选择对黑腹果蝇线粒体单倍型进化轨迹的解剖贡献。

IF 3 2区环境科学与生态学

Evolution Pub Date : 2026-09-03 DOI: 10.1093/evolut/qpag152

Jade R Kannangara, Tim Connallon, André N Alves, Damian K Dowling

{"title":"Dissecting contributions of directional and balancing selection to trajectories of mitochondrial haplotype evolution in Drosophila melanogaster.","authors":"Jade R Kannangara, Tim Connallon, André N Alves, Damian K Dowling","doi":"10.1093/evolut/qpag152","DOIUrl":"https://doi.org/10.1093/evolut/qpag152","url":null,"abstract":"Emerging evidence suggests mtDNA haplotypes contribute to fitness variation and local adaptation, with directional thermal selection and negative frequency-dependent selection shaping haplotype diversity. However, their interplay remains unexplored. We conducted experimental evolution using Drosophila melanogaster populations from opposite ends of an Australian latitudinal cline (Melbourne and Townsville), exposing them to contrasting temperatures (17°C versus 27°C) and varying starting frequencies of two mtDNA haplotypes (A1 and B1) that occur at appreciable frequencies in these populations. We paired this with population genetic simulations to estimate selection and its influence on haplotype trajectories. Haplotype frequencies were influenced by interactions involving temperature, starting frequency, and nuclear genomic background (Melbourne, Townsville, or admixed). Although prior work predicted A1 should be favoured at the warmer temperature and B1 at the cooler temperature, A1 was generally favoured across both temperatures. Simulations supported directional selection in populations evolving at 17°C in the Melbourne background; otherwise dynamics were best explained by balancing selection shaped by negative frequency-dependent fitness effects. Patterns also varied across nuclear backgrounds, suggestive of mito-nuclear epistasis. These findings challenge a simple thermal adaptation model of mtDNA dynamics, suggesting that mtDNA evolution is shaped by interacting effects of temperature, frequency-dependence, nuclear background and experimental environment.","PeriodicalId":12082,"journal":{"name":"Evolution","volume":" ","pages":""},"PeriodicalIF":3.0,"publicationDate":"2026-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148886027","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The evolution of sexual dichromatism in a large radiation of landfowl: Re-examining female-biased selection in Wallace's model. 大规模陆禽种群性别二色性的进化：重新审视华莱士模型中的雌性偏向性选择。

IF 3 2区环境科学与生态学

Evolution Pub Date : 2026-09-03 DOI: 10.1093/evolut/qpag148

Zheng Li, Jiaqi Zhang, De Chen, Jinhan Jia, Lu Dong

{"title":"The evolution of sexual dichromatism in a large radiation of landfowl: Re-examining female-biased selection in Wallace's model.","authors":"Zheng Li, Jiaqi Zhang, De Chen, Jinhan Jia, Lu Dong","doi":"10.1093/evolut/qpag148","DOIUrl":"https://doi.org/10.1093/evolut/qpag148","url":null,"abstract":"Sexual dichromatism is generally thought to arise from sexual selection favouring elaborately coloured males, as proposed in Darwin's model. Wallace offers an expanded perspective, emphasising that the evolution of cryptic and dim female colouration to evade nest predation significantly contributed to the origin of sexual dichromatism. However, previous studies on the evolutionary forces of sexual dichromatism examining Darwin's and Wallace's models have produced mixed results. Here, we re-examined Wallace's model of female-biased selection using the largest and most ecologically diverse family of landfowl (Phasianidae), known for its wide-ranging distribution and striking colour patterns. Our results demonstrate that the level of sexual dichromatism is negatively correlated with colour complexity in females but not males, and the evolutionary rates of sexual dichromatism are positively correlated with the evolutionary rates of colour complexity in both sexes. Furthermore, we show that female colour complexity is significantly associated with nest exposure, consistent with predation-related ecological constraints on female colour evolution. Together, these findings support Wallace's model by highlighting the importance of nest predation in shaping female colouration, while further suggesting that the evolution of sexual dichromatism reflects the dynamic interplay of natural and sexual selection.","PeriodicalId":12082,"journal":{"name":"Evolution","volume":" ","pages":""},"PeriodicalIF":3.0,"publicationDate":"2026-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148886159","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Strong assortative mating with nest site partitioning may facilitate species coexistence during secondary contact in island birds. 在岛鸟的二次接触中，强烈的分类交配与巢址划分可能促进物种共存。

IF 3 2区环境科学与生态学

Evolution Pub Date : 2026-09-02 DOI: 10.1093/evolut/qpag154

Elsie H Shogren, Nysus Paru, Jonson Pepere, George Wabasea, Mage Wabasea, Adam C Stein, J Albert C Uy

