Evolution最新文献_第6页

Effect of assortative mating and sexual selection on polygenic barriers to gene flow. 分类交配和性选择对基因流动多基因障碍的影响。

IF 3.1 2区环境科学与生态学

Evolution Pub Date : 2025-05-09 DOI: 10.1093/evolut/qpaf047

Parvathy Surendranadh, Himani Sachdeva

{"title":"Effect of assortative mating and sexual selection on polygenic barriers to gene flow.","authors":"Parvathy Surendranadh, Himani Sachdeva","doi":"10.1093/evolut/qpaf047","DOIUrl":"https://doi.org/10.1093/evolut/qpaf047","url":null,"abstract":"Assortative mating and sexual selection are widespread in nature and can play an important role in speciation by facilitating the buildup and maintenance of reproductive isolation (RI). However, their contribution to genome-wide suppression of gene flow during RI is rarely quantified. Here, we consider a polygenic \"magic\" trait that is divergently selected across two populations connected by migration, while also serving as the basis of assortative mating, thus generating sexual selection on one or both sexes. We obtain theoretical predictions for divergence at individual trait loci by assuming that the effect of all other loci on any locus can be encapsulated via an effective migration rate, which bears a simple relationship to measurable fitness components of migrants and various early-generation hybrids. Our analysis clarifies how \"tipping points\" (characterized by an abrupt collapse of adaptive divergence) arise, and when assortative mating can shift the critical level of migration beyond which divergence collapses. We quantify the relative contributions of viability and sexual selection to genome-wide barriers to gene flow and discuss how these depend on existing divergence levels. Our results suggest that effective migration rates provide a useful way of understanding genomic divergence, even in scenarios involving multiple, interacting mechanisms of RI.","PeriodicalId":12082,"journal":{"name":"Evolution","volume":" ","pages":""},"PeriodicalIF":3.1,"publicationDate":"2025-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144101679","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

Different drivers of diversification for body elongation and limb reduction in convergently snake-like lizards. 趋同蛇形蜥蜴身体伸长和肢体减少多样化的不同驱动因素。

IF 3.1 2区环境科学与生态学

Evolution Pub Date : 2025-05-07 DOI: 10.1093/evolut/qpaf095

Maxwell T Olson, Philip J Bergmann

{"title":"Different drivers of diversification for body elongation and limb reduction in convergently snake-like lizards.","authors":"Maxwell T Olson, Philip J Bergmann","doi":"10.1093/evolut/qpaf095","DOIUrl":"https://doi.org/10.1093/evolut/qpaf095","url":null,"abstract":"Convergence is the evolution of similar phenotypes often due to similar selective pressures or constraints limiting evolutionary options. Snake-like morphologies, characterized by elongated bodies and reduced limbs, have evolved repeatedly among vertebrates, including numerous times in squamate reptiles (lizards and snakes). It has been suggested that elongation facilitates locomotion through substrates while limb reduction typically occurs in clade-specific patterns, but this has not been tested. We compared the fit of a series of habitat-specific and clade-specific models for the evolution of digits, phalanges. and trunk vertebrae in lizards. We found that species inhabiting fossorial and cluttered habitats differed in numbers of vertebrae, digits, and phalanges from species in other habitats. A model with habitat-specific rates fit best for vertebral evolution, with sand swimmers, litter dwellers, and burrowers having higher rates of vertebral evolution than non-fossorial taxa. However, we found digits and phalanges evolved in a clade-specific manner, with higher rates of limb evolution in certain clades. This suggests that limb reduction in snake-like lizards is dictated by clade-specific constraints. In contrast, fossoriality appears to relax functional constraints on vertebral number, facilitating body form diversification. These results suggest that the relaxation of constraints may be an additional mechanism for convergent evolution.","PeriodicalId":12082,"journal":{"name":"Evolution","volume":" ","pages":""},"PeriodicalIF":3.1,"publicationDate":"2025-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143992987","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 clonality window: relatedness and the group covariance effect in the evolution of division of labour. 克隆窗口：劳动分工进化中的亲缘性和群体协方差效应。

