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Artykuły w czasopismach na temat „Asexuel”

Autor: Grafiati

Data publikacji: 9 listopada 2024

Data aktualizacji: 31 lipca 2025

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1

Husser, Anne. "Le genre à l’épreuve de la métapsychologie." Dialogue 245, no. 3 (2024): 19–35. http://dx.doi.org/10.3917/dia.245.0019.

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Cet article aborde la question du genre en relisant les choses à la lumière du développement psychique de la sexualité de l’être humain. La métapsychologie ne répond pas à la question de savoir comment le sexe vient aux uns et aux autres ni à celle de savoir s’il devrait exister une sortie de la binarité masculin-féminin. Car, pour la métapsychologie, la pulsion sexuelle, présente dès le début, se constitue pour chacun non seulement à l’aune des deux genres connus : bisexualité psychique, mais également de manière multiple selon le sujet, son histoire. Tant au niveau de l’identité sexuée (masc

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Key, Adam. "The Silent A." Journal of Autoethnography 2, no. 4 (2021): 446–65. http://dx.doi.org/10.1525/joae.2021.2.4.446.

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This critical autoethnography explores experiences as an asexual cismale and the inherent tensions and struggles experienced in the dialectic between societal expectations of sexual desire as a man and the lack of sex drive characteristic of an asexual orientation. It explores the exclusion asexuals experience, as they occupy a third space between straightness and queerness, leaving them nowhere in either the gender or sexuality roles spectrums to truly call home. As asexuals exist in a space not often considered by heterosexual and queer individuals and asexual men exist between the tension o

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Tobler, M., and I. Schlupp. "Expanding the horizon: the Red Queen and potential alternatives." Canadian Journal of Zoology 86, no. 8 (2008): 765–73. http://dx.doi.org/10.1139/z08-056.

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The Red Queen hypothesis (RQH) is one of the most widely accepted hypotheses explaining the persistence of sexual reproduction despite its costs. It posits that sexual species, compared with asexuals, are more adept at countering parasites, because their per-generation recombination rate is higher. Despite theoretical support, current empirical studies have failed to provide unanimous support. Here, we suggest that future tests of the RQH should more thoroughly elucidate its underlying assumptions and potential alternative hypotheses. While the RQH predicts that negative frequency-dependent se

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Scheu, S., and B. Drossel. "Sexual reproduction prevails in a world of structured resources in short supply." Proceedings of the Royal Society B: Biological Sciences 274, no. 1614 (2007): 1225–31. http://dx.doi.org/10.1098/rspb.2007.0040.

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We present a model for the maintenance of sexual reproduction based on the availability of resources, which is the strongest factor determining the growth of populations. The model compares completely asexual species to species that switch between asexual and sexual reproduction (sexual species). Key features of the model are that sexual reproduction sets in when resources become scarce, and that at a given place only a few genotypes can be present at the same time. We show that under a wide range of conditions the sexual species outcompete the asexual ones. The asexual species win only when s

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Larose, Chloé, Darren J. Parker, and Tanja Schwander. "Fundamental and realized feeding niche breadths of sexual and asexual stick insects." Proceedings of the Royal Society B: Biological Sciences 285, no. 1892 (2018): 20181805. http://dx.doi.org/10.1098/rspb.2018.1805.

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The factors contributing to the maintenance of sex over asexuality in natural populations remain unclear. Ecological divergences between sexual and asexual lineages could help to maintain reproductive polymorphisms, at least transiently, but the consequences of asexuality for the evolution of ecological niches are unknown. Here, we investigated how niche breadths change in transitions from sexual reproduction to asexuality. We used host plant ranges as a proxy to compare the realized feeding niche breadths of five independently derived asexual Timema stick insect species and their sexual relat

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Riesch, Rüdiger, Ingo Schlupp, and Martin Plath. "Female sperm limitation in natural populations of a sexual/asexual mating complex ( Poecilia latipinna , Poecilia formosa )." Biology Letters 4, no. 3 (2008): 266–69. http://dx.doi.org/10.1098/rsbl.2008.0019.

