Journal of Evolutionary Biology最新文献_第2页

Inbreeding reduces the ability of young to exploit high-resource nurseries. 近亲繁殖降低了幼崽利用资源丰富的苗圃的能力。

IF 2.1 3区生物学

Journal of Evolutionary Biology Pub Date : 2025-05-22 DOI: 10.1093/jeb/voaf062

Matthew Schrader

{"title":"Inbreeding reduces the ability of young to exploit high-resource nurseries.","authors":"Matthew Schrader","doi":"10.1093/jeb/voaf062","DOIUrl":"https://doi.org/10.1093/jeb/voaf062","url":null,"abstract":"Parents of many species create a \"nursery\" in which young develop, and variation in this environment can influence offspring phenotype and fitness. Recent studies have demonstrated that behavioral interactions within these nurseries may moderate inbreeding depression. However, whether other features of the nursery impact inbreeding depression, either directly or through secondary impacts on behavior, has been less well studied. Here I describe two experiments involving the burying beetle, Nicrophorus orbicollis, in which I test (1) whether inbreeding depression is sensitive to the size of the carcass that constitutes the nursery, and (2) whether inbreeding and carcass size influence parental care behavior. In the first experiment, I found that resource abundance in the nursey impacted inbreeding depression in larval mass, a trait that determines adult body size and competitive ability. In low-resource nurseries, inbred and outbred offspring did not differ in mass. However, in high resource nurseries inbred larvae were smaller than outbred larvae. This inbreeding-by-environment interaction occurred because the mass of outbred larvae was more responsive to resource abundance than the mass of inbred larvae. Larval survival from dispersal to eclosion exhibited inbreeding depression that was independent of resource abundance. In the second experiment, I found no evidence that the inability of inbred larvae to exploit high-resource nurseries was due to differences in parental behavior. These results suggest that inbred larvae are less able than outbred larvae to take advantage of high resource nurseries; however, further work is necessary to uncover the mechanisms generating this inbreeding-by-environment interaction.","PeriodicalId":50198,"journal":{"name":"Journal of Evolutionary Biology","volume":" ","pages":""},"PeriodicalIF":2.1,"publicationDate":"2025-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144129120","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

Asymmetric barriers to gene flow can maintain sex role differentiation upon secondary contact. 基因流动的不对称屏障可以维持二次接触后的性别角色分化。

IF 2.1 3区生物学

Journal of Evolutionary Biology Pub Date : 2025-05-19 DOI: 10.1093/jeb/voaf026

Elijah Reyes, Hope Klug, Leithen K M'Gonigle

{"title":"Asymmetric barriers to gene flow can maintain sex role differentiation upon secondary contact.","authors":"Elijah Reyes, Hope Klug, Leithen K M'Gonigle","doi":"10.1093/jeb/voaf026","DOIUrl":"https://doi.org/10.1093/jeb/voaf026","url":null,"abstract":"Acquiring a mate and providing parental care require substantial time and energy. Evolution typically favours allocating more effort to one of these actions at the expense of the other. Differences between the sexes in such allocation are common, with males investing more heavily in mate acquisition and females investing more heavily in parental care in systems with conventional sex roles and the converse pattern in sex-role-reversed systems. If populations diverge in sex roles, pre- or postmating incompatibilities may arise. For example, if different sexes provide parental care in different populations, interpopulation mating combinations may produce broods that receive little to no care, which could lead to low offspring survival. Here, we consider a two-patch model to ask whether variation in sex roles can persist upon secondary contact in populations that have diverged. We find that populations with sexes that are differently specialized in parental care versus sexual selection can, indeed, remain differentiated after secondary contact and, further, that the mechanism maintaining differentiation depends on the direction of dispersal. Importantly, however, whether populations remain diverged depends on both the model of mate acquisition and the resultant population dynamics (density dependence, mating rate, population size). These findings have potential implications for incipient speciation and the evolution of reproductive barriers.","PeriodicalId":50198,"journal":{"name":"Journal of Evolutionary Biology","volume":"38 5","pages":"594-605"},"PeriodicalIF":2.1,"publicationDate":"2025-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144103022","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

Adaptation for crypsis versus conspicuous social signalling following transitions across an extreme ecotone. 在极端过渡带过渡后，对隐隐的适应与明显的社会信号。

