Journal of Evolutionary Biology最新文献_第3页

Expression of heat shock proteins and thermal sensitivity of male fertility across six Drosophila species. 6种果蝇雄性繁殖力热休克蛋白的表达及热敏感性研究。

IF 2.3 3区生物学

Journal of Evolutionary Biology Pub Date : 2026-04-02 DOI: 10.1093/jeb/voaf153

Claire H Smithson, Elizabeth J Duncan, Steven M Sait, Amanda Bretman

{"title":"Expression of heat shock proteins and thermal sensitivity of male fertility across six Drosophila species.","authors":"Claire H Smithson, Elizabeth J Duncan, Steven M Sait, Amanda Bretman","doi":"10.1093/jeb/voaf153","DOIUrl":"10.1093/jeb/voaf153","url":null,"abstract":"Understanding the mechanisms that confer resilience to thermal stress is crucial in the context of climate change. Recently there has been increasing focus on sublethal effects of high temperatures, such as on reproduction. Male fertility is particularly sensitive to heat, and the upper thermal fertility limit (TFL) is a better predictor of species' geographical ranges than lethal limits (LT) alone. Drosophila fruit fly species vary in their TFL and in the magnitude of difference between TFL and LT, but what drives this variation is unknown. We hypothesized that expression of heat shock proteins (Hsps), known to play a role in both the heat stress response and spermatogenesis, may explain these species differences. We compared the effects of a short, moderate thermal shock on the expression of seven Hsps in the male reproductive tract vs. the rest of the body, across six drosophilid species. Patterns of expression varied across tissues and species both before and after heat shock. There is some indication that species with lower lethal limits show greater upregulation in response to heat shock in somatic tissue. There was no clear pattern of differential regulation in relation to absolute TFL, but a suggestion that species with a larger TFL-LT gap lack differential regulation in reproductive tissue. Hence, while Hsp expression may play a role, there are clearly other mechanisms that underlie the sensitivity of species' fertility to elevated temperatures which need to be assessed.","PeriodicalId":50198,"journal":{"name":"Journal of Evolutionary Biology","volume":" ","pages":"451-459"},"PeriodicalIF":2.3,"publicationDate":"2026-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145812323","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

Among-trait covariance and cross-year repeatability for direct and indirect individual effects in producer-scrounger behaviour in wild house sparrows. 野生家雀生产-觅食行为的直接和间接个体效应的性状协方差和跨年可重复性。

IF 2.3 3区生物学

Journal of Evolutionary Biology Pub Date : 2026-04-02 DOI: 10.1093/jeb/voag003

Corné de Groot, Rori E Wijnhorst, Ådne M Nafstad, Alastair J Wilson, Yimen G Araya-Ajoy, Henrik Jensen, Jonathan Wright, Niels J Dingemanse

{"title":"Among-trait covariance and cross-year repeatability for direct and indirect individual effects in producer-scrounger behaviour in wild house sparrows.","authors":"Corné de Groot, Rori E Wijnhorst, Ådne M Nafstad, Alastair J Wilson, Yimen G Araya-Ajoy, Henrik Jensen, Jonathan Wright, Niels J Dingemanse","doi":"10.1093/jeb/voag003","DOIUrl":"10.1093/jeb/voag003","url":null,"abstract":"Variation in traits expressed during social interactions can be attributed to direct individual effects (DIEs) of the focal individual's identity and indirect individual effects (IIEs) of social partner identity. When of genetic origin and covarying with direct effects, indirect effects affect the expressed variation upon which selection can act; this can explain why evolution is slower or faster than predicted by classic theory. Little is known about how DIEs and IIEs covary across traits, even though such relationships should affect micro-evolutionary trajectories. We also do not know whether IIEs change over time or contexts. Here, we tested game-theoretical predictions of producer-scrounger tactic use during social foraging games in wild house sparrows (Passer domesticus). We used automated high-throughput phenotyping, where we assayed individuals repeatedly against different social partners. We provide evidence for IIEs and DIEs in producer-scrounger behaviour, and high cross-year repeatability. Both IEEs and DIEs were correlated among traits: producers depressed producing-but elicited increased scrounging-in others, and vice versa. This structure likely strongly constrains behavioural evolution. Indirect effects decreased the phenotypic variation in both behaviours. IEE-DIE correlations among and within traits may thus explain the long-term maintenance of stable social foraging strategies.","PeriodicalId":50198,"journal":{"name":"Journal of Evolutionary Biology","volume":" ","pages":"485-498"},"PeriodicalIF":2.3,"publicationDate":"2026-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145991517","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