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In sperm-dependent sexual/asexual mating systems, male mate choice is critical for understanding the mechanisms behind apparent stability observed in natural populations. The gynogenetic Amazon molly ( Poecilia formosa ) requires sperm from sexual males (e.g. Poecilia latipinna ) to trigger embryogenesis, but inheritance is strictly maternal. Consequently, males should try to avoid or reduce the cost of mating with asexuals. We investigated male mate choice by documenting the presence of sperm in natural populations and found that a higher proportion of sexual females had sperm than asexuals.

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Carranza, Juan, and Vicente Polo. "Sexual reproduction with variable mating systems can resist asexuality in a rock–paper–scissors dynamics." Royal Society Open Science 2, no. 7 (2015): 140383. http://dx.doi.org/10.1098/rsos.140383.

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While sex can be advantageous for a lineage in the long term, we still lack an explanation for its maintenance with the twofold cost per generation. Here we model an infinite diploid population where two autosomal loci determine, respectively, the reproductive mode, sexual versus asexual and the mating system, polygynous (costly sex) versus monogamous (assuming equal contribution of parents to offspring, i.e. non-costly sex). We show that alleles for costly sex can spread when non-costly sexual modes buffer the interaction between asexual and costly sexual strategies, even without twofold bene

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Amat, Isabelle, Jacques J. M. van Alphen, Alex Kacelnik, Emmanuel Desouhant, and Carlos Bernstein. "Adaptations to different habitats in sexual and asexual populations of parasitoid wasps: a meta-analysis." PeerJ 5 (September 12, 2017): e3699. http://dx.doi.org/10.7717/peerj.3699.

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BackgroundCoexistence of sexual and asexual populations remains a key question in evolutionary ecology. We address the question how an asexual and a sexual form of the parasitoidVenturia canescenscan coexist in southern Europe. We test the hypothesis that both forms are adapted to different habitats within their area of distribution. Sexuals inhabit natural environments that are highly unpredictable, and where density of wasps and their hosts is low and patchily distributed. Asexuals instead are common in anthropic environments (e.g., grain stores) where host outbreaks offer periods when egg-l

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Stelzer, Claus-Peter. "Does the avoidance of sexual costs increase fitness in asexual invaders?" Proceedings of the National Academy of Sciences 112, no. 29 (2015): 8851–58. http://dx.doi.org/10.1073/pnas.1501726112.

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The high prevalence of sexual reproduction is considered a paradox mainly for two reasons. First, asexuals should enjoy various growth benefits because they seemingly rid themselves of the many inefficiencies of sexual reproduction—the so-called costs of sex. Second, there seems to be no lack of asexual origins because losses of sexual reproduction have been described in almost every larger eukaryotic taxon. Current attempts to resolve this paradox concentrate on a few hypotheses that provide universal benefits that would compensate for these costs and give sexual reproduction a net advantage.

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Stelzer, Claus-Peter, and Jussi Lehtonen. "Diapause and maintenance of facultative sexual reproductive strategies." Philosophical Transactions of the Royal Society B: Biological Sciences 371, no. 1706 (2016): 20150536. http://dx.doi.org/10.1098/rstb.2015.0536.

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Facultative sex combines sexual and asexual reproduction in the same individual (or clone) and allows for a large diversity of life-history patterns regarding the timing, frequency and intensity of sexual episodes. In addition, other life-history traits such as a diapause stage may become linked to sex. Here, we develop a matrix modelling framework for addressing the cost of sex in facultative sexuals, in constant, periodic and stochastically fluctuating environments. The model is parametrized using life-history data from Brachionus calyciflorus , a facultative sexual rotifer in which sex and

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Choleva, Lukáš, Apostolos Apostolou, Petr Ráb, and Karel Janko. "Making it on their own: sperm-dependent hybrid fishes ( Cobitis ) switch the sexual hosts and expand beyond the ranges of their original sperm donors." Philosophical Transactions of the Royal Society B: Biological Sciences 363, no. 1505 (2008): 2911–19. http://dx.doi.org/10.1098/rstb.2008.0059.