IF 2.1 3区生物学

Journal of Evolutionary Biology Pub Date : 2025-05-19 DOI: 10.1093/jeb/voaf025

Shizhi Yao, Terry J Ord

{"title":"Adaptation for crypsis versus conspicuous social signalling following transitions across an extreme ecotone.","authors":"Shizhi Yao, Terry J Ord","doi":"10.1093/jeb/voaf025","DOIUrl":"10.1093/jeb/voaf025","url":null,"abstract":"A key selection pressure in most habitats is predation, and a common strategy adopted by prey is crypsis through background matching. Many marine blenny fishes are in the process of a dramatic transition across one of the world's most extreme ecotones: the invasion of land across the intertidal zone. We investigated the impact of this transition on body crypsis versus the conspicuousness of visual signals across 56 blenny taxa relative to 59 biologically relevant backgrounds, as viewed by conspecifics and four representative fish and avian predators. We computed 33 colour and 23 pattern indices from standardised digital photographs of six individuals for each taxa (median sample). Six of these indices were selected for detailed analysis following phylogenetic Principal Component Analysis. While phylogenetic regressions revealed some aspects of body crypsis appeared to have changed adaptively with the progressive transition to land (specifically a reduction in body colour saturation), colonisation was primarily facilitated by a generalist form of crypsis. That is, the colours and patterns of aquatic blennies were already well matched to the range of terrestrial backgrounds where amphibious and terrestrial species were observed out of water. Predation appears to have been an important selection pressure constraining the colour and pattern of the dorsal fins used in social communication, which also matched visual backgrounds. Our data implies anti-predator strategies that translate well across habitats and different predator regimes will facilitate colonisation by either reducing predation risk or allowing species to persist long enough to respond adaptively to environmental change.","PeriodicalId":50198,"journal":{"name":"Journal of Evolutionary Biology","volume":" ","pages":"580-593"},"PeriodicalIF":2.1,"publicationDate":"2025-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143665265","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

Non-random sorting of parental chemical compounds during hybrid speciation. 杂交物种形成过程中亲本化合物的非随机分选。

IF 2.1 3区生物学

Journal of Evolutionary Biology Pub Date : 2025-05-19 DOI: 10.1093/jeb/voaf022

Paul Doniol-Valcroze, Lucie Develay Nguyen, Bruno Buatois, Stefan Dötterl, Roman Fuchs, Laurence Després, Mathieu Joron, Anne-Geneviève Bagnères

{"title":"Non-random sorting of parental chemical compounds during hybrid speciation.","authors":"Paul Doniol-Valcroze, Lucie Develay Nguyen, Bruno Buatois, Stefan Dötterl, Roman Fuchs, Laurence Després, Mathieu Joron, Anne-Geneviève Bagnères","doi":"10.1093/jeb/voaf022","DOIUrl":"10.1093/jeb/voaf022","url":null,"abstract":"The role of hybridization during speciation remains partially understood, yet introgression among lineages may trigger reproductive isolation (RI). Hybrid speciation may reveal how specific traits drive RI and how characters are sorted following admixture. Here, we study hybrid speciation in a complex of butterfly species (Coenonympha spp.) in which 2 hybrid lineages (C. darwiniana and C. cephalidarwiniana) received about 75% of their genomes from C. arcania, and 25% from C. gardetta. By contrast with their genomic ancestry compositions, hybrid lineages mate readily with their minor parent in contact zones, while the major parent shows nearly complete isolation from all lineages. To test whether hybrid speciation operated via the non-random sorting of traits acting as pre-zygotic barriers, we assessed chemical profile similarity between species using gas chromatography-mass spectrometry and contrasted it to genomic composition and natural patterns of hybridization. Both hybrid species exhibited profiles strikingly similar to their minor parent despite the genomic contribution of the major parent, matching predictions for isolating traits. This suggests that chemical traits were sorted non-randomly during hybrid speciation and that they contributed to RI from the major parent. Our results reveal how hybridization may trigger rapid speciation and underscore the significance of chemical signalling in shaping barriers among emerging species.","PeriodicalId":50198,"journal":{"name":"Journal of Evolutionary Biology","volume":" ","pages":"559-571"},"PeriodicalIF":2.1,"publicationDate":"2025-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143711928","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

Behavioural mimicry among poison frogs diverges during close-range encounters with predators. 在与捕食者的近距离接触中，毒蛙的行为模仿出现了分歧。

IF 2.1 3区生物学

Journal of Evolutionary Biology Pub Date : 2025-05-19 DOI: 10.1093/jeb/voaf038

James B Barnett, Brendan L McEwen, Isaac Kinley, Hannah M Anderson, Justin Yeager

