解剖学和形态学
麻醉学
听力与言语-语言病理学
行为科学
心脏和心血管系统
细胞和组织工程学
临床神经病学
危重症监护医学
牙科,口腔外科和医学
皮肤病学
急诊医学
内分泌学和新陈代谢
肠胃学和肝脏学
老人病学和老年医学
卫生保健科学和服务
血液学
免疫学
传染病
综合和补充性医学
医学伦理学
医学信息学
医学实验室技术
医学,全科和内科
医学,法律
医学,研究和试验
神经系统科学
护理
营养学和饮食学
产科医学和妇科医学
肿瘤学
眼科学
整形外科学
耳鼻喉科学
病理学
儿科学
周围血管疾病
药理学和药剂学
生理学
基本医疗保健
精神病学
公共、环境和职业卫生
放射学,核医学和医学成像
康复学
生殖生物学
呼吸系统
风湿病学
运动科学
外科学
毒理学
热带医学
泌尿学和肾脏学
病毒学
老年医学
健康政策和服务
心理学,临床
abstract::Anthozoan cnidarians (corals and sea anemones) include some of the world's most important foundation species, capable of building massive reef complexes that support entire ecosystems. Although previous molecular phylogenetic analyses have revealed widespread homoplasy of the morphological characters traditionally use...
journal_title:Systematic biology
pub_type: 杂志文章
doi:10.1093/sysbio/syaa103
更新日期:2021-01-28 00:00:00
abstract::Evidence from natural systems suggests that hybridization between animal species is more common than traditionally thought, but the overall contribution of introgression to standing genetic variation within species remains unclear for most animal systems. Here, we use targeted exon-capture to sequence thousands of nuc...
journal_title:Systematic biology
pub_type: 杂志文章
doi:10.1093/sysbio/syaa085
更新日期:2021-01-07 00:00:00
abstract::It is common for studies that employ the comparative method for the study of adaptation, i.e. documentation of potentially adaptive across-species patterns of trait-environment or trait-trait correlation, to be designated as "macroevolutionary." Authors are justified in using "macroevolution" in this way by appeal to ...
journal_title:Systematic biology
pub_type: 杂志文章
doi:10.1093/sysbio/syaa086
更新日期:2021-01-07 00:00:00
abstract::The spatial distribution of biomes has changed considerably over deep time, so the geographical opportunity for an evolutionary lineage to shift into a new biome may depend on how the availability and connectivity of biomes has varied temporally. To better understand how lineages shift between biomes in space and time...
journal_title:Systematic biology
pub_type: 杂志文章
doi:10.1093/sysbio/syaa045
更新日期:2021-01-01 00:00:00
abstract::The insect order Psocodea is a diverse lineage comprising both parasitic (Phthiraptera) and non-parasitic members (Psocoptera). The extreme age and ecological diversity of the group may be associated with major genomic changes, such as base compositional biases expected to affect phylogenetic inference. Divergent morp...
journal_title:Systematic biology
pub_type: 杂志文章
doi:10.1093/sysbio/syaa075
更新日期:2020-09-26 00:00:00
abstract::Understanding how gene flow affects population divergence and speciation remains challenging. Differentiating one evolutionary process from another can be difficult because multiple processes can produce similar patterns, and more than one process can occur simultaneously. While simple population models produce predic...
journal_title:Systematic biology
pub_type: 杂志文章
doi:10.1093/sysbio/syaa071
更新日期:2020-09-17 00:00:00
abstract::Phylogenomic and paleontological data constitute complementary resources for unravelling the phylogenetic relationships and divergence times of lineages, yet few studies have attempted to fully integrate them. Several unique properties of echinoids (sea urchins) make them especially useful for such synthetizing approa...
journal_title:Systematic biology
pub_type: 杂志文章
doi:10.1093/sysbio/syaa069
更新日期:2020-09-03 00:00:00
abstract::In recent years, there has been controversy whether multidimensional data such as geometric morphometric data or information on gene expression can be used for estimating phylogenies. This study uses simulations of evolution in multidimensional phenotype spaces to address this question and to identify specific factors...
journal_title:Systematic biology
pub_type: 杂志文章
doi:10.1093/sysbio/syaa003
更新日期:2020-09-01 00:00:00
abstract::Sampling across tree space is one of the major challenges in Bayesian phylogenetic inference using Markov chain Monte Carlo (MCMC) algorithms. Standard MCMC tree moves consider small random perturbations of the topology, and select from candidate trees at random or based on the distance between the old and new topolog...