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Interspecific hybridization may result in asexual hybrid lineages that reproduce via parthenogenesis. Contrary to true parthenogens, sperm-dependent asexuals (gynogens and hybridogens) are restricted to the range of bisexual species, generally the parental taxa, by their need for a sperm donor. It has been documented that asexual lineages may rarely use sperm from a non-parental species or even switch a host. The available literature reports do not allow distinguishing, between whether such host switches arise by the expansion of asexuals out of their parental's range (and into that of another

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12

Schwander, Tanja, Bernard J. Crespi, Regine Gries, and Gerhard Gries. "Neutral and selection-driven decay of sexual traits in asexual stick insects." Proceedings of the Royal Society B: Biological Sciences 280, no. 1764 (2013): 20130823. http://dx.doi.org/10.1098/rspb.2013.0823.

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Environmental shifts and lifestyle changes may result in formerly adaptive traits becoming non-functional or maladaptive. The subsequent decay of such traits highlights the importance of natural selection for adaptations, yet its causes have rarely been investigated. To study the fate of formerly adaptive traits after lifestyle changes, we evaluated sexual traits in five independently derived asexual lineages, including traits that are specific to males and therefore not exposed to selection. At least four of the asexual lineages retained the capacity to produce males that display normal court

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BSc, Erin Hampson. "Negotiating (in)visibility: A phenomenological analysis of asexual students’ experiences of university." Psychology of Sexualities Review 11, no. 1 (2020): 26–41. http://dx.doi.org/10.53841/bpssex.2020.11.1.26.

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Asexuality research is an emerging topic and understanding gained through the perspectives of asexuals offer insights into how asexuality is experienced within social contexts. This exploratory study sought to understand the everyday experiences of self-identified asexuals within university contexts, the challenges they face and the ways in which these are understood and navigated. Four participants, attending UK universities, were recruited through lesbian, gay, bisexual, trans, queer, intersex and asexual (LGBTQIA+) Facebook groups. Data was collected through photo-elicitation interviews and

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Orr, H. Allen. "The Rate of Adaptation in Asexuals." Genetics 155, no. 2 (2000): 961–68. http://dx.doi.org/10.1093/genetics/155.2.961.

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Abstract I study the population genetics of adaptation in asexuals. I show that the rate of adaptive substitution in an asexual species or nonrecombining chromosome region is a bell-shaped function of the mutation rate: at some point, increasing the mutation rate decreases the rate of substitution. Curiously, the mutation rate that maximizes the rate of adaptation depends solely on the strength of selection against deleterious mutations. In particular, adaptation is fastest when the genomic rate of mutation, U, equals the harmonic mean of selection coefficients against deleterious mutations, w

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Auld, Stuart K. J. R., Shona K. Tinkler, and Matthew C. Tinsley. "Sex as a strategy against rapidly evolving parasites." Proceedings of the Royal Society B: Biological Sciences 283, no. 1845 (2016): 20162226. http://dx.doi.org/10.1098/rspb.2016.2226.

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Why is sex ubiquitous when asexual reproduction is much less costly? Sex disrupts coadapted gene complexes; it also causes costs associated with mate finding and the production of males who do not themselves bear offspring. Theory predicts parasites select for host sex, because genetically variable offspring can escape infection from parasites adapted to infect the previous generations. We examine this using a facultative sexual crustacean, Daphnia magna, and its sterilizing bacterial parasite, Pasteuria ramosa . We obtained sexually and asexually produced offspring from wild-caught hosts and

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Krois, Nicole R., Anvesh Cherukuri, Nikhil Puttagunta, and Maurine Neiman. "Higher rate of tissue regeneration in polyploid asexual versus diploid sexual freshwater snails." Biology Letters 9, no. 4 (2013): 20130422. http://dx.doi.org/10.1098/rsbl.2013.0422.

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Characterizing phenotypic differences between sexual and asexual organisms is a critical step towards understanding why sexual reproduction is so common. Because asexuals are often polyploid, understanding how ploidy influences phenotype is directly relevant to the study of sex and will provide key insights into the evolution of ploidy-level variation. The well-established association between genome size and cell cycle duration, evidence for a link between genome size and tissue regeneration rate and the growing body of research showing that ploidy influences growth rate and gene expression le

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Schön, Isa, Fernando Rodriguez, Matthew Dunn, Koen Martens, Michael Shribak, and Irina R. Arkhipova. "A Survey of Transposon Landscapes in the Putative Ancient Asexual Ostracod Darwinula stevensoni." Genes 12, no. 3 (2021): 401. http://dx.doi.org/10.3390/genes12030401.