{"title":"Strong assortative mating with nest site partitioning may facilitate species coexistence during secondary contact in island birds.","authors":"Elsie H Shogren, Nysus Paru, Jonson Pepere, George Wabasea, Mage Wabasea, Adam C Stein, J Albert C Uy","doi":"10.1093/evolut/qpag154","DOIUrl":"https://doi.org/10.1093/evolut/qpag154","url":null,"abstract":"Species coexistence is critical to the assembly of biodiverse communities. When closely related species come into secondary contact, competitive and reproductive interactions can both influence the potential for coexistence. We tested whether ecological and/or evolutionary factors affect coexistence dynamics in a pair of closely related honeyeaters that have come into secondary contact in the Solomon Islands. Myzomela cardinalis colonized the island of Makira and established a population in sympatry with the endemic M. tristrami. These taxa are ecologically similar and hybridize. If ecological factors are promoting coexistence, we expect species to partition where they forage for resources or defend breeding territories. In addition, evolutionary pressures may facilitate coexistence if species mate assortatively, avoiding production of potentially low-fitness hybrid offspring. Using data on foraging locations, nest locations, and mate pairing, we find support for partitioning of space use, specifically in the context of nest placement. Phenotypic pairs of the recently arrived species nested significantly closer to the coastline than did endemic species pairs. We also find strong evidence of assortative mating based on phenotype. Thus, both ecological and evolutionary factors appear to contribute to the coexistence of these closely related hybridizing species.","PeriodicalId":12082,"journal":{"name":"Evolution","volume":" ","pages":""},"PeriodicalIF":3.0,"publicationDate":"2026-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148879559","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Natural and artificial selection generate distinct cranial diversification pathways in bats and domestic dogs. 自然选择和人工选择在蝙蝠和家犬中产生了不同的颅骨多样化途径。

IF 3 2区环境科学与生态学

Evolution Pub Date : 2026-08-31 DOI: 10.1093/evolut/qpag151

Adriana Calahorra-Oliart, Alexa Kane, Alisa Hutagalung, Laurel R Yohe

{"title":"Natural and artificial selection generate distinct cranial diversification pathways in bats and domestic dogs.","authors":"Adriana Calahorra-Oliart, Alexa Kane, Alisa Hutagalung, Laurel R Yohe","doi":"10.1093/evolut/qpag151","DOIUrl":"https://doi.org/10.1093/evolut/qpag151","url":null,"abstract":"How far can evolution push a complex structure before hitting developmental limits, and when can it break free to explore new forms? Domestic dogs (Canis familiaris) represent the most extreme skull shape diversity generated within a single species through recent artificial selection, while neotropical leaf-nosed bats (Phyllostomidae) showcase the broadest craniofacial radiation in mammals, shaped over millions of years of natural selection. Because these contrasting systems belong to the same mammalian superorder, they provide an opportunity to test whether skull evolution is constrained by the same limits operating at short timescales, or whether adaptive radiations enable access to novel morphologies at macroevolutionary scales. Using three-dimensional geometric morphometrics of 33 canids (dog breeds and wild species) and 62 phyllostomid species, we mapped cranial variation across morphospace to assess disparity and modularity, and then compared the dominant directions of cranial shape variation between clades. Despite the overlap in morphospace for some bats and dogs, we found numerous examples of evolutionary novelty in bats, supporting the emergence of macroevolutionary innovation. Both clades varied along a primary axis of snout elongation and shortening, but with distinct outcomes: the slightly more modular canine skull was largely confined to a single dominant direction of variation, whereas phyllostomids dispersed along multiple axes while occupying regions inaccessible to dogs despite exhibiting stronger cranial integration. While artificial selection in dogs has produced much more disparity per unit of evolutionary time, natural selection in bats reveals repeated evolutionary innovations rather than constrained scaling. These results demonstrate that artificial selection may inflate variation along a constrained axis, while natural selection may allow structural innovation beyond the limits of microevolutionary change.","PeriodicalId":12082,"journal":{"name":"Evolution","volume":" ","pages":""},"PeriodicalIF":3.0,"publicationDate":"2026-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148864340","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

When insects smell like plants: how sensory bias shapes insect pheromone evolution. 当昆虫闻起来像植物：感觉偏差如何影响昆虫信息素的进化。

IF 3 2区环境科学与生态学

Evolution Pub Date : 2026-08-29 DOI: 10.1093/evolut/qpag149

Kathy Darragh

引用次数: 0

Sperm competition shapes anuran testicular architecture through tubule and tissue adjustments. 精子的竞争通过小管和组织的调整塑造了人类睾丸结构。

