Journal of Evolutionary Biology最新文献_第7页

Mimetic females do not bear reproductive costs: Challenging the sexual selection hypothesis in female-limited mimetic polymorphism in butterflies. 模仿雌性不承担繁殖成本：挑战蝴蝶雌性有限模仿多态性的性选择假说。

IF 2.3 3区生物学

Journal of Evolutionary Biology Pub Date : 2025-09-02 DOI: 10.1093/jeb/voaf098

Shuya Yoshioka, Mitsuho Katoh, Tomohiro Suzuki, Kaori Tsurui-Sato, Kazuki Tsuji

{"title":"Mimetic females do not bear reproductive costs: Challenging the sexual selection hypothesis in female-limited mimetic polymorphism in butterflies.","authors":"Shuya Yoshioka, Mitsuho Katoh, Tomohiro Suzuki, Kaori Tsurui-Sato, Kazuki Tsuji","doi":"10.1093/jeb/voaf098","DOIUrl":"https://doi.org/10.1093/jeb/voaf098","url":null,"abstract":"Batesian mimicry has been regarded as classic evidence of adaptation by natural selection, in which a palatable species avoids predation by resembling unpalatable species. In some butterfly species, Batesian mimicry is female-limited and mimetic females coexist with male-like (nonmimetic) females. Why do nonmimetic females continue to exist despite the possible differential predation pressure? One possible hypothesis is a trade-off between the anti-predatory defence and mating success. Specifically, mimetic females may be less attractive to conspecific males as they look like heterospecific butterflies. However, empirical studies based on behavioural data have shown mixed results. Here, we directly investigated female mating frequency by counting spermatophores and compared it between mimetic and nonmimetic females in a Batesian mimetic butterfly, Papilio polytes. The mating frequencies of the two types of females were almost identical in all four studied populations. More than 99% of females copulated at least once regardless of morph. In addition, the spermatophore counts increased with age and did not differ between morphs. Our results strongly suggest that the anti-predatory traits are unlikely to be costly to the reproductive success of mimetic P. polytes females, providing no support for the sexual selection hypothesis regarding maintenance of mimetic polymorphism.","PeriodicalId":50198,"journal":{"name":"Journal of Evolutionary Biology","volume":" ","pages":""},"PeriodicalIF":2.3,"publicationDate":"2025-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144977092","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Multi-level analysis of morphological variation in the vertebral column of lagomorph mammals. lagomorph哺乳动物脊柱形态变异的多层次分析。

IF 2.3 3区生物学

Journal of Evolutionary Biology Pub Date : 2025-08-28 DOI: 10.1093/jeb/voaf102

Nuttakorn Taewcharoen, Megu Gunji, Rachel Norris, Emma Sherratt

{"title":"Multi-level analysis of morphological variation in the vertebral column of lagomorph mammals.","authors":"Nuttakorn Taewcharoen, Megu Gunji, Rachel Norris, Emma Sherratt","doi":"10.1093/jeb/voaf102","DOIUrl":"https://doi.org/10.1093/jeb/voaf102","url":null,"abstract":"Characterising morphological variation along the vertebral column of mammals is commonly investigated at a broad phylogenetic scale, leaving within-species variation understudied due to the requirement of larger sample sizes. This leads to a knowledge gap of how variation within species relates to morphological diversity among species. Here, we overcome these limitations and examine the morphological variation at the within-species level in the vertebral column of four species-equivalent groups of rabbits and hares. We then expanded to the among-species levels of the family Leporidae, the order Lagomorpha, and broadly among terrestrial placentals. We sampled nine vertebrae along the vertebral column of each specimen. Using a geometric morphometric approach, we calculated the Procrustes variance of vertebrae shapes and used this as an index for the extent of morphological variation of each vertebra along the vertebral column, which we call the profile. We find that the profile of morphological variation along the column differs among species and between phylogenetic levels; among-species variation is not simply a scaled-up profile of the within-species level. We highlight that by adopting the multi-level analysis, we can better understand how the mammalian vertebral column can evolve.","PeriodicalId":50198,"journal":{"name":"Journal of Evolutionary Biology","volume":" ","pages":""},"PeriodicalIF":2.3,"publicationDate":"2025-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144977057","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