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How asexual reproduction shapes transposable element (TE) content and diversity in eukaryotic genomes remains debated. We performed an initial survey of TE load and diversity in the putative ancient asexual ostracod Darwinula stevensoni. We examined long contiguous stretches of DNA in clones from a genomic fosmid library, totaling about 2.5 Mb, and supplemented these data with results on TE abundance and diversity from an Illumina draft genome. In contrast to other TE studies in putatively ancient asexuals, which revealed relatively low TE content, we found that at least 19% of the fosmid data

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Stöck, Matthias, Dmitrij Dedukh, Radka Reifová, Dunja K. Lamatsch, Zuzana Starostová, and Karel Janko. "Sex chromosomes in meiotic, hemiclonal, clonal and polyploid hybrid vertebrates: along the ‘extended speciation continuum'." Philosophical Transactions of the Royal Society B: Biological Sciences 376, no. 1833 (2021): 20200103. http://dx.doi.org/10.1098/rstb.2020.0103.

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We review knowledge about the roles of sex chromosomes in vertebrate hybridization and speciation, exploring a gradient of divergences with increasing reproductive isolation (speciation continuum). Under early divergence, well-differentiated sex chromosomes in meiotic hybrids may cause Haldane-effects and introgress less easily than autosomes. Undifferentiated sex chromosomes are more susceptible to introgression and form multiple (or new) sex chromosome systems with hardly predictable dominance hierarchies. Under increased divergence, most vertebrates reach complete intrinsic reproductive iso

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Hörandl, Elvira. "Geographical Parthenogenesis in Alpine and Arctic Plants." Plants 12, no. 4 (2023): 844. http://dx.doi.org/10.3390/plants12040844.

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The term “Geographical parthenogenesis” describes the phenomenon that asexual organisms usually occupy larger and more northern distribution areas than their sexual relatives, and tend to colonize previously glaciated areas. Several case studies on alpine and arctic plants confirm the geographical pattern, but the causal factors behind the phenomenon are still unclear. Research of the last decade in several plant families has shed light on the question and evaluated some of the classical evolutionary theories. Results confirmed, in general, that the advantages of uniparental reproduction enabl

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Wilson, Christopher G., and Paul W. Sherman. "Spatial and temporal escape from fungal parasitism in natural communities of anciently asexual bdelloid rotifers." Proceedings of the Royal Society B: Biological Sciences 280, no. 1765 (2013): 20131255. http://dx.doi.org/10.1098/rspb.2013.1255.

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Sexual reproduction is costly, but it is nearly ubiquitous among plants and animals, whereas obligately asexual taxa are rare and almost always short-lived. The Red Queen hypothesis proposes that sex overcomes its costs by enabling organisms to keep pace with coevolving parasites and pathogens. If so, the few cases of stable long-term asexuality ought to be found in groups whose coevolutionary interactions with parasites are unusually weak. In theory, antagonistic coevolution will be attenuated if hosts disperse among patches within a metapopulation separately from parasites and more rapidly.

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Boyer, Loreleï, Roula Jabbour-Zahab, Pauline Joncour, Sylvain Glémin, Christoph R. Haag, and Thomas Lenormand. "Asexual male production by ZW recombination in Artemia parthenogenetica." Evolution 77, no. 1 (2022): 1–12. http://dx.doi.org/10.1093/evolut/qpac008.

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Abstract In some asexual species, parthenogenetic females occasionally produce males, which may strongly affect the evolution and maintenance of asexuality if they cross with related sexuals and transmit genes causing asexuality to their offspring (“contagious parthenogenesis”). How these males arise in the first place has remained enigmatic, especially in species with sex chromosomes. Here, we test the hypothesis that rare, asexually produced males of the crustacean Artemia parthenogenetica are produced by recombination between the Z and W sex chromosomes during non-clonal parthenogenesis, re

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Przybylo, E., and D. Cooper. "Asexual Resonances: Tracing a Queerly Asexual Archive." GLQ: A Journal of Lesbian and Gay Studies 20, no. 3 (2014): 297–318. http://dx.doi.org/10.1215/10642684-2422683.