journal_title:Systematic biology
pub_type: 杂志文章
doi:10.1093/sysbio/syaa002
更新日期:2020-09-01 00:00:00
abstract::Population structure influences genealogical patterns, however, data pertaining to how populations are structured are often unavailable or not directly observable. Inference of population structure is highly important in molecular epidemiology where pathogen phylogenetics is increasingly used to infer transmission pat...
journal_title:Systematic biology
pub_type: 杂志文章
doi:10.1093/sysbio/syaa009
更新日期:2020-09-01 00:00:00
abstract::The Amazon and neighboring South American river basins harbor the world's most diverse assemblages of freshwater fishes. One of the most prominent South American fish families is the Serrasalmidae (pacus and piranhas), found in nearly every continental basin. Serrasalmids are keystone ecological taxa, being some of th...
journal_title:Systematic biology
pub_type: 杂志文章
doi:10.1093/sysbio/syaa065
更新日期:2020-08-12 00:00:00
abstract::The analysis of time-resolved phylogenies (timetrees) and geographic location data allows estimation of dispersal rates, for example for invasive species and infectious diseases. Many estimation methods are based on the Brownian Motion model for diffusive dispersal on a 2-dimensional plane, however the accuracy of the...
journal_title:Systematic biology
pub_type: 杂志文章
doi:10.1093/sysbio/syaa061
更新日期:2020-07-29 00:00:00
abstract::Genome-scale data have the potential to clarify phylogenetic relationships across the tree of life, but have also revealed extensive gene tree conflict. This seeming paradox, whereby larger datasets both increase statistical confidence and uncover significant discordance, suggests that understanding sources of conflic...
journal_title:Systematic biology
pub_type: 杂志文章
doi:10.1093/sysbio/syaa054
更新日期:2020-07-18 00:00:00
abstract::Mouse lemurs (Microcebus) are a radiation of morphologically cryptic primates distributed throughout Madagascar for which the number of recognized species has exploded in the past two decades. This taxonomic revision has prompted understandable concern that there has been substantial oversplitting in the mouse lemur c...
journal_title:Systematic biology
pub_type: 杂志文章
doi:10.1093/sysbio/syaa053
更新日期:2020-07-08 00:00:00
abstract::Phylogenomic analyses have helped resolve many recalcitrant relationships in the angiosperm tree of life, yet phylogenetic resolution of the backbone of the Leguminosae, one of the largest and most economically and ecologically important families, remains poor due to generally limited molecular data and incomplete tax...
journal_title:Systematic biology
pub_type: 杂志文章
doi:10.1093/sysbio/syaa013
更新日期:2020-07-01 00:00:00
abstract::Genomic data have had a profound impact on nearly every biological discipline. In systematics and phylogenetics, the thousands of loci that are now being sequenced can be analyzed under the multispecies coalescent model (MSC) to explicitly account for gene tree discordance due to incomplete lineage sorting (ILS). Howe...
journal_title:Systematic biology
pub_type: 杂志文章
doi:10.1093/sysbio/syz056
更新日期:2020-05-01 00:00:00
abstract::We address some of the taxonomic and classification changes proposed by Kuntner et al. (2019) in a comparative study on the evolution of sexual size dimorphism in nephiline spiders. Their proposal to recircumscribe araneids and to rank the subfamily Nephilinae as a family is fundamentally flawed as it renders the fami...
journal_title:Systematic biology
pub_type: 杂志文章
doi:10.1093/sysbio/syz043
更新日期:2020-03-01 00:00:00
abstract::Evolutionary relationships have remained unresolved in many well-studied groups, even though advances in next-generation sequencing and analysis, using approaches such as transcriptomics, anchored hybrid enrichment, or ultraconserved elements, have brought systematics to the brink of whole genome phylogenomics. Recent...
journal_title:Systematic biology
pub_type: 杂志文章
doi:10.1093/sysbio/syz030
更新日期:2020-01-01 00:00:00
abstract::Stochastic birth-death models provide the foundation for studying and simulating evolutionary trees in phylodynamics. A curious feature of such models is that they exhibit fundamental symmetries when the birth and death rates are interchanged. In this article, we first provide intuitive reasons for these known transfo...