An MHC class II supertype confers resistance to a sexually transmitted bacterium in females but not in males in a genetically monogamous seabird. 在遗传上一夫一妻制的海鸟中，MHC II类超型赋予雌性对性传播细菌的抵抗力，而雄性则没有。

IF 2.3 3区生物学

Journal of Evolutionary Biology Pub Date : 2025-08-28 DOI: 10.1093/jeb/voaf097

Léa Ribeiro, Pierrick Blanchard, Frédéric Manas, Maxime Pineaux, Étienne Danchin, Scott A Hatch, Sarah Leclaire

{"title":"An MHC class II supertype confers resistance to a sexually transmitted bacterium in females but not in males in a genetically monogamous seabird.","authors":"Léa Ribeiro, Pierrick Blanchard, Frédéric Manas, Maxime Pineaux, Étienne Danchin, Scott A Hatch, Sarah Leclaire","doi":"10.1093/jeb/voaf097","DOIUrl":"https://doi.org/10.1093/jeb/voaf097","url":null,"abstract":"The major histocompatibility complex (MHC) is a gene cluster essential for pathogen recognition in jawed vertebrates. It encompasses the MHC class I genes which primarily recognize intracellular parasites, and the MHC class II genes which primarily recognize extracellular parasites. In wild birds, most studies investigating associations between MHC variants and parasites have been carried out in passerines, and have repeatedly shown that specific MHC class I variants provide resistance to intracellular haemosporidian parasites. In contrast, research on the associations between MHC variants and parasites in non-passerine birds remains limited. In this study, we examined the association between MHC-IIB supertypes and the bacterial load of a sexually transmitted bacterium (named C34) in the black-legged kittiwake (Rissa tridactyla), a genetically monogamous seabird. We focused on MHC class II genes because extracellular parasites are particularly prevalent in non-passerines and may therefore exert strong selection on the studied host. We found that females with lower C34 load had better reproductive performance, and higher probability to carry the MHC-IIB supertype SUP6. In contrast, in males, we observed a positive association between C34 load and reproductive performance, but no association between C34 load and MHC-IIB supertypes. While sexually transmitted diseases are not expected to be a strong selective force in genetically monogamous species, our study suggests that C34 might exert a selective pressure on the evolution of the MHC-IIB. Therefore, further research should explore the influence of sexually transmitted diseases on the reproductive biology of genetically monogamous species.","PeriodicalId":50198,"journal":{"name":"Journal of Evolutionary Biology","volume":" ","pages":""},"PeriodicalIF":2.3,"publicationDate":"2025-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144976967","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Cheating death: selection on digestive physiology overcomes expected growth costs of anti-predator defenses. 欺骗死亡：消化生理学上的选择克服了反捕食者防御的预期生长成本。

IF 2.3 3区生物学

Journal of Evolutionary Biology Pub Date : 2025-08-28 DOI: 10.1093/jeb/voaf100

Michael O'Connor, Tara Lanzer, Wade Boys, Taylor Ping, Adam M Siepielski

{"title":"Cheating death: selection on digestive physiology overcomes expected growth costs of anti-predator defenses.","authors":"Michael O'Connor, Tara Lanzer, Wade Boys, Taylor Ping, Adam M Siepielski","doi":"10.1093/jeb/voaf100","DOIUrl":"https://doi.org/10.1093/jeb/voaf100","url":null,"abstract":"Organisms often face a fundamental trade-off between growth and predator avoidance, where traits that enhance growth - such as higher activity rates - also increase predation risk. While many species reduce activity in response to predators, potentially constraining growth, this trade-off can be mitigated if alternative traits, such as resource digestive efficiency, compensate for reduced activity. Such trait compensation could enable organisms to minimize growth costs while evading predators. To test this idea, we combined a mesocosm experiment with lab-based digestive physiological assays to examine survival selection and plasticity in damselfly larvae exposed to fish predators. We found that selection favored less active individuals, yet this reduction in activity did not suppress growth. Instead, plastic increases in consumption rate, selection for greater assimilation efficiency, and weaker digestive stress responses allowed individuals to maintain growth despite reduced activity and elevated metabolic rates. Our results reveal that selection on digestive physiology can buffer organisms against the putative costs of predator avoidance, demonstrating how trait networks can decouple growth from predation risk in complex ecological systems.","PeriodicalId":50198,"journal":{"name":"Journal of Evolutionary Biology","volume":" ","pages":""},"PeriodicalIF":2.3,"publicationDate":"2025-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144977139","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Sexual selection in wild populations of seed bugs: the role of size in pre-copulatory mate choice by females and males. 野生种虫种群的性选择：大小在雌雄交配前择偶中的作用。