IF 3 2区环境科学与生态学

Evolution Pub Date : 2026-08-29 DOI: 10.1093/evolut/qpag150

Lingsen Cao, Long Jin, Yiming Wu, Li Zhao, Yanbo Sun, Qixin Zhou, Wenbo Liao

{"title":"Sperm competition shapes anuran testicular architecture through tubule and tissue adjustments.","authors":"Lingsen Cao, Long Jin, Yiming Wu, Li Zhao, Yanbo Sun, Qixin Zhou, Wenbo Liao","doi":"10.1093/evolut/qpag150","DOIUrl":"https://doi.org/10.1093/evolut/qpag150","url":null,"abstract":"Testis morphology may act as a determinant of sperm size, and the evolutionary pressure to produce longer sperm may impose functional constraints on testicular architecture. Postcopulatory sexual selection, particularly sperm competition, is widely recognised as a primary driver of the remarkable interspecific variation in sperm size and number across animals. Theoretical hypotheses predict that longer sperm require wider seminiferous tubules and that intense sperm competition favours an increased proportion of sperm-producing (seminiferous) tissue relative to non-spermatogenic components, independent of overall testis size. Using a phylogenetic comparative approach across 78 anuran species, we tested these two predictions. Our analyses revealed that the cross-sectional area of the seminiferous tubules was significantly and positively correlated with sperm length, thereby supporting the proposed morphogenetic constraint. Furthermore, relative testis size, which was used as a validated proxy for sperm competition intensity, was positively associated with the proportion of seminiferous tissue. In contrast, absolute testis size did not predict this tissue proportion. Our findings suggest that sperm competition shapes anuran testicular architecture through two distinct evolutionary pathways: indirect selection for wider tubules mediated by longer sperm, and direct selection for increased investment in seminiferous tissue. This tissue optimisation extends beyond simple testicular enlargement and reveals sophisticated evolutionary adaptations to postcopulatory sexual selection.","PeriodicalId":12082,"journal":{"name":"Evolution","volume":" ","pages":""},"PeriodicalIF":3.0,"publicationDate":"2026-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148857122","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

How do mate-finding Allee effects affect evolutionary rescue? 寻找配偶的Allee效应如何影响进化拯救？

IF 3 2区环境科学与生态学

Evolution Pub Date : 2026-08-17 DOI: 10.1093/evolut/qpag095

Puneeth Deraje, Hildegard Uecker

{"title":"How do mate-finding Allee effects affect evolutionary rescue?","authors":"Puneeth Deraje, Hildegard Uecker","doi":"10.1093/evolut/qpag095","DOIUrl":"10.1093/evolut/qpag095","url":null,"abstract":"In sexually reproducing populations, the challenge of finding mates at low densities can impose a strong demographic Allee effect. Environmental change can cause a population to fall below its Allee threshold by reducing the population size or by increasing the threshold if the latter depends on affected life-history traits. Evolutionary rescue then relies on overcoming the Allee effect, which gets increasingly difficult as the population declines. Despite mate-finding Allee effects being common, most models of evolutionary rescue assume that mating is assured even at low densities. Here, we set up a population genetic model to study the potential for evolutionary rescue of a population below its Allee threshold. For the analysis, we combine stochastic computer simulations with mathematical arguments. As expected, mate limitation can severely impede rescue, but the extent differs across sexual systems. We further show that it shifts the optimal sex ratio for dioecious but not for androdioecious populations, alters optimal evolutionary routes when there are trade-offs between increasing mate-finding efficiency and fecundity, and enhances the importance of standing genetic variation relative to de novo mutants. Overall, our results highlight the importance of accounting for positive density dependence in the assessment of a population's scope for evolutionary rescue.","PeriodicalId":12082,"journal":{"name":"Evolution","volume":" ","pages":"1733-1747"},"PeriodicalIF":3.0,"publicationDate":"2026-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148028686","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

History of divergence and gene flow shaping geographic variation in Andean warblers (Myioborus). 安第斯林莺（Myioborus）的分化史和基因流形成地理变异。

IF 3 2区环境科学与生态学

Evolution Pub Date : 2026-08-17 DOI: 10.1093/evolut/qpag083

Laura N Céspedes Arias, Andrés M Cuervo, Carlos Daniel Cadena, Elisa Bonaccorso, Christopher Witt, Irby Lovette, Leonardo Campagna

{"title":"History of divergence and gene flow shaping geographic variation in Andean warblers (Myioborus).","authors":"Laura N Céspedes Arias, Andrés M Cuervo, Carlos Daniel Cadena, Elisa Bonaccorso, Christopher Witt, Irby Lovette, Leonardo Campagna","doi":"10.1093/evolut/qpag083","DOIUrl":"10.1093/evolut/qpag083","url":null,"abstract":"Studying how genetic variation is structured across space, and how it relates to divergence in phenotypic traits relevant to reproductive isolation, is important for our understanding of the speciation process. We used ddRAD-seq data to examine genetic variation across the distribution of an Andean warbler species complex (Myioborus ornatus-melanocephalus), which includes a known hybrid zone between two taxa with striking plumage differences. Genetic structure reflects geographic variation in head plumage, with some breaks coinciding with major topographic barriers in the Andes. We found that M. o. chrysops and M. m. bairdi, the two hybridizing taxa, were characterized by low overall genetic divergence. Based on our cline analyses of plumage and genomic hybrid indices, this hybrid zone extends for approximately 250 km, where advanced generation hybrids are likely most common. We also identified a slight difference in the geographic centers of the plumage and genetic ancestry clines, potentially suggesting asymmetric introgression of chrysops-like plumage traits. By studying genetic variation in a phenotypically diverse group distributed across a topographically complex area that includes a hybrid zone, we show how both geographic features and plumage traits potentially relevant to mate choice may contribute to species formation and maintenance in tropical mountains.","PeriodicalId":12082,"journal":{"name":"Evolution","volume":" ","pages":"1685-1702"},"PeriodicalIF":3.0,"publicationDate":"2026-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147835637","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0