In a panmictic population of constant size N, random pairs of individuals will have a most recent shared ancestor who lived slightly more than 0.5 log<sub>2</sub>N generations previously, on average. The p...In a panmictic population of constant size N, random pairs of individuals will have a most recent shared ancestor who lived slightly more than 0.5 log<sub>2</sub>N generations previously, on average. The probability that a random pair of individuals will share at least one ancestor who lived 0.5 log<sub>2</sub>N generations ago, or more recently, is about 50%. Those individuals, if they do share an ancestor from that generation, would be cousins of degree (0.5 log<sub>2</sub>N) - 1. Shared ancestry from progressively earlier generations increases rapidly until there is universal pairwise shared ancestry. At that point, every individual has one or more ancestors in common with every other individual in the population, although different pairs may share different ancestors. Those ancestors lived approximately 0.7 log<sub>2</sub>N generations in the past, or more recently. Qualitatively, the ancestries of random pairs have about 50% similarity for ancestors who lived about 0.9 log<sub>2</sub>N generations before the present. That is, about half of the ancestors from that generation belonging to one member of the pair are present also in the genealogy of the other member. Qualitative pairwise similarity increases to more than 99% for ancestors who lived about 1.4 log<sub>2</sub>N generations in the past. Similar results apply to a metric of quantitative pairwise genealogical overlap.展开更多
Inferring network structures from available data has attracted much interest in network science;however,in many realistic networks,only some of the nodes are perceptible while others are hidden,making it a challenging...Inferring network structures from available data has attracted much interest in network science;however,in many realistic networks,only some of the nodes are perceptible while others are hidden,making it a challenging task.In this work,we develop a method for reconstructing the network with hidden nodes and links,taking account of fast-varying noise and time-delay interactions.By calculating the correlations of available data with different derivative orders for multiple pairs of accessible nodes,analyzing and integrating the relationships between different correlations,and defining diverse hidden-node-related reconstruction motifs,we can effectively identify the hidden nodes and hidden links in the network.展开更多
This article focuses on novels that,located on the boundary between biography,autobiography and fiction,between detailed archival historical research and imagination,between the documentary and the speculative,seek to...This article focuses on novels that,located on the boundary between biography,autobiography and fiction,between detailed archival historical research and imagination,between the documentary and the speculative,seek to reconstruct the life of an ancestor of the writer-narrator to reflect on the traumas,exploitation,hopes,and desires of generations who,in their diasporas,also helped create their modern nations,or whose story challenges the exclusions on which the concept of the nation has been built.The texts discussed are Melania Mazzucco's Vita,Vona Groarke's Hereafter:The Telling Life of Ellen O'Hara,Wu Ming 2 and Antar Mohamed's Timira:Romanzo Meticcio,and Maryse Conde's Victoire,les saveurs et les mots.At their center is the negotiation between the individual truth and the relational story across generations on the one hand,and,on the other hand,the tracing of collective histories such as those of nation,of colonization,of diaspora,of internal and external displacement,of rights and emancipation(the downtrodden,the poor,women,the migrant,the refugees),of the origins of dispossession and the permanence of its effects.At the core of the narratives is also the ghostliness of the erased(from history,from memory,from citizenship),the departed(in the sense of being dead and of having traveled away),and the in-between(generic:between the historical and documentary on the one hand,and the novelistic,the fable,fantasy on the other;geographical:between countries,between places,nationalities,national affiliations;historical:across generations;racial:the mestizo,the mulatto).It is,specifically,the biofictional imagination that enables these diasporic,transnational,transracial accounts to open up the possibility of a different,liberating future,by offering the space to imagine such a future,but also by recognizing,through its explicit acknowledgement of its recourse to fictionality,that it does not aim to construct a new myth to replace historical fact,but that it invites all of us to imagine,and strive to bring into exist展开更多