Evolutionary rescue by adaptive specialization in rapidly changing environments. 在快速变化的环境中，适应性专业化的进化救援。

IF 2.3 3区生物学

Journal of Evolutionary Biology Pub Date : 2026-04-02 DOI: 10.1093/jeb/voaf154

Jeremy A Draghi

{"title":"Evolutionary rescue by adaptive specialization in rapidly changing environments.","authors":"Jeremy A Draghi","doi":"10.1093/jeb/voaf154","DOIUrl":"10.1093/jeb/voaf154","url":null,"abstract":"Theory suggests that a population with a narrower niche can adapt more rapidly to environmental change, all else being equal. However, a narrow niche may be correlated with other factors that compromise evolvability, such as a smaller population size, and it is unclear if specialist mutants can succeed by virtue of greater evolvability when impeded by the ecological costs of a narrower niche. Here, we use simulation models to show that specialist mutants can invade during periods of rapid environmental change, in some cases preventing extinction. Focusing on asexual populations, we show that successful specialist mutants typically enjoy 2 types of advantages over generalists: an immediate benefit of ignoring a habitat in which they are particularly unfit and a longer-term benefit of greater evolvability. By understanding the mechanisms that yield these benefits, we are also able to show that evolutionary rescue by specialization can be largely prevented by manipulating the schedule of environmental change. Our results demonstrate how a population may change fundamentally under strong pressure to adapt rapidly, with implications for both beneficial (e.g., conservation) and harmful (e.g., antibiotic resistance) examples of evolutionary rescue.","PeriodicalId":50198,"journal":{"name":"Journal of Evolutionary Biology","volume":" ","pages":"460-471"},"PeriodicalIF":2.3,"publicationDate":"2026-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145812331","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

Associations of dispersal traits with fecundity and clonal expansion among Japanese ant-dispersed sedges. 日本抗分散莎草散布性状与繁殖和克隆扩张的关系。

IF 2.3 3区生物学

Journal of Evolutionary Biology Pub Date : 2026-04-02 DOI: 10.1093/jeb/voag006

Koki Tanaka

{"title":"Associations of dispersal traits with fecundity and clonal expansion among Japanese ant-dispersed sedges.","authors":"Koki Tanaka","doi":"10.1093/jeb/voag006","DOIUrl":"10.1093/jeb/voag006","url":null,"abstract":"Dispersal syndrome, which describe covariation of dispersal traits with other traits, provide clues for potential selection pressures or evolutionary constraints imposed on dispersal. In plants, theory predicts various associations of dispersal traits with fecundity and clonal expansion, but dispersal syndromes involving these reproductive traits are empirically underexplored. This study examined the associations of two dispersal traits (elaiosome size and autochorous distance) with two reproductive traits (fecundity and clonal expansion) among 40 sedge species (Carex spp.), that disperse seeds through autochory, specifically postfloral stalk bending and growth, followed by myrmecochory. Of the two dispersal traits, longer autochorous distances are expected to reduce local seed clumping, while larger elaiosomes are known to result in longer dispersal distances through attraction of large ants. The principle component analysis using all dispersal and reproductive traits followed by the cluster analysis revealed three groups of sedge species. Of these, group 1 appears to be specialized for longer myrmecochorous distances, and consists of phalanx species with large elaiosome, low fecundity, and short autochorous distance. The other two groups appear to be more specialized for short-distance dispersal with local scattering by means of either the combination of long autochorous distance and high fecundity (group 2) or the clonal expansion (group 3). These trait association is consistent with the functional redundancy of the traits in risk spreading and/or the fecundity cost of producing larger elaiosomes. Moreover, the finding is among the first to show an existence of dispersal syndromes among myrmecochorous plants involving dispersal and reproductive traits.","PeriodicalId":50198,"journal":{"name":"Journal of Evolutionary Biology","volume":" ","pages":"523-534"},"PeriodicalIF":2.3,"publicationDate":"2026-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146068456","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