{"title":"Behavioural mimicry among poison frogs diverges during close-range encounters with predators.","authors":"James B Barnett, Brendan L McEwen, Isaac Kinley, Hannah M Anderson, Justin Yeager","doi":"10.1093/jeb/voaf038","DOIUrl":"10.1093/jeb/voaf038","url":null,"abstract":"Aposematic species signal their unpalatability to potential predators with recognizable, and frequently conspicuous, colour patterns. These visual signals are often also associated with bold behaviour and a reduced propensity to escape from approaching predators. Bold behaviours may act as an aversive signal and allow defended prey to avoid the energetic/opportunity costs that arise from fleeing predators. For Batesian mimics, non-defended species which replicate the colours of defended models, behavioural mimicry may also improve mimic fidelity and reduce energetic/opportunity costs. However, as predators may test the honesty of aposematic signals through sampling behaviour, Batesian mimics can be at high risk during close-range interactions with predators. This raises the question of whether/when Batesian mimics should deviate from behavioural mimicry and initiate more extensive escape behaviour. Here, we exposed the chemically defended poison frog Ameerega bilinguis and its (non-toxic) Batesian mimic Allobates zaparo to a simulated predator encounter. We predicted Al. zaparo would escape to a greater distance and in a more erratic manner than Am. bilinguis. Yet, contrary to our predictions, Al. zaparo did not flee far from predators. It was, however, more likely to initiate escape prior to physical contact from the predator. We suggest that bold behaviour coupled with pre-emptive movement allows Al. zaparo to retain the benefits of behavioural mimicry while reducing the likelihood that predators will test signal honesty. Our data highlight that when examining the evolution of mimicry, we must consider both morphological and behavioural traits, as well as how risk to the prey may change how they behave throughout the predation sequence.","PeriodicalId":50198,"journal":{"name":"Journal of Evolutionary Biology","volume":" ","pages":"663-671"},"PeriodicalIF":2.1,"publicationDate":"2025-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143755606","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

Increases in predation favour evolutionary shifts in behavioural plasticity in Trinidadian killifish (Anablepsoides hartii). 捕食的增加有利于特立尼达鳉（Anablepsoides hartii）行为可塑性的进化转变。

IF 2.1 3区生物学

Journal of Evolutionary Biology Pub Date : 2025-05-19 DOI: 10.1093/jeb/voaf024

Meghan Korte, Matthew R Walsh

{"title":"Increases in predation favour evolutionary shifts in behavioural plasticity in Trinidadian killifish (Anablepsoides hartii).","authors":"Meghan Korte, Matthew R Walsh","doi":"10.1093/jeb/voaf024","DOIUrl":"10.1093/jeb/voaf024","url":null,"abstract":"Behavioural plasticity is expected to be favoured in risky environments, such as when prey species coexist with predators because prey must alternate between fitness-related foraging/mating behaviours and antipredator behaviours that enhance survival. We compared behavioural plasticity in Trinidadian killifish that are found in sites with and without predators. We quantified aggressive and antipredator behaviours via a mirror assay in second-generation lab-reared and wild-caught killifish before and after exposure to predator cues. We compared 2 types of aggression including: overt aggression (ramming, biting, lunging, and tail-slapping) and display aggression (spine arching, bending into an s-shape, and opercular flaring). We additionally compared the amount of time the fish spent frozen as a proxy for antipredator behaviour. We show clear differences in plasticity between populations with and without predators. Killifish from sites with predators decreased overt aggression in response to exposure to predator chemical cues. Plastic responses to the predator cue were lower in killifish from sites that lack predators. Interestingly, wild fish from sites without predators did respond to the predator cue by decreasing overt aggression and increasing time spent frozen, though to a lesser degree compared to the fish from sites with predators. Our results support the expectation that development in a risky environment favours evolutionary changes in predator-mediated behavioural plasticity.","PeriodicalId":50198,"journal":{"name":"Journal of Evolutionary Biology","volume":" ","pages":"572-579"},"PeriodicalIF":2.1,"publicationDate":"2025-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143702077","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

Few genetic loci control the green-brown colour polymorphism in the meadow grasshopper Pseudochorthippus parallelus. 控制草甸蚱蜢（Pseudochorthippus parallelus）绿褐色多态性的遗传位点很少。

IF 2.1 3区生物学

Journal of Evolutionary Biology Pub Date : 2025-05-19 DOI: 10.1093/jeb/voaf036

Mahendra Varma, Gabe Winter, Anne Ebeling, Angela Lehmann, Lilian Cabon, Octavio M Palacios-Gimenez, Nikhil Pratap, Holger Schielzeth