journal_title:Systematic biology
pub_type: 杂志文章
doi:10.1093/sysbio/syz039
更新日期:2019-09-01 00:00:00
abstract::Modeling discrete phenotypic traits for either ancestral character state reconstruction or morphology-based phylogenetic inference suffers from ambiguities of character coding, homology assessment, dependencies, and selection of adequate models. These drawbacks occur because trait evolution is driven by two key proces...
journal_title:Systematic biology
pub_type: 杂志文章
doi:10.1093/sysbio/syz005
更新日期:2019-09-01 00:00:00
abstract::Species are the starting point for most studies of ecology and evolution, but the proper circumscription of species can be extremely difficult in morphologically variable lineages, and there are still few convincing examples of molecularly informed species delimitation in plants. Here, we focus on the Viburnum nudum c...
journal_title:Systematic biology
pub_type: 杂志文章
doi:10.1093/sysbio/syy084
更新日期:2019-03-01 00:00:00
abstract::Rapidly evolving pathogens, such as viruses and bacteria, accumulate genetic change at a similar timescale over which their epidemiological processes occur, such that, it is possible to make inferences about their infectious spread using phylogenetic time-trees. For this purpose it is necessary to choose a phylodynami...
journal_title:Systematic biology
pub_type: 杂志文章
doi:10.1093/sysbio/syy048
更新日期:2019-03-01 00:00:00
abstract::As we collect range-wide genetic data for morphologically-defined species, we increasingly unearth evidence for cryptic diversity. Delimiting this cryptic diversity is challenging, both because the divergences span a continuum and because the lack of overt morphological differentiation suggests divergence has proceede...
journal_title:Systematic biology
pub_type: 杂志文章
doi:10.1093/sysbio/syy026
更新日期:2018-11-01 00:00:00
abstract::Recent years have seen a constant rise in the availability of trait data, including morphological features, ecological preferences, and life history characteristics. These phenotypic data provide means to associate genomic regions with phenotypic attributes, thus allowing the identification of phenotypic traits associ...
journal_title:Systematic biology
pub_type: 杂志文章
doi:10.1093/sysbio/syx032
更新日期:2017-11-01 00:00:00
abstract::We develop a Bayesian method for inferring the species phylogeny under the multispecies coalescent (MSC) model. To improve the mixing properties of the Markov chain Monte Carlo (MCMC) algorithm that traverses the space of species trees, we implement two efficient MCMC proposals: the first is based on the Subtree Pruni...
journal_title:Systematic biology
pub_type: 杂志文章
doi:10.1093/sysbio/syw119
更新日期:2017-09-01 00:00:00
abstract::There has long been ambiguity in the use of the term tree in phylogenetic systematics, which is a continuous source of misinterpretation of evolutionary relationships. The basic problem is that while many trees with phylogenetic or evolutionary relevance, such as cladograms, are consistent with graph theory, tree-like...
journal_title:Systematic biology
pub_type: 杂志文章
doi:10.1093/sysbio/syx039
更新日期:2017-09-01 00:00:00
abstract::We develop a maximum likelihood (ML) method for estimating migration rates between species using genomic sequence data. A species tree is used to accommodate the phylogenetic relationships among three species, allowing for migration between the two sister species, while the third species is used as an out-group. A Mar...
journal_title:Systematic biology
pub_type: 杂志文章
doi:10.1093/sysbio/syw063
更新日期:2017-05-01 00:00:00
abstract::The impact of incomplete lineage sorting (ILS) on phylogenetic conflicts among genes, and the related issue of whether to account for ILS in species tree reconstruction, are matters of intense controversy. Here, focusing on full-genome data in placental mammals, we empirically test two assumptions underlying current u...
journal_title:Systematic biology
pub_type: 杂志文章
doi:10.1093/sysbio/syw082
更新日期:2017-01-01 00:00:00
abstract::Although concerns are being raised about a potential shortage of taxonomists and systematists, recent analyses suggest instead that the number of researchers involved in taxonomic descriptions is higher than ever and that the average number of new species described annually per taxonomist has declined in recent decade...
journal_title:Systematic biology
pub_type: 杂志文章
doi:10.1093/sysbio/syw053
更新日期:2016-11-01 00:00:00
abstract::Investigations of biodiversity, biogeography, and ecological processes rely on the identification of "species" as biologically significant, natural units of evolution. In this context, morphotaxonomy only provides an adequate level of resolution if reproductive isolation matches morphological divergence. In many group...