Although Sikkim belongs to one of the Global Biodiversity Hotspots,little is known about its ectomycorrhizal fungi,and even less about the main genera of Russulales,i.e.Lactarius,Lactifluus,Multifurca and Russula.Comb...Although Sikkim belongs to one of the Global Biodiversity Hotspots,little is known about its ectomycorrhizal fungi,and even less about the main genera of Russulales,i.e.Lactarius,Lactifluus,Multifurca and Russula.Combining a multilocus genealogical and morphological study,we aimed to document the diversity within Lactifluus volemus sensu lato of Sikkim Himalaya.We compared nuclear ITS and LSU rDNA,nuclear rpb1 and rpb2 protein-coding,and mitochondrial atp6 protein-coding genealogies to determine species boundaries.Interspecific relationships were inferred from the combined dataset.Bayesian and maximum likelihood single-locus genealogies are concordant and support recognition of six species.Three of these could be identified by unique morphological characteristics and are described as new species:L.dissitus,L.leptomerus and L.versiformis.展开更多
Resolving species delimitation issues of European Cantharellus is crucial to correctly name chanterelles around the globe.Thirty names referring to Cantharellus s.str.have been described in Europe,some of which are u...Resolving species delimitation issues of European Cantharellus is crucial to correctly name chanterelles around the globe.Thirty names referring to Cantharellus s.str.have been described in Europe,some of which are used in other continents.Based on combined analyses of ITS2,LSU,RPB2 and TEF-1,merely eight species are here recognized in Europe applying the genealogical concordance phylogenetic species recognition criteria,one of which,C.roseofagetorum,is described as new.Morphological characters used in species delimitation are mapped and their variability evaluated.The colour of the hymenophore in young specimens is found to be a rather constant morphological character of taxonomic use.European species of Cantharellus are morphologically distinguished by unique combinations of characters,such as the presence of a pink pileal coating,pileus and hymenophore colour when young,and in some cases,the mean spore length and ecology.Eighteen type specimens from Europe are sequenced.Based on revised species concepts sixteen novel taxonomic synonyms are here proposed for European chanterelles:C.alborufescens(=C.henrici,C.ilicis,C.lilacinopruinatus),C.amethysteus(=C.cibarius subsp.squamulosus,C.cibarius var.umbrinus,C.rufipes),C.cibarius(=C.cibarius var.atlanticus,C.parviluteus),C.ferruginascens(=C.cibarius var.flavipes),C.friesii(=C.ignescens),C.pallens(=C.cibarius var.albidus,C.cibarius var.bicolor,C.subpruinosus),and C.romagnesianus(=C.pseudominimus,C.lourizanianus,C.romagnesianus var.parvisporus).The type of Cantharellus,C.cibarius,is epitypified.Descriptions,colour illustrations and a key to all European species are provided.展开更多
Species of Ophiognomonia are leaf-inhabiting endophytes,pathogens,and saprobes that infect plants in the families Betulaceae,Fagaceae,Juglandaceae,Lauraceae,Malvaceae,Platanaceae,Rosaceae,Salicaceae,and Sapindaceae.Ba...Species of Ophiognomonia are leaf-inhabiting endophytes,pathogens,and saprobes that infect plants in the families Betulaceae,Fagaceae,Juglandaceae,Lauraceae,Malvaceae,Platanaceae,Rosaceae,Salicaceae,and Sapindaceae.Based on extensive collecting,this speciesrich genus is now known to have a world wide distribution in primarily temperate areas,although some species are known from the subtropics.Analyses of DNA sequences from three markers including guanine nucleotide-binding protein subunit beta-like protein(MS204),translation elongation factor 1α(tef-1α),and the ITS region including ITS1,5.8 S rDNA and ITS2 regions(ITS)were used to define phylogenetic species in Ophiognomonia.Host plant association correlated with these species.Twenty-five new species of Ophiognomonia and two new combinations are proposed with descriptions and illustrations.In addition,descriptions and illustrations are provided for 12 other species of Ophiognomonia.A key is provided to the 45 currently accepted species of Ophiognomonia.The disposition of additional names in Ophiognomonia is also discussed.展开更多
文摘In a panmictic population of constant size N, random pairs of individuals will have a most recent shared ancestor who lived slightly more than 0.5 log<sub>2</sub>N generations previously, on average. The probability that a random pair of individuals will share at least one ancestor who lived 0.5 log<sub>2</sub>N generations ago, or more recently, is about 50%. Those individuals, if they do share an ancestor from that generation, would be cousins of degree (0.5 log<sub>2</sub>N) - 1. Shared ancestry from progressively earlier generations increases rapidly until there is universal pairwise shared ancestry. At that point, every individual has one or more ancestors in common with every other individual in the population, although different pairs may share different ancestors. Those ancestors lived approximately 0.7 log<sub>2</sub>N generations in the past, or more recently. Qualitatively, the ancestries of random pairs have about 50% similarity for ancestors who lived about 0.9 log<sub>2</sub>N generations before the present. That is, about half of the ancestors from that generation belonging to one member of the pair are present also in the genealogy of the other member. Qualitative pairwise similarity increases to more than 99% for ancestors who lived about 1.4 log<sub>2</sub>N generations in the past. Similar results apply to a metric of quantitative pairwise genealogical overlap.