IF 3.1 2区环境科学与生态学

Evolution Pub Date : 2025-05-07 DOI: 10.1093/evolut/qpaf093

Kalyani Z Twyman, Andy Gardner

{"title":"The clonality window: relatedness and the group covariance effect in the evolution of division of labour.","authors":"Kalyani Z Twyman, Andy Gardner","doi":"10.1093/evolut/qpaf093","DOIUrl":"https://doi.org/10.1093/evolut/qpaf093","url":null,"abstract":"Cellular division of labour is closely associated with the emergence of organismality in the evolution of obligate multicellularity. Michod has suggested that a trade-off between viability and fecundity may-through a 'group covariance effect'-lead to a group's fitness being augmented above the average of its constituents' fitnesses, offering a first step towards division of labour and obligate multicellularity. However, it is difficult to see how a group's fitness could be different from the aggregate of its constituents. Here, we investigate the same fitness trade-off and its consequences for division of labour. We recover the covariance effect, revealing that it is a consequence of cells sharing the products of their labours and clarifying that the group's fitness remains equal to the aggregate of the fitnesses of its constituent cells. We show that the covariance effect imparts an inclusive-fitness benefit for cells that share, but that-all else being equal-natural selection favours sharing only when groupmates are genetically identical, yielding a 'clonality window'. Lastly, we find that sharing is a critical determinant as to whether division of labour is favoured by natural selection, such that the 'clonality window' is also a prerequisite for division of labour in Michod's trade-off scenario.","PeriodicalId":12082,"journal":{"name":"Evolution","volume":" ","pages":""},"PeriodicalIF":3.1,"publicationDate":"2025-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143980756","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

Sex ratio theory for facultative parthenogens: from fortuitously optimal stick insects to the origin of haplodiploidy in Hymenoptera. 兼性孤雌生殖的性别比理论：从偶然性的最佳节肢昆虫到膜翅目单倍体的起源。

IF 3.1 2区环境科学与生态学

Evolution Pub Date : 2025-05-07 DOI: 10.1093/evolut/qpaf066

Kora Klein, Hanna Kokko

{"title":"Sex ratio theory for facultative parthenogens: from fortuitously optimal stick insects to the origin of haplodiploidy in Hymenoptera.","authors":"Kora Klein, Hanna Kokko","doi":"10.1093/evolut/qpaf066","DOIUrl":"https://doi.org/10.1093/evolut/qpaf066","url":null,"abstract":"Sex ratio theory usually assumes obligate sex; rare exceptions with facultative sex typically consider idiosyncratic cases of cyclic parthenogens. Here, we construct a general, theoretical framework for facultative parthenogens. We show that facultative partheno-genesis selects for female-biased sex ratios by elevating the class reproductive value of, females. The degree of this bias depends on the future rate of parthenogenesis. This, complicates calculations for cyclic parthenogens, but in stable environments (with stable rates of parthenogenesis), the optimal sex ratio can result automatically from constraints caused by preexisting sex chromosomes: if sexually produced offspring retain, unbiased sex ratios while parthenogenetically produced offspring are female (example: stick insects), optimality is achieved for any rate of parthenogenesis. Conversely, in birds, and haplodiploids, parthenogenesis produces males, resulting in suboptimal sex ratios., Nevertheless, male-producing parthenogenesis can invade and reach an equilibrium frequency, if the reproductive value of parthenogenetically produced brood is compromised, by less than 50%. We argue that this condition is not met in birds due to inviable WW, and homozygous ZZ offspring. For haplodiploids, on the other hand, our work resurrects a somewhat forgotten idea by Bull (1981) that haplodiploidy in Hymenoptera, evolved from a diplodiploid ancestor with complementary sex determination.","PeriodicalId":12082,"journal":{"name":"Evolution","volume":" ","pages":""},"PeriodicalIF":3.1,"publicationDate":"2025-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143990567","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

Retraction and Replacement of: 'The evolution of suppressed recombination between sex chromosomes and the lengths of evolutionary strata'. 撤回和替换：“性染色体间抑制重组的进化与进化层的长度”。

IF 3.1 2区环境科学与生态学

Evolution Pub Date : 2025-05-06 DOI: 10.1093/evolut/qpaf063

引用次数: 0

The evolution of suppressed recombination between sex chromosomes and the lengths of evolutionary strata. 性染色体间抑制重组的演化与进化层的长度。