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Kolarčik, Vladislav, Valéria Kocová, Vlastimil Mikoláš, Lenka Mártonfiová, Nikola Hajdučeková, and Pavol Mártonfi. "Variability of Reproduction Pathways in the Central-European Populations of Hawthorns with Emphasis on Triploids." Plants 11, no. 24 (2022): 3497. http://dx.doi.org/10.3390/plants11243497.

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The role of apomeiosis, parthenogenesis, and pseudogamy in the asexual reproduction of some plant groups has not been fully elucidated in relation to species diversification. Quantitative analyses of seed origin may help in gaining better understanding of intercytotypic interactions. Asexual reproduction associated with polyploidy and frequent hybridization plays a crucial role in the evolutionary history of the genus Crataegus in North America. In Europe, the genus represents a taxonomically complex and very difficult species group not often studied using a modern biosystematic approach. We i

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Kuttin, E. S., W. Kaplan, H. I. Scholer, H. Burtscher, and H. Köhler. "Sexual and Asexual Reproduction of Aspergillus nidulans in vivo: Sexuelle und asexuelle Reproduktion von Aspergillus nidulans in vivo." Mycoses 28, no. 3 (2009): 109–16. http://dx.doi.org/10.1111/j.1439-0507.1985.tb02103.x.

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Grosberg, Richard K., and Roger N. Hughes. "Asexual Obsessions." Evolution 46, no. 6 (1992): 1976. http://dx.doi.org/10.2307/2410050.

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Shoubridge, Eric A. "Asexual healing." Nature 461, no. 7262 (2009): 354–55. http://dx.doi.org/10.1038/461354a.

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MCCONNELL, J. "Asexual cycle." Lancet 344, no. 8914 (1994): 53. http://dx.doi.org/10.1016/s0140-6736(94)91073-1.

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Grosberg, Richard K. "ASEXUAL OBSESSIONS." Evolution 46, no. 6 (1992): 1976–79. http://dx.doi.org/10.1111/j.1558-5646.1992.tb01188.x.

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Blichfeldt, Bodil Stilling, and Karina M. Smed. "‘Do it Forever’: Discursive representations of older adults and sexualities in vacation marketing." Journal of Vacation Marketing 25, no. 2 (2018): 264–76. http://dx.doi.org/10.1177/1356766718771421.

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In advertising, sex has been ascribed a major role, but mostly in a one-dimensional, uniform, and ageist manner framing sexuality as the privilege of younger people. This has traditionally strengthened stereotyping discourses of older adults as ‘asexual’. However, in recent years, counter narratives emphasizing sex as an integral part of active, healthy, and successful aging have gained momentum. Using the promotional video ‘Do it Forever’ as a relevant case, this article analyzes representations of older adults’ sexualities in vacation marketing and points to how advertising is not ‘innocent’

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Mee, J. A., and E. B. Taylor. "The cybrid invasion: widespread postglacial dispersal by Phoxinus (Pisces: Cyprinidae) cytoplasmic hybrids." Canadian Journal of Zoology 90, no. 5 (2012): 577–84. http://dx.doi.org/10.1139/z2012-023.

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Peculiar reproductive processes that arise during sperm-dependent asexual reproduction may have important roles in allowing coexistence of sperm-dependent asexuals and their sexually reproducing hosts. Though typically clonal, nonclonal reproduction in the hybrid gynogenetic species Phoxinus eos–neogaeus can reestablish sexual northern redbelly dace ( Phoxinus eos (Cope, 1861)) nuclear genomes. These hybrid-derived P. eos biotypes, known as cybrids, have finescale dace ( Phoxinus neogaeus Cope, 1867) mitochondria but are otherwise indistinguishable from “pure” P. eos. Our goal was to determine

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Orr, H. A., and S. P. Otto. "Does diploidy increase the rate of adaptation?" Genetics 136, no. 4 (1994): 1475–80. http://dx.doi.org/10.1093/genetics/136.4.1475.

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Abstract Explanations of the evolution of diploidy have focused on the advantages gained from masking deleterious alleles. Recent theory has shown, however, that masking does not always provide an advantage to diploidy and would never favor diploidy in predominantly asexual organisms. We explore a neglected alternative theory which posits that, by doubling the genome size, diploids double the rate at which favorable mutations arise. Consequently, the rate of adaptation in diploids is presumed to be faster than in haploids. The rate of adaptation, however, depends not only on the rate of appear

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Vallejo-Marin, Mario. "Correlation between polyploidy and asexual reproduction." Ecosistemas 23, no. 3 (2014): 78–82. http://dx.doi.org/10.7818/ecos.2014.23-3.10.