{"title":"Few genetic loci control the green-brown colour polymorphism in the meadow grasshopper Pseudochorthippus parallelus.","authors":"Mahendra Varma, Gabe Winter, Anne Ebeling, Angela Lehmann, Lilian Cabon, Octavio M Palacios-Gimenez, Nikhil Pratap, Holger Schielzeth","doi":"10.1093/jeb/voaf036","DOIUrl":"10.1093/jeb/voaf036","url":null,"abstract":"The green-brown polymorphism in Orthoptera is a prominent example of the coexistence of multiple colour variants, especially since this polymorphism is shared by many species. The processes that maintain phenotypic polymorphisms depend on the underlying genetic and developmental regulation of body colouration, but these are not well understood for Orthoptera. Here we report on the inheritance of the green-brown polymorphism in the meadow grasshopper Pseudochorthippus parallelus, a species with four discrete colour morphs that differ in the distribution of green colouration across the body. We provide the most detailed analysis of the green-brown polymorphism to date using half-sib full-sib breeding and phenotyping of 4,300 offspring. The data strongly support a simple Mendelian control of the presence/absence of green colour in different regions of the body, involving four autosomal loci, two of which are genetically linked. However, estimation of population allele and haplotype frequencies using probabilistic simulations shows weak linkage disequilibrium in the population. The contrast between pedigree and population linkage suggests the presence of long-standing allelic variation and thus corroborates that long-term balancing selection is acting. Our study confirms and extends our understanding of inheritance patterns within the Chorthippus clade, providing unprecedented insights into the number and linkage of loci involved. The results have implications for the maintenance of polymorphisms and suggest that fluctuations in the phenotypic composition of populations can be generated by the segregation of genetic variants even in the absence of fluctuating selection.","PeriodicalId":50198,"journal":{"name":"Journal of Evolutionary Biology","volume":" ","pages":"639-651"},"PeriodicalIF":2.1,"publicationDate":"2025-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143744164","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

The influence of relatedness on parental reproductive success and offspring fitness in Eastern chipmunks breeding in fluctuating environments. 波动环境下东方花栗鼠亲缘关系对亲代繁殖成功和后代适合度的影响。

IF 2.1 3区生物学

Journal of Evolutionary Biology Pub Date : 2025-05-19 DOI: 10.1093/jeb/voaf037

Juliette Frappier-Lecomte, Patrick Bergeron, Denis Réale, Carolyne Houle, Dany Garant

{"title":"The influence of relatedness on parental reproductive success and offspring fitness in Eastern chipmunks breeding in fluctuating environments.","authors":"Juliette Frappier-Lecomte, Patrick Bergeron, Denis Réale, Carolyne Houle, Dany Garant","doi":"10.1093/jeb/voaf037","DOIUrl":"10.1093/jeb/voaf037","url":null,"abstract":"Mate choice and multiple paternity have been widely studied in natural populations, especially in research assessing inbreeding avoidance mechanisms. Ecological factors are expected to affect the costs and benefits of mate choice and multiple paternity, for instance, through their effects on the availability of partners. However, the relative importance and variation of those costs/benefits across fluctuating environmental contexts remains to be established. Here, we used reproduction data collected over 18 years on a wild population of Eastern chipmunks (Tamias striatus) to assess the influence of relatedness among mating partners on their reproductive success and on their offspring fitness in different breeding contexts. In southern Québec, chipmunks live in a pulse resource system where they anticipate masting events of the American beech (Fagus grandifolia) and breed during the summer preceding and/or the spring following a mast. We found that, within a litter, less genetically related sires were assigned more offspring than more closely related ones. This relationship was significant during the summer breeding seasons only, which is characterized by high availability of food and mating partners in the environment. Multiple paternity was also more frequent during summer breeding than during spring breeding. We found no additional effect of parental relatedness on the juvenile survival, longevity, or reproductive success of their offspring. Our results could suggest the presence of context-specific inbreeding avoidance mechanisms by females or differential mortality of offspring at early stages linked to inbreeding depression. Altogether, our findings provide a better understanding of the influence of fluctuating environments on reproduction in small mammals.","PeriodicalId":50198,"journal":{"name":"Journal of Evolutionary Biology","volume":" ","pages":"652-662"},"PeriodicalIF":2.1,"publicationDate":"2025-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143755608","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