Evolutionary transitions and reversions in individuality. 个性的进化转变和逆转。

IF 2.3 3区生物学

Journal of Evolutionary Biology Pub Date : 2026-04-02 DOI: 10.1093/jeb/voag007

Martijn A Schenkel, J Arvid Ågren, Manus M Patten

{"title":"Evolutionary transitions and reversions in individuality.","authors":"Martijn A Schenkel, J Arvid Ågren, Manus M Patten","doi":"10.1093/jeb/voag007","DOIUrl":"10.1093/jeb/voag007","url":null,"abstract":"Biological individuality exists in different forms-unicellular, multicellular, colonial, etc.-which have arisen through evolutionary transitions in individuality. These involve bundling separate, lower-level individuals (particles) into higher-level ones (collectives) that transition to being individuals in their own right. What it is that \"transitions\" in the process is an open question inviting different answers, based on distinct conceptual accounts of biological individuality. We argue that evolutionary transitions in individuality always produce \"paradigmatic\" individuals, i.e., those identified as individuals under any concept. This renders distinguishing among individuality concepts moot, yielding two negative consequences. First, it has let evolutionary biologists refrain from declaring what kind of individuality they speak of in the evolutionary transitions in individuality, which has led them to talk past one another. Second, it has made them overlook the possibility that transitions may revert. Drawing on different individuality concepts, we identify two conceptually-different ways for collectives to \"lose\" their individuality. Paradigmatic reversions involve the complete undoing of a former evolutionary transition in individuality, e.g., a shift from multicellularity to unicellularity. Agential reversions do not involve such an organizational shift-a multicellular organism remains multicellular-but rather see the level at which selection and adaptation prevails change. Whereas paradigmatic reversions could also be caused by ecological shifts, agential reversions can occur only through internal conflict, where different particles within a collective have mutually-exclusive evolutionary interests. We conclude by discussing how reversions help create a more elaborate and accurate understanding of individuality and its evolution.","PeriodicalId":50198,"journal":{"name":"Journal of Evolutionary Biology","volume":" ","pages":"423-436"},"PeriodicalIF":2.3,"publicationDate":"2026-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146068508","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

How the grey bushchat combats parasitic eggs at different laying stages. 灰蚁如何在不同的产卵阶段对抗寄生卵。

IF 2.3 3区生物学

Journal of Evolutionary Biology Pub Date : 2026-04-02 DOI: 10.1093/jeb/voag009

Guo Zhong, Longwu Wang, Wei Liang

{"title":"How the grey bushchat combats parasitic eggs at different laying stages.","authors":"Guo Zhong, Longwu Wang, Wei Liang","doi":"10.1093/jeb/voag009","DOIUrl":"10.1093/jeb/voag009","url":null,"abstract":"Under the strong selective pressure of parasitism, hosts have evolved the strategy to recognize and reject parasitic eggs or chicks. Although studies have shown that hosts use multiple egg recognition mechanisms, it remains unclear whether they can flexibly deploy specific strategies across different parasitism contexts. Here, we explored the strategies of egg recognition and rejection of the grey bushchat (Saxicola ferreus), a host of the common cuckoo (Cuculus canorus), across different stages of egg-laying. The results indicated that the grey bushchat employed an \"onset of laying\" mechanism to recognize foreign eggs during the pre-laying stage, with significantly higher rejection rates in this period than post-laying. Additionally, the grey bushchat could remember the phenotype of its own eggs through a short learning process during the first egg-laying episode, without requiring physical presence of its own eggs in the nest. Furthermore, the host's rejection behaviour was shaped by the degree of egg mimicry and trade-offs associated with nest desertion costs. Our study reveals that the grey bushchat flexibly adopts distinct egg recognition and rejection strategies in response to varying parasitic contexts. Future research should incorporate individual variation in host reproductive background to better understand the evolution of plastic egg-recognition mechanisms.","PeriodicalId":50198,"journal":{"name":"Journal of Evolutionary Biology","volume":" ","pages":"552-560"},"PeriodicalIF":2.3,"publicationDate":"2026-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146203647","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

Genome size and phenotypic change: insights on contemporary evolution across biological groups. 基因组大小和表型变化：跨生物群体当代进化的见解。