基金supported by the National Natural Science Foundation of China(Grant No.11835003)supported by the National Natural Science Foundation of China(Grant Nos.12375033,12235007,and 11975131)+7 种基金the Natural Science Foundation of Zhejiang(Grant No.LY23A050002)the K.C.Wong Magna Fund at Ningbo Universitysupported by the National Natural Science Foundation of China(Grant No.T2122016)the National Science and Technology Innovation 2030 Major Program(Grant Nos.2021ZD0203700,and 2021ZD0203705)the Fundamental Research Funds for the Central Universities(Grant No.2022CDJKYJH034)supported by the National Institutes of Health(Grant Nos.R01 HL134709,R01 HL139829,R01 HL157116,and P01 HL164311)supported by the National Natural Science Foundation of China(Grant No.11905291)CAS Project for Young Scientists in Basic Research(Grant No.YSBR-041)。
文摘Inferring network structures from available data has attracted much interest in network science;however,in many realistic networks,only some of the nodes are perceptible while others are hidden,making it a challenging task.In this work,we develop a method for reconstructing the network with hidden nodes and links,taking account of fast-varying noise and time-delay interactions.By calculating the correlations of available data with different derivative orders for multiple pairs of accessible nodes,analyzing and integrating the relationships between different correlations,and defining diverse hidden-node-related reconstruction motifs,we can effectively identify the hidden nodes and hidden links in the network.
文摘This article focuses on novels that,located on the boundary between biography,autobiography and fiction,between detailed archival historical research and imagination,between the documentary and the speculative,seek to reconstruct the life of an ancestor of the writer-narrator to reflect on the traumas,exploitation,hopes,and desires of generations who,in their diasporas,also helped create their modern nations,or whose story challenges the exclusions on which the concept of the nation has been built.The texts discussed are Melania Mazzucco's Vita,Vona Groarke's Hereafter:The Telling Life of Ellen O'Hara,Wu Ming 2 and Antar Mohamed's Timira:Romanzo Meticcio,and Maryse Conde's Victoire,les saveurs et les mots.At their center is the negotiation between the individual truth and the relational story across generations on the one hand,and,on the other hand,the tracing of collective histories such as those of nation,of colonization,of diaspora,of internal and external displacement,of rights and emancipation(the downtrodden,the poor,women,the migrant,the refugees),of the origins of dispossession and the permanence of its effects.At the core of the narratives is also the ghostliness of the erased(from history,from memory,from citizenship),the departed(in the sense of being dead and of having traveled away),and the in-between(generic:between the historical and documentary on the one hand,and the novelistic,the fable,fantasy on the other;geographical:between countries,between places,nationalities,national affiliations;historical:across generations;racial:the mestizo,the mulatto).It is,specifically,the biofictional imagination that enables these diasporic,transnational,transracial accounts to open up the possibility of a different,liberating future,by offering the space to imagine such a future,but also by recognizing,through its explicit acknowledgement of its recourse to fictionality,that it does not aim to construct a new myth to replace historical fact,but that it invites all of us to imagine,and strive to bring into exist
基金supported by the“Bijzonder Onderzoeksfonds Ghent University”(BOF)supported by the Research Foundation Flanders(FWO).
文摘Although Sikkim belongs to one of the Global Biodiversity Hotspots,little is known about its ectomycorrhizal fungi,and even less about the main genera of Russulales,i.e.Lactarius,Lactifluus,Multifurca and Russula.Combining a multilocus genealogical and morphological study,we aimed to document the diversity within Lactifluus volemus sensu lato of Sikkim Himalaya.We compared nuclear ITS and LSU rDNA,nuclear rpb1 and rpb2 protein-coding,and mitochondrial atp6 protein-coding genealogies to determine species boundaries.Interspecific relationships were inferred from the combined dataset.Bayesian and maximum likelihood single-locus genealogies are concordant and support recognition of six species.Three of these could be identified by unique morphological characteristics and are described as new species:L.dissitus,L.leptomerus and L.versiformis.