IF 2.3 3区生物学

Journal of Evolutionary Biology Pub Date : 2025-08-28 DOI: 10.1093/jeb/voaf101

Ophelia S Fritsch, David M Shuker

{"title":"Sexual selection in wild populations of seed bugs: the role of size in pre-copulatory mate choice by females and males.","authors":"Ophelia S Fritsch, David M Shuker","doi":"10.1093/jeb/voaf101","DOIUrl":"https://doi.org/10.1093/jeb/voaf101","url":null,"abstract":"Although sexual selection is a well-established part of evolutionary biology, controversies remain about the roles of males and females. For instance, despite clear evidence of male mate choice across a very broad range of species, traditional views of male and female sex roles - the former competitive, the latter choosy - are still common. In addition, studies looking at mate choice in natural populations, especially in terms of male mate choice, remain limited. Here, we consider body size, an important phenotype in mate choice in many species, and its association with patterns of non-random mating in wild populations of two species of seed bug, Spilostethus pandurus and Lygaeus creticus. We found strong directional pre-copulatory sexual selection for larger females in both species. On the other hand, patterns of selection on male size differed between the two species. There was directional sexual selection for larger individuals in L. creticus, and stabilising selection for intermediate-sized males in S. pandurus. Our results suggest that while males and females in both species mate non-randomly with respect to the body size of their partner, male precopulatory mate choice may be an important component of selection on females in the wild.","PeriodicalId":50198,"journal":{"name":"Journal of Evolutionary Biology","volume":" ","pages":""},"PeriodicalIF":2.3,"publicationDate":"2025-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144977144","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Evidence for ancient selective sweeps followed by differentiation among three species of Sphyrapicus sapsuckers. 古选择性扫荡的证据，随后是三种棘草的分化。

IF 2.3 3区生物学

Journal of Evolutionary Biology Pub Date : 2025-08-12 DOI: 10.1093/jeb/voaf096

Libby Natola, Darren Irwin

{"title":"Evidence for ancient selective sweeps followed by differentiation among three species of Sphyrapicus sapsuckers.","authors":"Libby Natola, Darren Irwin","doi":"10.1093/jeb/voaf096","DOIUrl":"https://doi.org/10.1093/jeb/voaf096","url":null,"abstract":"Genomic differentiation usually accompanies speciation, but that differentiation is often highly heterogeneous across the genome. Understanding what parts of the genome are more prone to differentiation can inform us about genomic regions and evolutionary processes that may be central to the speciation process. Here, we study genomic variation among three hybridizing species of North American woodpecker: red-breasted, red-naped, and yellow-bellied sapsuckers (Sphyrapicus ruber, S. nuchalis, and S. varius). We use whole genome resequencing to measure genetic variation among these species and to quantify how the level of differentiation varies across the genome. We find that regions of high relative differentiation between species (FST) tend to have low absolute differentiation between species (πB), indicating that regions of high relative differentiation often have more recent between-population coalescence times than regions of low relative differentiation do. Most of the high-FST genomic windows are found on the Z chromosome, pointing to this sex chromosome as being particularly important in sapsucker differentiation and potentially speciation. These results are consistent with a model of speciation in which selective sweeps of globally advantageous variants spread among partly differentiated populations, followed by differential local adaptation of those same genomic regions. We propose that sapsucker speciation may have occurred primarily via this process occurring on the Z chromosomes, resulting in genetic incompatibilities involving divergent Z chromosomes.","PeriodicalId":50198,"journal":{"name":"Journal of Evolutionary Biology","volume":" ","pages":""},"PeriodicalIF":2.3,"publicationDate":"2025-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144838459","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Developmental temperature, not inbreeding, shapes life history and locomotor behaviors in juvenile guppies (Poecilia reticulata). 幼小孔雀鱼（Poecilia reticulata）的生活史和运动行为由发育温度而非近亲繁殖决定。