IF 3.1 2区环境科学与生态学

Evolution Pub Date : 2025-05-06 DOI: 10.1093/evolut/qpaf045

Colin Olito, Jessica K Abbott

{"title":"The evolution of suppressed recombination between sex chromosomes and the lengths of evolutionary strata.","authors":"Colin Olito, Jessica K Abbott","doi":"10.1093/evolut/qpaf045","DOIUrl":"https://doi.org/10.1093/evolut/qpaf045","url":null,"abstract":"The idea that sex-differences in selection drive the evolution of suppressed recombination between sex chromosomes is well-developed in population genetics. Yet, despite a now classic body of theory, empirical evidence that sexually antagonistic (SA) selection drives the evolution of recombination arrest remains equivocal and alternative hypotheses underdeveloped. Here, we investigate whether the length of \"evolutionary strata\" formed by chromosomal inversions (or other large-effect recombination modifiers) expanding the nonrecombining sex-linked region (SLR) on sex chromosomes can be informative of how selection influenced their fixation. We develop population genetic models to show how the length of an SLR-expanding inversion and the presence of partially recessive deleterious mutational variation affect the fixation probability of three different classes of inversions: (i) intrinsically neutral, (ii) directly beneficial (i.e., due to breakpoint or positional effects), and (iii) those capturing SA loci. Our models indicate that inversions capturing an SA locus initially in linkage disequilibrium with the ancestral SLR exhibit a strong fixation bias toward small inversions, while neutral, beneficial, and inversions capturing a genetically unlinked SA locus tend to favor larger inversions and exhibit similar distributions of fixed inversion lengths. The footprint of evolutionary stratum size left behind by different selection regimes is strongly influenced by parameters affecting the deleterious mutation load, the physical position of the ancestral SLR, and the distribution of new inversion lengths.","PeriodicalId":12082,"journal":{"name":"Evolution","volume":" ","pages":""},"PeriodicalIF":3.1,"publicationDate":"2025-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143991298","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

Hybridization, reinforcement selection and sex-dependent reproductive character displacement of sperm and egg recognition proteins. 精子和卵子识别蛋白的杂交、强化选择和性别依赖的生殖特征位移。

IF 3.1 2区环境科学与生态学

Evolution Pub Date : 2025-05-04 DOI: 10.1093/evolut/qpaf092

Don R Levitan, Yueling Hao

{"title":"Hybridization, reinforcement selection and sex-dependent reproductive character displacement of sperm and egg recognition proteins.","authors":"Don R Levitan, Yueling Hao","doi":"10.1093/evolut/qpaf092","DOIUrl":"https://doi.org/10.1093/evolut/qpaf092","url":null,"abstract":"The establishment of reproductive isolation between species via gametic incompatibility initially requires within-species selection for variation in reproductive compatibility. We investigate how the generation of within-species variation in sperm and egg recognition proteins, potentially via sexual conflict, influences reproductive isolation between two partially sympatric sea urchin species; the North American west coast Mesocentrotus franciscanus and the circumpolar Strongylocentrotus droebachiensis. Barriers to hybridization are stronger when eggs are given a choice of conspecific versus heterospecific sperm and the variation in hybridization among crosses can be explained by whether the sperm or egg protein variant is ancestral or derived. Derived proteins can be recognized as different and prevent hybridization. Examination of the allele frequencies of these proteins in M. franciscanus in and out of sympatry with S. droebachiensis along the west coast of North America reveals evidence of reinforcement selection and reproductive character displacement in eggs but not sperm, which likely reflects the differential cost of hybridization for males and females.","PeriodicalId":12082,"journal":{"name":"Evolution","volume":" ","pages":""},"PeriodicalIF":3.1,"publicationDate":"2025-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143958187","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

Open ecosystems expansion, competition and predation shaped the evolution of Antilocapridae. 开放生态系统的扩张、竞争和捕食塑造了Antilocapridae的进化。

IF 3.1 2区环境科学与生态学

Evolution Pub Date : 2025-05-04 DOI: 10.1093/evolut/qpaf091

João C S Nascimento, Mathias M Pires

{"title":"Open ecosystems expansion, competition and predation shaped the evolution of Antilocapridae.","authors":"João C S Nascimento, Mathias M Pires","doi":"10.1093/evolut/qpaf091","DOIUrl":"https://doi.org/10.1093/evolut/qpaf091","url":null,"abstract":"The roles of environmental changes and biotic interactions in influencing diversification has been subject of much debate. Disentangling those effects requires the use of adequate methods to characterize shifts in diversification rates in groups with rich diversification dynamics. Here, we analyze the diversification of a group of mammals with a single living member but a diverse past in North America, the Antilocapridae, to untangle the influence of environmental changes and biotic interactions in the clade's evolutionary history. We found evidence consistent with an environmentally driven replacement within the family, where the most recent subfamily, Antilocaprinae, would have displaced the earliest subfamily, Merycodontinae. C4 grassland expansion seems to have increased the speciation rate within subfamily Antilocaprinae, indirectly contributing to an increase in extinction rates of the Merycodontinae. We also find that proboscideans could have contributed to the decline in Merycodontinae by suppressing speciation. Further, we show that the recent rise in extinction of antilocaprids may be associated with the diversification of Felinae, which includes modern and extinct predators of antilocaprids. More than uncovering the role of competition and predation in shaping the diversification of the clade, our results highlight the complex ways in which both the environment and biotic interactions may determine the fate of biological groups.","PeriodicalId":12082,"journal":{"name":"Evolution","volume":" ","pages":""},"PeriodicalIF":3.1,"publicationDate":"2025-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143970471","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