IF 2.3 3区生物学

Journal of Evolutionary Biology Pub Date : 2026-04-02 DOI: 10.1093/jeb/voag005

Lucas D Gorné, Andrew P Hendry, Fanie Pelletier, Kiyoko M Gotanda

{"title":"Genome size and phenotypic change: insights on contemporary evolution across biological groups.","authors":"Lucas D Gorné, Andrew P Hendry, Fanie Pelletier, Kiyoko M Gotanda","doi":"10.1093/jeb/voag005","DOIUrl":"10.1093/jeb/voag005","url":null,"abstract":"Environmental changes threaten the persistence of wild populations and can drive adaptive phenotypic changes. However, predicting the phenotypic outcome of an environmental change based on features of the species remains challenging. Genome size has been linked to variables that could influence the amount and rate of phenotypic change on contemporary time-scales. Two contrasting hypotheses have been proposed. The first suggests that larger genome sizes are associated with greater amounts and rates of phenotypic change, due to increased genetic variance and phenotypic plasticity. The second suggests the opposite based on the negative effect of genome size on both generation time and cell duplication time. We tested these two hypotheses using the Phenotypic Rates of Change Evolutionary and Ecological Database. We analysed the relationships among genome size, phenotypic trait variability, mean trait change, and generation time. We found no support for the either of the tested hypotheses. Overall, the genome size explained less than 2% of the total variance in the amount of phenotypic change. In plants only, we found a consistent and negative effect of genome size on phenotypic change. However, we found no relationship between genome size and generation time, and we found no relationship between genome size and phenotypic variance. However, the consistent and relevant effect of phenotypic variance on the mean-scaled phenotypic change is worth highlighting from a conservation perspective because assessing the phenotypic variability of traits related to the niche breadth in different dimensions could inform us about the vulnerability of natural populations facing unexpected environmental changes.","PeriodicalId":50198,"journal":{"name":"Journal of Evolutionary Biology","volume":" ","pages":"509-522"},"PeriodicalIF":2.3,"publicationDate":"2026-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146041920","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

Differential investment in growth and reproduction optimizes a life-history trade-off in a species characterized by alternative reproductive tactics. 生长和繁殖方面的差异投资优化了以不同繁殖策略为特征的物种的生活史权衡。

IF 2.3 3区生物学

Journal of Evolutionary Biology Pub Date : 2026-04-02 DOI: 10.1093/jeb/voag004

Tomas O Cornwell, Bryan D Neff

{"title":"Differential investment in growth and reproduction optimizes a life-history trade-off in a species characterized by alternative reproductive tactics.","authors":"Tomas O Cornwell, Bryan D Neff","doi":"10.1093/jeb/voag004","DOIUrl":"10.1093/jeb/voag004","url":null,"abstract":"Alternative reproductive tactics often involve trade-offs between mating success and survival to sexual maturity, resulting in differential investment in shared traits driven by disruptive selection. Selection on intrinsic growth can lead to individuals optimizing mating success by delaying maturation, with others maturing precociously and at smaller sizes. Such trade-offs can continue post maturation and may differ between tactics or life histories. To examine differential investment in growth and reproduction, we explored relationships between body length and reproductive success in cuckolders, and compared body length and intrinsic growth in male (cuckolder vs parental) bluegill sunfish, Lepomis macrochirus. Reproductive success in cuckolders was highest at smaller (sneaker) and larger (satellite) body sizes. Cuckolders were larger than parentals in the first two years of life but not from year 3 onward, and growth trajectories varied significantly between cuckolder and parental life histories. Despite the early size advantage, cuckolders grew slower during early age transitions (1+→2+, 2+→3 + years), likely reflecting investment in sexual maturation. In subsequent years (3+→4 + and 4+→5+), cuckolders showed comparable growth to parentals despite parentals remaining immature. Cuckolders thus appear to persist through a phase of lower reproductive success at intermediate sizes by differentially investing in growth. Our results suggest that the alternative reproductive tactics in bluegill are driven in part by body size at age 1, with larger body size being a prerequisite for precocial maturation (adoption of the cuckolder life history). After initial investment in sexual maturation, cuckolders then re-prioritize growth during body sizes associated with lower reproductive success.","PeriodicalId":50198,"journal":{"name":"Journal of Evolutionary Biology","volume":" ","pages":"499-508"},"PeriodicalIF":2.3,"publicationDate":"2026-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146031450","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

Chromosomal diversification and evolutionary trajectories in Neotropical spiny rats: the first karyotype of Echimys chrysurus Zimmermann, 1780 and a comparative synthesis across Echimyidae. 新热带棘大鼠的染色体多样化和进化轨迹：1780年棘大鼠第一核型和棘大鼠科的比较合成。

IF 2.3 3区生物学

Journal of Evolutionary Biology Pub Date : 2026-04-02 DOI: 10.1093/jeb/voaf151

Willam Oliveira da Silva, Leony Dias de Oliveira, Yan Farias Anselmo, Jéssica Barata da Silva, Ana Cristina Mendes-Oliveira, Halicia Celeste Santos de Oliveira, Julio Cesar Pieczarka, Cleusa Yoshiko Nagamachi