基金This study would not have been possible without numerous friends and colleagues that provided specimens or/and shared photographs and knowledge with us:M.Becerra,J.B.Blanco-Dios,E.Campo,A.Estades,R.Fernandez-Sasia,J.Fernandez Vicente,E.Fidalgo,J.Martin,A.Melendez,M.A`.PerezDe-Gregorio.B.Rodrıguez,E.Rubio,L.Rubio Casas,J.C.Salom,P.Siquier,J.Teres,S.Serrano and J.C.Zamora.We thank J.Rejos,curator of AH,for his patience and managing loans of herbarium material for this study.Likewise,we thank the curators of AMB(Associazione Micologica BresadolaG.Consiglio),DAOM(S.Redhead),E(D.Harris),K(B.Aguirre-Hudson),LOU-Fungi(J.B.Blanco-Dios),MPU(C.Loup),O(K.Bendiksen,K.-H.Larsson),PRM(J.Holec)and OSC(A.Liston).Roberto Fernandez Sasia and J.Mornand kindly made the types of C.parviluteus and C.cibarius var.flavipes available to us.We are much indebted to G.Eyssartier,who shared with us material,useful comments and was always collaborative.Pierre-Arthur Moreau and S.Poumarat made available scans of the original drawing of C.cibarius var.alborufescens.Jaume Llistosella gave us valuable information about R.Maire’s trip to Catalonia and the type localities of C.cibarius var.albidus and C.cibarius var.bicolor.Scott Redhead investigated in depth the priority date of the name Cantharellus rufipes and found that was published later(1888)than we believed(1878),which hindered us from making the unfortunate decision to adopt C.rufipes instead of the earlier and well-established C.amethysteus(1887).The first author thanks Luis A.Parra for making available his nomenclatural expertise at any time and help with literature search,and Maria Prieto for enriching discussions and valuable advise.We also acknowledge Massimo Candusso for providing literature.Eric Danell and Svengunnar Ryman showed I.Olariaga localities around Uppsala where fresh material of C.cibarius and C.pallens could be collected.I.Olariaga author also thanks A.Felipe for companionship during numerous field trips to collect Cantharellus material.This study has been partial
文摘Resolving species delimitation issues of European Cantharellus is crucial to correctly name chanterelles around the globe.Thirty names referring to Cantharellus s.str.have been described in Europe,some of which are used in other continents.Based on combined analyses of ITS2,LSU,RPB2 and TEF-1,merely eight species are here recognized in Europe applying the genealogical concordance phylogenetic species recognition criteria,one of which,C.roseofagetorum,is described as new.Morphological characters used in species delimitation are mapped and their variability evaluated.The colour of the hymenophore in young specimens is found to be a rather constant morphological character of taxonomic use.European species of Cantharellus are morphologically distinguished by unique combinations of characters,such as the presence of a pink pileal coating,pileus and hymenophore colour when young,and in some cases,the mean spore length and ecology.Eighteen type specimens from Europe are sequenced.Based on revised species concepts sixteen novel taxonomic synonyms are here proposed for European chanterelles:C.alborufescens(=C.henrici,C.ilicis,C.lilacinopruinatus),C.amethysteus(=C.cibarius subsp.squamulosus,C.cibarius var.umbrinus,C.rufipes),C.cibarius(=C.cibarius var.atlanticus,C.parviluteus),C.ferruginascens(=C.cibarius var.flavipes),C.friesii(=C.ignescens),C.pallens(=C.cibarius var.albidus,C.cibarius var.bicolor,C.subpruinosus),and C.romagnesianus(=C.pseudominimus,C.lourizanianus,C.romagnesianus var.parvisporus).The type of Cantharellus,C.cibarius,is epitypified.Descriptions,colour illustrations and a key to all European species are provided.
基金This project was funded by the National Science Foundation Partnerships for Enhancing Expertise in Taxonomy(NSF 03-28364).Additional funding for field work by DMW was received through Rutgers University,New Brunswick,NJ,from the C.Reed Funk Student Award by the Department of Plant Biology and Pathology,also the Backus Award and Everett Lutrell Mentor Student Travel Award from the Mycological Society of America.DMW also thanks Jo Anne Crouch and Adam Bazinet for assistance with data analyses,Kentaro Hosaka,Shinobu Inoue,Takao Kobayashi,Tsuyoshi Hosoya,Yousuke Degawa for hosting a collecting trip to Japan and Yuuri Hirooka for coordinating the visit,Christian Feuillet and Drew Minnis for discussions about nomenclature,Ryan Vo and Tunesha Phipps for technical assistance,and Larissa Vasilyeva,Alain Gardiennet,Yannick Mourgues,Marc Chovillon,Jacques Fornier,and Mikhail Sogonov for collection of fresh specimens for examination.
文摘Species of Ophiognomonia are leaf-inhabiting endophytes,pathogens,and saprobes that infect plants in the families Betulaceae,Fagaceae,Juglandaceae,Lauraceae,Malvaceae,Platanaceae,Rosaceae,Salicaceae,and Sapindaceae.Based on extensive collecting,this speciesrich genus is now known to have a world wide distribution in primarily temperate areas,although some species are known from the subtropics.Analyses of DNA sequences from three markers including guanine nucleotide-binding protein subunit beta-like protein(MS204),translation elongation factor 1α(tef-1α),and the ITS region including ITS1,5.8 S rDNA and ITS2 regions(ITS)were used to define phylogenetic species in Ophiognomonia.Host plant association correlated with these species.Twenty-five new species of Ophiognomonia and two new combinations are proposed with descriptions and illustrations.In addition,descriptions and illustrations are provided for 12 other species of Ophiognomonia.A key is provided to the 45 currently accepted species of Ophiognomonia.The disposition of additional names in Ophiognomonia is also discussed.