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李亭萱, 李亭萱, та 李明峰 Ting-Hsuan Lee. "臺灣無性戀身分認同歷程之研究". 中華輔導與諮商學報 67, № 67 (2023): 045–82. http://dx.doi.org/10.53106/172851862023050067003.

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<p>本研究旨在瞭解臺灣無性戀身分認同歷程，以及情感與性慾樣貌，邀請六位無性戀受訪者進行訪談，資料分析採敘事研究「類別&mdash;內容」視無性戀為一主體，進行跨個案資料分析。研究發現六位受訪者雖有共同經驗，但個別差異極大，身分認同之前，可幽微感受「性慾」或「情感」與有性戀存在著些微差異，分別以不在意、保持困惑、合理化與病理化面對差異。認同路徑從「契機」開始區分為二，其一是認同契機經歷「足夠強度的內外在刺激，同時有意識於無性戀一詞展開探究，並浸潤於個人情感與性慾經驗，經過多次來回反覆思辯」，進而有無性戀認同；其二為認同契機經驗「輕輕置入，快快連結，便有意識對無性戀一詞展開探究」，即有無性戀認同。另外，無性戀情感與性慾呈現多元樣貌，情感呈現樣貌包含：（1）對「任何事物」皆無感；（2）我不知道什麼是「忌妒」；（3）我只是很喜歡這個朋友；（4）太靠近的關係讓人窒息；（5）相當非常熱愛一件事。以及性慾呈現樣貌包含：（1）性幻想：無、第三者角度看性互動、虛擬二次元；（2）肢體碰觸：拒絕&mdash;接受；（3）關於自慰：純粹生理層次；（4）性行為：抗性&mdash;可接受；（5）電影呈現情慾的反應。最後，提出對未來研究與實務建議。</p> <p>&nbsp;</p><p>With the evolut

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李亭萱, 李亭萱. "臺灣無性戀現身經驗之初探". 輔導與諮商學報 46, № 1 (2024): 025–49. http://dx.doi.org/10.53106/181815462024054601002.

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<p>本研究旨在探究臺灣無性戀現身經驗，邀請6位無性戀者進行訪談，不聚焦單一現身對象，以開放地態度蒐集與探究資料，以「敘事研究取向」視框進行資料分析，試圖理解無性戀之現身經驗為何？研究結果有三：（一）無性戀能見度低影響現身經驗，包含需要解釋「什麼是無性戀」、現身是多次反覆全面性的行動、難以被理解；（二）臺灣同性婚姻對於無性戀現身經驗獨具意義，包含評估欲現身對象的酷兒知能與開放度、實踐社會正義、大幅降低被病理化的思維；（三）向伴侶現身尤為挑戰，包含避免錯誤期待、考量現身風險。最後，依據研究結果與文獻對話給予未來研究與實務建議，包含（一）研究建議：聚焦於無性戀像伴侶現身議題；（二）實務建議：在教育或教學現場，提供教師與學生「無性戀」概念，以提升無性戀的能見度；在諮商實務的現場，實務工作者要積極反思自身的「性價值觀」，以及擴展「性相關議題」之視框，除了增加對各個性傾向關注度之外，必須胸懷性少數的多樣性，避免先入為主的刻板印象，才不致在助人工作的成效上陷入盲點與困境，對性少數與臺灣整體社會有所貢獻。</p> <p>&nbsp;</p><p>The purpose of this study is to explore the disclosure experience of Taiwan asexual by interv

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Yan, Zhi-Chao, Guang-Yuan Qi, Tian-Yi Yao, and Yuan-Xi Li. "Mitochondrial Genomes of Two Asexual Trichogramma (Hymenoptera: Trichogrammatidae) Strains and Comparison with Their Sexual Relatives." Insects 13, no. 6 (2022): 549. http://dx.doi.org/10.3390/insects13060549.