Genetic and habitat complexity effects on unpredictability in escape behaviour of a grasshopper species. 遗传和生境复杂性对蝗虫逃避行为不可预测性的影响。

IF 2.1 3区生物学

Journal of Evolutionary Biology Pub Date : 2025-05-19 DOI: 10.1093/jeb/voaf030

Gabe Winter, Holger Schielzeth

{"title":"Genetic and habitat complexity effects on unpredictability in escape behaviour of a grasshopper species.","authors":"Gabe Winter, Holger Schielzeth","doi":"10.1093/jeb/voaf030","DOIUrl":"10.1093/jeb/voaf030","url":null,"abstract":"The debate surrounding the role of genetic and environmental factors in shaping behaviour has a long tradition. However, their effects on complex behaviours such as unpredictability in anti-predator strategies remain poorly understood. Behaving unpredictably when escaping predators may increase the prey's chances of survival, especially when prey can rely on a complex habitat providing camouflage and shelter opportunities. We explored the effects of genetic and environmental influences on escape strategies of the steppe grasshopper Chorthippus dorsatus. Individuals from controlled breeding had been randomly assigned to one of two environmental complexity treatments during ontogeny. We then quantified escape behaviour in a large cohort through burst experiments. Using a multivariate double hierarchical animal model, we analysed the effects of pedigree and environmental complexity on both inter- and intra-individual variance in three components of escape behaviour: flight initiation distance (FID), jump distance, and jump angle. Habitat complexity affected average jump angle, but not the average FID or jump distance, nor unpredictability in any of the three traits. Pedigree relatedness accounted for 5%-6% of the total variance in average FID and average jump distance and 7% of the variance in unpredictability in jump angle. Genetic correlations suggest a behavioural syndrome structure in escape strategies that involve FID (a potential indicator of boldness). Our study demonstrates that unpredictability in escape behaviour has the potential to evolve by natural selection, as some of its components are heritable. Furthermore, we show that although habitat complexity represents a strong environmental treatment, its lasting effects during ontogeny on escape behaviour are minimal.","PeriodicalId":50198,"journal":{"name":"Journal of Evolutionary Biology","volume":" ","pages":"618-629"},"PeriodicalIF":2.1,"publicationDate":"2025-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143677400","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

Inheritance of somatic mutations can affect fitness in monkeyflowers. 体细胞突变的遗传可以影响猴花的适应性。

IF 2.1 3区生物学

Journal of Evolutionary Biology Pub Date : 2025-05-19 DOI: 10.1093/jeb/voaf033

Matthew A Streisfeld, Jessie C Crown, Jack J McLean, Aidan W Short, Mitchell B Cruzan

{"title":"Inheritance of somatic mutations can affect fitness in monkeyflowers.","authors":"Matthew A Streisfeld, Jessie C Crown, Jack J McLean, Aidan W Short, Mitchell B Cruzan","doi":"10.1093/jeb/voaf033","DOIUrl":"10.1093/jeb/voaf033","url":null,"abstract":"Plants have the ability to transmit mutations to progeny that arise through both meiotic and mitotic (somatic) cell divisions. This is because the same meristem cells responsible for vegetative growth will also generate gametes for sexual reproduction. Despite the potential for somatic mutations to contribute to genetic variation and adaptation, their role in plant evolution remains largely unexplored. We conducted experiments with the bush monkeyflower (Mimulus aurantiacus) to assess the phenotypic effects of somatic mutations inherited across generations. By generating self-pollinations within a flower (autogamy) or between flowers on different stems of the same plant (geitonogamy), we tracked the effects of somatic mutations transmitted to progeny. Autogamy and geitonogamy lead to different segregation patterns of somatic mutations among stems, with only autogamy resulting in offspring that are homozygous for somatic mutations specific to that stem. This allowed us to compare average phenotypic differences between pollination treatments that could be attributed to the inheritance of somatic variants. While most experimental units showed no impacts on fitness, in some cases, we detected increased seed production, as well as significant increases in drought tolerance, even though M. aurantiacus is already well adapted to drought conditions. We also found increased variance in drought tolerance following autogamy, consistent with the hypothesis that somatic mutations transmitted between generations can impact fitness. These results highlight the potential role of inherited somatic mutations as a relevant source of genetic variation in plant evolution.","PeriodicalId":50198,"journal":{"name":"Journal of Evolutionary Biology","volume":" ","pages":"630-638"},"PeriodicalIF":2.1,"publicationDate":"2025-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143736248","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