journal_title:Systematic biology
pub_type: 杂志文章
doi:10.1093/sysbio/syw031
更新日期:2016-09-01 00:00:00
abstract::The congruence between the order of cladistic branching and the first appearance dates of fossil lineages can be quantified using a variety of indices. Good matching is a prerequisite for the accurate time calibration of trees, while the distribution of congruence indices across large samples of cladograms has underpi...
journal_title:Systematic biology
pub_type: 杂志文章
doi:10.1093/sysbio/syw039
更新日期:2016-09-01 00:00:00
abstract::Evolutionary events co-occurring along phylogenetic trees usually point to complex adaptive phenomena, sometimes implicating epistasis. While a number of methods have been developed to account for co-occurrence of events on the same internal or external branch of an evolutionary tree, there is a need to account for th...
journal_title:Systematic biology
pub_type: 杂志文章
doi:10.1093/sysbio/syw004
更新日期:2016-09-01 00:00:00
abstract::Substitution rates are known to be variable among genes, chromosomes, species, and lineages due to multifarious biological processes. Here, we consider another source of substitution rate variation due to a technical bias associated with gene tree discordance. Discordance has been found to be rampant in genome-wide da...
journal_title:Systematic biology
pub_type: 杂志文章
doi:10.1093/sysbio/syw018
更新日期:2016-07-01 00:00:00
abstract::Rickettsia is a genus of intracellular bacteria whose hosts and transmission strategies are both impressively diverse, and this is reflected in a highly dynamic genome. Some previous studies have described the evolutionary history of Rickettsia as non-tree-like, due to incongruity between phylogenetic reconstructions ...
journal_title:Systematic biology
pub_type: 杂志文章
doi:10.1093/sysbio/syv084
更新日期:2016-03-01 00:00:00
abstract::Phylogenetic relationships inferred from multilocus organellar and nuclear DNA data are often difficult to resolve because of evolutionary conflicts among gene trees. However, conflicting or "outlier" associations (i.e., linked pairs of "operational terminal units" in two phylogenies) among these data sets often provi...
journal_title:Systematic biology
pub_type: 杂志文章
doi:10.1093/sysbio/syv070
更新日期:2016-01-01 00:00:00
abstract::Targeted sequence capture is becoming a widespread tool for generating large phylogenomic data sets to address difficult phylogenetic problems. However, this methodology often generates data sets in which increasing the number of taxa and loci increases amounts of missing data. Thus, a fundamental (but still unresolve...
journal_title:Systematic biology
pub_type: 杂志文章
doi:10.1093/sysbio/syv058
更新日期:2016-01-01 00:00:00
abstract::Tropical forests of Central and South America represent hotspots of biological diversity. Tree squirrels of the tribe Sciurini are an excellent model system for the study of tropical biodiversity as these squirrels disperse exceptional distances, and after colonizing the tropics of the Central and South America, they ...
journal_title:Systematic biology
pub_type: 杂志文章
doi:10.1093/sysbio/syv054
更新日期:2015-11-01 00:00:00
abstract::The reality of larger and larger molecular databases and the need to integrate data scalably have presented a major challenge for the use of phenotypic data. Morphology is currently primarily described in discrete publications, entrenched in noncomputer readable text, and requires enormous investments of time and reso...
journal_title:Systematic biology
pub_type: 杂志文章
doi:10.1093/sysbio/syv031
更新日期:2015-11-01 00:00:00
abstract::Polyploidization is an important speciation mechanism in the barley genus Hordeum. To analyze evolutionary changes after allopolyploidization, knowledge of parental relationships is essential. One chloroplast and 12 nuclear single-copy loci were amplified by polymerase chain reaction (PCR) in all Hordeum plus six out-...
journal_title:Systematic biology
pub_type: 杂志文章
doi:10.1093/sysbio/syv035
更新日期:2015-09-01 00:00:00
abstract::Phylogenetic reconstruction, divergence time estimations and ancestral range estimation were undertaken for 66% of the Afrotropical freshwater crab fauna (Potamonautidae) based on four partial DNA loci (12S rRNA, 16S rRNA, cytochrome oxidase one [COI], and histone 3). The present study represents the most comprehensiv...
journal_title:Systematic biology
pub_type: 杂志文章
doi:10.1093/sysbio/syv011
更新日期:2015-07-01 00:00:00