IF 2.3 3区生物学

Journal of Evolutionary Biology Pub Date : 2025-08-08 DOI: 10.1093/jeb/voaf095

Md Mahmud-Al-Hasan, Michael D Jennions, Megan L Head

{"title":"Developmental temperature, not inbreeding, shapes life history and locomotor behaviors in juvenile guppies (Poecilia reticulata).","authors":"Md Mahmud-Al-Hasan, Michael D Jennions, Megan L Head","doi":"10.1093/jeb/voaf095","DOIUrl":"https://doi.org/10.1093/jeb/voaf095","url":null,"abstract":"Inbreeding is thought to play a strong role in shaping life-history traits and behaviors. Supporting evidence for this role often comes from observational studies. Experiments that establish causality and formally test how environmental factors moderate any effects of inbreeding remain underutilized. We ran an experiment to test how developmental temperature and inbreeding influence key life-history traits (growth rate, size and age at maturity, survival, sex ratio), and locomotor behaviors (boldness and habituation) in juvenile guppies (Poecilia reticulata). We used a controlled breeding design to generate inbred and outbred individuals that were then reared under a control (26°C) or an elevated temperature (30°C) until maturity. Developmental temperature strongly affected life-history traits; both sexes matured earlier at 30°C, but only males exhibited slower early growth and reduced size at maturity. Female growth and size at maturity was unaffected. The higher developmental temperature reduced boldness in both sexes; however, only females habituated to the novel test environment, but this trend was only significant for females that developed at 26°C. In contrast, inbreeding had no significant effects on any of the measured traits, nor did it significantly interact with temperature. In sum, under our experimental conditions, developmental temperature is the primary driver of phenotypic plasticity in guppies, generating sex-specific responses in both life history traits and behavior, while inbreeding between siblings had no detectable effects on any of the measured trait, even under thermal stress. Our findings highlight the key role of temperature in shaping developmental and behavioral trajectories, and reveal that a single generation of inbreeding may not always affect life history traits, even under environmental stress.","PeriodicalId":50198,"journal":{"name":"Journal of Evolutionary Biology","volume":" ","pages":""},"PeriodicalIF":2.3,"publicationDate":"2025-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144838458","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Luck can explain the positive link between fecundity and longevity: The Matthew effect in social insects and beyond. 运气可以解释繁殖力和寿命之间的积极联系：群居昆虫及其他方面的马太效应。

IF 2.3 3区生物学

Journal of Evolutionary Biology Pub Date : 2025-08-06 DOI: 10.1093/jeb/voaf094

Roman Zug, Susanne Foitzik, Hanna Kokko

{"title":"Luck can explain the positive link between fecundity and longevity: The Matthew effect in social insects and beyond.","authors":"Roman Zug, Susanne Foitzik, Hanna Kokko","doi":"10.1093/jeb/voaf094","DOIUrl":"https://doi.org/10.1093/jeb/voaf094","url":null,"abstract":"The universality of the trade-off between fecundity and longevity in life history theory is sometimes contested. Social insects present the arguably strongest challenge, as (i) queens not only monopolize reproduction, but also live much longer than workers, and (ii) within a caste, those individuals that lay more eggs are also observed to live longer. Positive fecundity-longevity relationships can appear in observational data even though an underlying trade-off exists, as individual variation in resource acquisition (e.g., variation in habitat quality) can mask the trade-off. Here we demonstrate theoretically that the fecundity-longevity trade-off in social insects can be easily masked even without differences in individual quality. Demographic stochasticity, caused by variable worker lifespans, leads to self-reinforcing dynamics (equivalent to the well-known \"Matthew effect\"), where \"lucky\" colonies exhibit healthy growth and long-lived, productive queens, while \"unlucky\" colonies show the opposite combination of traits. Allocation variation between individual queens, if present, can unmask the trade-off in principle, but the trade-off remains commonly concealed not only when measuring fecundity as a cumulative total (a strongly confounded measure as longer lived queens have more time to produce eggs), but also when measuring fecundity as a rate. Our results help align superorganismal fitness components with general life-history principles, and highlight the necessity of experimental manipulations when making statements regarding trade-offs or the lack thereof.","PeriodicalId":50198,"journal":{"name":"Journal of Evolutionary Biology","volume":" ","pages":""},"PeriodicalIF":2.3,"publicationDate":"2025-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144838460","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

An XY chromosome system in Laurus azorica, an endemic dioecious laurel from the Azores. 亚速尔群岛特有雌雄异株月桂的XY染色体系统。