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Despite its substantial costs, sexual reproduction dominates in animals. One popular explanation for the paradox of sex is that asexual reproduction is more likely to accumulate deleterious mutations than sexual reproduction. To test this hypothesis, we compared the mitogenomes of two asexual wasp strains, Trichogramma cacoeciae and T. pretiosum, to their sexual relatives. These two asexual strains represent two different transition mechanisms in Trichogramma from sexual to asexual reproduction. Asexual T. pretiosum is induced by Wolbachia, while T. cacoeciae presumably originated from intersp

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Whitton, Jeannette, Christopher J. Sears, and Wayne P. Maddison. "Co-occurrence of related asexual, but not sexual, lineages suggests that reproductive interference limits coexistence." Proceedings of the Royal Society B: Biological Sciences 284, no. 1868 (2017): 20171579. http://dx.doi.org/10.1098/rspb.2017.1579.

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We used randomizations to analyse patterns of co-occurrence of sexual and apomictic (asexual) members of the North American Crepis agamic complex (Asteraceae). We expect strong asymmetry in reproductive interactions in Crepis : apomicts produce clonal seeds with no need for pollination and are not subject to reproductive interference from co-occurring relatives. However, because they still produce some viable pollen, apomicts can reduce reproductive success of nearby sexual relatives, potentially leading to eventual local exclusion of sexuals. Consistent with this, randomizations reveal that s

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Judson, Olivia P., and Benjamin B. Normark. "Ancient asexual scandals." Trends in Ecology & Evolution 11, no. 2 (1996): 41–46. http://dx.doi.org/10.1016/0169-5347(96)81040-8.

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Meirmans, P. G., H. C. M. Den Nijs, and P. H. Van Tienderen. "Male sterility in triploid dandelions: asexual females vs asexual hermaphrodites." Heredity 96, no. 1 (2005): 45–52. http://dx.doi.org/10.1038/sj.hdy.6800750.

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Cuevas-Cruz, Juan Carlos, Marcos Jiménez-Casas, Jesús Jasso-Mata, Paulino Pérez-Rodríguez, Javier López-Uptón, and Ángel Villegas-Monter. "Asexual propagation of Pinus leiophylla Schiede ex Schltdl. et Cham." Revista Chapingo Serie Ciencias Forestales y del Ambiente XXI, no. 1 (2015): 81–95. http://dx.doi.org/10.5154/r.rchscfa.2014.08.033.

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Chen, Guanhan. "Research on the Development Path of Feminism from an Aromantic Asexual Perspective." Journal of Gender, Culture and Society 4, no. 2 (2024): 34–38. http://dx.doi.org/10.32996/jgcs.2024.4.2.5.

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Aromantic asexual is a perspective that has rarely been used in the research of Feminism, and this paper aims to explore the possibility and significance of combining aromantic asexual and feminism to fight against “sexual hegemony” from the perspective of the social identity of aromantic asexual. This paper will carry out research through the following aspects: firstly, analyse the concept of aromantic asexual and clarify its connotation and characteristics; secondly, explore the historical basis of the combination of aromantic asexual and feminism and reveal the links and commonalities betwe

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Constable, George W. A., and Hanna Kokko. "Parthenogenesis and the Evolution of Anisogamy." Cells 10, no. 9 (2021): 2467. http://dx.doi.org/10.3390/cells10092467.

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Recently, it was pointed out that classic models for the evolution of anisogamy do not take into account the possibility of parthenogenetic reproduction, even though sex is facultative in many relevant taxa (e.g., algae) that harbour both anisogamous and isogamous species. Here, we complement this recent analysis with an approach where we assume that the relationship between progeny size and its survival may differ between parthenogenetically and sexually produced progeny, favouring either the former or the latter. We show that previous findings that parthenogenesis can stabilise isogamy relat

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Sun, Yanxia, Xu Zhang, Aidi Zhang, et al. "Population Genomic Analyses Suggest a Hybrid Origin, Cryptic Sexuality, and Decay of Genes Regulating Seed Development for the Putatively Strictly Asexual Kingdonia uniflora (Circaeasteraceae, Ranunculales)." International Journal of Molecular Sciences 24, no. 2 (2023): 1451. http://dx.doi.org/10.3390/ijms24021451.