Multiple genomic ancestries in the broom hare mark the complex biogeographic history of hares in the Iberian Peninsula. 扫把兔的多个基因组祖先标志着伊比利亚半岛野兔复杂的生物地理历史。

IF 3.1 2区环境科学与生态学

Evolution Pub Date : 2025-05-04 DOI: 10.1093/evolut/qpaf082

João Souto, João P Marques, Liliana Farelo, José Costa, João Queirós, Christian Pietri, Fernando Ballesteros, Paulo C Alves, Pierre Boursot, José Melo-Ferreira

{"title":"Multiple genomic ancestries in the broom hare mark the complex biogeographic history of hares in the Iberian Peninsula.","authors":"João Souto, João P Marques, Liliana Farelo, José Costa, João Queirós, Christian Pietri, Fernando Ballesteros, Paulo C Alves, Pierre Boursot, José Melo-Ferreira","doi":"10.1093/evolut/qpaf082","DOIUrl":"https://doi.org/10.1093/evolut/qpaf082","url":null,"abstract":"Pleistocene climatic fluctuations have often driven range shifts and hybridization among related species, leaving present-day genomic footprints. In the Iberian Peninsula, repeated and transient post-glacial contacts among hare species has left extensive mitochondrial DNA traces, but the genomic correlates and underlying biogeographic scenarios are still incompletely understood. Here, we study genome admixture in the broom hare, Lepus castroviejoi, endemic to the Cantabrian region, using its non-Iberian sister species, L. corsicanus, for contrast. Coalescent analyses of 10 genomes estimate that these species remained isolated since their divergence around 50,000 years ago, consistent with their current allopatry. Further analyses with 25 additional genomes indicate that small fractions of the L. castroviejoi genome originate from L. granatensis, L. timidus, and L. europaeus (0.72%, 0.08%, and 0.04%, respectively). Introgression dating based on tract lengths suggests L. granatensis was already admixed with L. timidus when it hybridized with L. castroviejoi, which could explain granatensis-timidus ancestry tract junctions detected in L. castroviejoi. Genomic segments with such junctions contain genes enriched for cell signaling and olfactory receptor activity, suggesting functional drivers facilitating genetic exchange. This research demonstrates that genomic ancestry inferences can reveal complex multiway admixture histories, which can be used to illuminate complex past biogeographic events.","PeriodicalId":12082,"journal":{"name":"Evolution","volume":" ","pages":""},"PeriodicalIF":3.1,"publicationDate":"2025-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143974307","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

Heroic heirs: evidence for sexy and competitive sons. 英勇的继承人：性感好胜的儿子的证据。

IF 3.1 2区环境科学与生态学

Evolution Pub Date : 2025-05-02 DOI: 10.1093/evolut/qpaf089

Nirjana Dewan, W Jason Kennington, Joseph L Tomkins, Robert J Dugand

{"title":"Heroic heirs: evidence for sexy and competitive sons.","authors":"Nirjana Dewan, W Jason Kennington, Joseph L Tomkins, Robert J Dugand","doi":"10.1093/evolut/qpaf089","DOIUrl":"https://doi.org/10.1093/evolut/qpaf089","url":null,"abstract":"Leks are the quintessential example of female mate choice, yet male-male interactions at leks may predominate. How, and how much, female mate choice versus male-male competition contribute to precopulatory sexual selection, including whether they are aligned or antagonistic, matters to theory and our understanding of how selection acts on both males and females. For example, if male-male competition predominates and selection favours harmful, dominant males, then female and population fitness may be compromised. Here, using Drosophila melanogaster, we performed two artificial selection experiments in parallel where we altered selection to favour male-male competition (selection for winners and losers in multi-male competition trials) or female mate choice (selection for winners and losers in single-male latency trials). After seven generations of artificial selection, males from winner-selected lines were more competitive than males from loser-selected lines, regardless of the competitive context in which they were selected. There was also a trend suggesting that males from winner-selected lines were also more attractive. Our results support the idea that the outcomes of male-male competition and female choice are aligned, and/or that one process overrides the other.","PeriodicalId":12082,"journal":{"name":"Evolution","volume":" ","pages":""},"PeriodicalIF":3.1,"publicationDate":"2025-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144063030","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