{"title":"Chromosomal diversification and evolutionary trajectories in Neotropical spiny rats: the first karyotype of Echimys chrysurus Zimmermann, 1780 and a comparative synthesis across Echimyidae.","authors":"Willam Oliveira da Silva, Leony Dias de Oliveira, Yan Farias Anselmo, Jéssica Barata da Silva, Ana Cristina Mendes-Oliveira, Halicia Celeste Santos de Oliveira, Julio Cesar Pieczarka, Cleusa Yoshiko Nagamachi","doi":"10.1093/jeb/voaf151","DOIUrl":"10.1093/jeb/voaf151","url":null,"abstract":"Echimyidae, the largest family of Hystricognathi rodents, comprises 28 genera and 103 species across South and Central America and shows significant karyotypic variation, with diploid numbers (2n) from 14 to 118 and autosomal fundamental numbers (FNa) from 14 to 168. However, eight genera still lack karyotype descriptions. This study describes the karyotype of Echimys chrysurus from Amazonian Brazil (Paragominas and Santa Bárbara do Pará), using G-banding, C-banding, and FISH with telomeric and 18S rDNA probes. The species has a 2n = 80/FNa = 134 karyotype. The autosomal set consists of 28 meta/submetacentric pairs (1-28) and 11 acrocentric pairs (29-39); the X chromosome is a large acrocentric and the Y chromosome is a small acrocentric. Constitutive heterochromatin is centromeric in all autosomes and the X. Telomeric probe signals are distal, and the 18S rDNA probe shows a single interstitial signal. Review of 118 published karyotypes (66 species, 20 genera) integrated with multilocus phylogeny reveals bidirectional chromosomal evolution from an inferred ancestral karyotype (2n ≈ 60), through multiple lineage-specific Robertsonian translocations, centric fissions, and pericentric inversions. Arboreal Echimyini have higher 2n values, while several terrestrial or semifossorial taxa display marked reductions; these changes align with Miocene-Pliocene dispersals, Andean uplift, and habitat transitions to canopy, open areas, and flooded forests, suggesting rapid chromosomal change and speciation driven by ecological and geographic factors.","PeriodicalId":50198,"journal":{"name":"Journal of Evolutionary Biology","volume":" ","pages":"437-450"},"PeriodicalIF":2.3,"publicationDate":"2026-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145806271","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

Absence of cytoplasmic incompatibility and high vertical Wolbachia transmission in a neotropical drosophilid. 新热带果蝇细胞质不相容和高垂直沃尔巴克氏体传播的缺失。

IF 2.3 3区生物学

Journal of Evolutionary Biology Pub Date : 2026-04-02 DOI: 10.1093/jeb/voag002

Marina Magalhães Moreira, Luísa de Paula Bouzada Dias, Yoan Camilo Guzman, Letícia Carlesso de Paula Sena, João Paulo Pereira de Almeida, Karla Yotoko

{"title":"Absence of cytoplasmic incompatibility and high vertical Wolbachia transmission in a neotropical drosophilid.","authors":"Marina Magalhães Moreira, Luísa de Paula Bouzada Dias, Yoan Camilo Guzman, Letícia Carlesso de Paula Sena, João Paulo Pereira de Almeida, Karla Yotoko","doi":"10.1093/jeb/voag002","DOIUrl":"10.1093/jeb/voag002","url":null,"abstract":"Intracellular endosymbionts such as Wolbachia are generally thought to persist in host populations by inducing reproductive phenotypes that enhance maternal transmission, often at the expense of male hosts. Here, we examined the fitness consequences of the Wolbachia strain wStv in Drosophila sturtevanti, a highly abundant Neotropical drosophilid. Samples from 2015 and 2016 showed that all individuals from the nearby sampled populations carried Wolbachia, suggesting the induction of a phenotype capable of maintaining high infection levels. We therefore established isofemale lines from a local population and used one of them in controlled crosses between infected and treated flies to assess symbiont-induced changes in reproduction within a single genetic background. Contrary to expectations, we detected no cytoplasmic incompatibility or other reproductive manipulation. Instead, infection decreased female fecundity and decreased larvae production in crosses with treated males. Additional samplings in 2019 and 2022 showed that the infection persists in the population, and wsp sequencing confirmed that all infections detected from 2015 to 2022 carried the same allele. We also found imperfect but high maternal transmission, which may help to explain both the high infection levels observed in 2015-16 and the persistence of the infection. Our findings provide a foundation for future studies seeking to understand this association more broadly. They also reveal that Neotropical host-symbiont interactions can involve unexpectedly complex dynamics, indicating that the processes traditionally used to explain Wolbachia persistence may not be sufficient in this system.","PeriodicalId":50198,"journal":{"name":"Journal of Evolutionary Biology","volume":" ","pages":"472-484"},"PeriodicalIF":2.3,"publicationDate":"2026-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145999362","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