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Asexual lineages are perceived to be short-lived on evolutionary timescales. Hence, reports for exceptional cases of putative ‘ancient asexuals’ usually raise questions about the persistence of such species. So far, there have been few studies to solve the mystery in plants. The monotypic Kingdonia dating to the early Eocene, contains only K. uniflora that has no known definitive evidence for sexual reproduction nor records for having congeneric sexual species, raising the possibility that the species has persisted under strict asexuality for a long period of time. Here, we analyze whole genom

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Mollet, Amanda L., and Brian R. Lackman. "Asexual Borderlands: Asexual Collegians’ Reflections on Inclusion Under the LGBTQ Umbrella." Journal of College Student Development 59, no. 5 (2018): 623–28. http://dx.doi.org/10.1353/csd.2018.0058.

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Fine, Julia Coombs. "From crushes to squishes." Journal of Language and Sexuality 12, no. 2 (2023): 145–72. http://dx.doi.org/10.1075/jls.22004.fin.

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Abstract Previous research on language, sexuality, and affect has focused primarily on the presence rather than the absence of desire. This analysis investigates the linguistic manifestations of non-desire on two subreddits: r/AskReddit and r/Asexual. Contrasting asexual redditors’ responses to threads such as When and how did you realize you were asexual? with straight, allosexual redditors’ responses to a thread titled Straight redditors, when did you realize you were straight?, I find that allosexual and asexual redditors’ responses differ in agency and emotionality. While straight allosexu

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Dolmatov, Igor Yu. "Asexual Reproduction in Holothurians." Scientific World Journal 2014 (2014): 1–13. http://dx.doi.org/10.1155/2014/527234.

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Aspects of asexual reproduction in holothurians are discussed. Holothurians are significant as fishery and aquaculture items and have high commercial value. The last review on holothurian asexual reproduction was published 18 years ago and included only 8 species. An analysis of the available literature shows that asexual reproduction has now been confirmed in 16 holothurian species. Five additional species are also most likely capable of fission. The recent discovery of new fissiparous holothurian species indicates that this reproduction mode is more widespread in Holothuroidea than previousl

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Howard, Russell J. "Asexual deviants take over." Nature 357, no. 6380 (1992): 647–48. http://dx.doi.org/10.1038/357647a0.

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Vielle Calzada, J. P., C. F. Crane, and D. M. Stelly. "Apomixis--The Asexual Revolution." Science 274, no. 5291 (1996): 1322–23. http://dx.doi.org/10.1126/science.274.5291.1322.

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Martinez, D. E., and J. S. Levinton. "Asexual metazoans undergo senescence." Proceedings of the National Academy of Sciences 89, no. 20 (1992): 9920–23. http://dx.doi.org/10.1073/pnas.89.20.9920.

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TRIPP, Erin A. "Is asexual reproduction an evolutionary dead end in lichens?" Lichenologist 48, no. 5 (2016): 559–80. http://dx.doi.org/10.1017/s0024282916000335.

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AbstractClassical hypotheses in lichenology predict pairs of species in which sexual lineages are ancestral and long-lived evolutionarily and that these give rise to derived, evolutionarily transient asexual lineages. Extensive phylogenetic information generated over the last 20 years regarding relationships within and among various groups of lichens makes possible an investigation of polarity and lability in reproductive mode across diverse clades. To test the long-held hypothesis of asexual reproduction as an evolutionary dead end in lichens, existing phylogenetic data from 23 studies were u

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Hall, Scott, David Knox, and I. Joyce Chang. "Out of the Shadow and Into the Light: New Data Comparing Asexual and Sexual Undergraduates." Journal of Positive Sexuality 7, no. 2 (2021): 63–77. http://dx.doi.org/10.51681/1.722.

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Drawing from a large dataset of over 13,000 college students, this research compared 75 self-identified asexual individuals with heterosexual, bisexual, and gay/lesbian undergraduates. The results revealed that asexual individuals were less likely to have engaged in sexual behaviors (oral sex, anal sex, friends with benefits, sexual intercourse, hooking up) than heterosexual, bisexual, and gay or lesbian individuals. Asexual and heterosexual individuals were similar in endorsing absolutist sexual values, having a lower willingness to cohabit, and reporting less likelihood of having masturbated

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