IF 2.3 3区生物学

Journal of Evolutionary Biology Pub Date : 2025-08-02 DOI: 10.1093/jeb/voaf032

Catarina Branco, Guilherme Roxo, Isaline Chapoix, Ruben M C Rego, Hugo Tessarotto, Sylvain Santoni, Monica Moura, Gabriel A B Marais

{"title":"An XY chromosome system in Laurus azorica, an endemic dioecious laurel from the Azores.","authors":"Catarina Branco, Guilherme Roxo, Isaline Chapoix, Ruben M C Rego, Hugo Tessarotto, Sylvain Santoni, Monica Moura, Gabriel A B Marais","doi":"10.1093/jeb/voaf032","DOIUrl":"10.1093/jeb/voaf032","url":null,"abstract":"Baker's law posits that self-fertilization facilitates colonization, a key concept for understanding population dynamics and the evolution of sexual systems in plants. However, the prevalence of dioecious species (those with separate sexes) on oceanic islands presents a notable exception to this law, raising questions that have persisted since the initial debate between Baker and Carlquist nearly 60 years ago. Despite a number of important studies, we still lack comprehensive explanations for this intriguing pattern. Progress in this area may come from integrating various approaches, including botany, ecology, population genetics, and genomics. In this study, we aim to establish the Laurus genus as a model for investigating dioecy in oceanic islands. As a first step towards this goal, we have characterized the sex-determination type of Laurus azorica-a dioecious laurel endemic to the Azores-using a unique methodology to analyze sex chromosomes. Our findings indicate that L. azorica possesses an XY system that emerged approximately 5-10 million years ago, before the split with Laurus nobilis, its mainland counterpart. For the next steps, we plan to extend our analysis to L. nobilis and Laurus novocanariensis (endemic to Madeira and the Canary Islands) and conduct additional genomic studies to comprehensively characterize the sex-determination systems of these species, as well as their evolutionary dynamics and implications for the colonization of the Macaronesian islands.","PeriodicalId":50198,"journal":{"name":"Journal of Evolutionary Biology","volume":" ","pages":"1008-1015"},"PeriodicalIF":2.3,"publicationDate":"2025-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143702076","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Ecological specialization, clonal diversity, and local adaptation explain the co-existence of sexual and asexual grass thrips. 生态专门化、克隆多样性和局部适应性解释了有性和无性草蓟马的共存。

IF 2.3 3区生物学

Journal of Evolutionary Biology Pub Date : 2025-08-02 DOI: 10.1093/jeb/voaf076

Karim Ghali, Elodie Ramella, Morgane Henry, Tanja Schwander, Casper J van der Kooi

{"title":"Ecological specialization, clonal diversity, and local adaptation explain the co-existence of sexual and asexual grass thrips.","authors":"Karim Ghali, Elodie Ramella, Morgane Henry, Tanja Schwander, Casper J van der Kooi","doi":"10.1093/jeb/voaf076","DOIUrl":"10.1093/jeb/voaf076","url":null,"abstract":"The maintenance of sex is difficult to explain in the face of the demographic advantages of asexuality, especially when sexual and asexual lineages co-occur and compete. Here, we test if niche divergence and host plant specialization can contribute to the maintenance of sympatric populations of two closely related, sexual and asexual Aptinothrips grass thrips species. In mesocosm experiments, ecological niche and host plant specialization were inferred from thrips performances on different grass species used as hosts in natural populations. Sexual and asexual thrips performed best on different grass species, indicating niche differentiation. The asexual species was also characterized by a broader ecological niche than the sexual one. However, niche differentiation is unlikely to explain the maintenance of the two species in sympatry, because the reproductive rate of asexual females generally exceeded that of sexual ones. Surprisingly, the asexual but not sexual species showed geographic variation in the ecological niche. This geographic variation likely stems from variation in clonal assemblages among locations because different asexual genotypes have different ecological niches. Across natural populations, the performance of asexual females on a specific grass species was furthermore positively correlated with the abundance of that grass species, consistent with adaptation to locally abundant grasses. Altogether, our results suggest that niche differentiation contributes little to the co-occurrence of sexual and asexual grass thrips and that asexuality facilitates adaptation to a diversity of co-occurring host plants.","PeriodicalId":50198,"journal":{"name":"Journal of Evolutionary Biology","volume":" ","pages":"1016-1022"},"PeriodicalIF":2.3,"publicationDate":"2025-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144259302","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0