Abstract:
:Whereas examples of insular speciation within the endemic-rich Macaronesian hotspot flora have been documented, the phylogeography of recently evolved plants in the region has received little attention. The Macaronesian red fescues constitute a narrow and recent radiation of four closely related diploid species distributed in the Canary Islands (F. agustinii), Madeira (F. jubata), and the Azores (F. francoi and F. petraea), with a single extant relative distributed in mainland southwest Europe (F. rivularis). Bayesian structure and priority consensus tree approaches and population spatial correlations between genetic, geographical, and dispersal distances were used to elucidate the phylogeographical patterns of these grasses. Independent versus related origins and dispersal versus isolation by distance (IBD) hypotheses were tested to explain the genetic differentiation of species and populations, respectively. Genetic structure was found to be geographically distributed among the archipelagos and the islands endemics. The high number of shared AFLP fragments in all four species suggests a recent single origin from a continental Pliocene ancestor. However, the strong allelic structure detected among the Canarian, Madeiran, and Azorean endemics and the significant standardized residual values obtained from structured Bayesian analysis for pairwise related origin hypotheses strongly supported the existence of three independent continental-oceanic colonization events. The Canarian F. agustinii, the Madeiran F. jubata, and the two sister F. francoi and F. petraea Azorean species likely evolved from different continental founders in their respective archipelagos. Despite the short span of time elapsed since colonization, the two sympatric Azorean species probably diverged in situ, following ecological adaptation, from a common ancestor that arrived from the near mainland. Simple dispersal hypotheses explained most of the genetic variation at the species level better than IBD models. The optimal dispersal model for F. agustinii was a bidirectional centripetal stepping-stone colonization pattern, an eastern-to-western volcanism-associated dispersion was favored for F. francoi, whereas for the recently derived F. petraea a counterintuitive direction of colonization (west-to-east) was suggested. The population-based phylogeographical trends deduced from our study could be used as predictive models for other Macaronesian plant endemics with similar distribution areas and dispersal abilities.
journal_name
Syst Bioljournal_title
Systematic biologyauthors
Díaz-Pérez A,Sequeira M,Santos-Guerra A,Catalán Pdoi
10.1080/10635150802302450subject
Has Abstractpub_date
2008-10-01 00:00:00pages
732-49issue
5eissn
1063-5157issn
1076-836Xpii
904007884journal_volume
57pub_type
杂志文章abstract::Correct rooting of the angiosperm radiation is both challenging and necessary for understanding the origins and evolution of physiological and phenotypic traits in flowering plants. The problem is known to be difficult due to the large genetic distance separating flowering plants from other seed plants and the sparse ...
journal_title:Systematic biology
pub_type: 杂志文章
doi:10.1093/sysbio/sys070
更新日期:2013-01-01 00:00:00
abstract::Characters derived from advertisement calls, morphology, allozymes, and the sequences of the small subunit of the mitochondrial ribosomal gene (12S) and the cytochrome oxidase I (COI) mitochondrial gene were used to estimate the phylogeny of frogs of the Physalaemus pustulosus group (Leptodactylidae). The combinabilit...
journal_title:Systematic biology
pub_type: 杂志文章
doi:10.1080/106351598260932
更新日期:1998-06-01 00:00:00
abstract::The genomics revolution offers great promise for resolving the phylogeny of living taxa, but does it offer any benefits for reconstructing relationships among extinct (fossil) taxa? Superficially, the answer would seem to be "no," given that molecular data cannot be obtained for most fossil taxa. However, because foss...
journal_title:Systematic biology
pub_type: 杂志文章
doi:10.1093/sysbio/syp012
更新日期:2009-02-01 00:00:00
abstract::Markov chain Monte Carlo (MCMC) is a methodology that is gaining widespread use in the phylogenetics community and is central to phylogenetic software packages such as MrBayes. An important issue for users of MCMC methods is how to select appropriate values for adjustable parameters such as the length of the Markov ch...
journal_title:Systematic biology
pub_type: 杂志文章
doi:10.1080/10635150600812544
更新日期:2006-08-01 00:00:00
abstract::The Cracidae is one of the most endangered and distinctive bird families in the Neotropics, yet the higher relationships among taxa remain uncertain. The molecular phylogeny of its 11 genera was inferred using 10,678 analyzable sites (5,412 from seven different mitochondrial segments and 5,266 sites from four nuclear ...
journal_title:Systematic biology
pub_type: 杂志文章
doi:10.1080/10635150290102519
更新日期:2002-12-01 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::Sequence divergence for segments of three mitochondrial DNA (mtDNA) genes encoding the 12S and 16S ribosomal RNA and cytochrome b was examined in newts belonging to the genus Euproctus (E. asper, E. montanus, E. platycephalus) and in three other species belonging to the same family (Salamandridae), Triturus carnifex, ...
journal_title:Systematic biology
pub_type: 杂志文章
doi:10.1093/sysbio/46.1.126
更新日期:1997-03-01 00:00:00
abstract::The treehopper subfamily Membracinae (Insecta: Hemiptera: Membracidae) comprises the majority of genera and species diversity in the New World tropics. These treehoppers exhibit a wide range of social behaviors, making them an excellent group for studying patterns of social evolution in insects. However, to date the t...
journal_title:Systematic biology
pub_type: 杂志文章
doi:10.1080/10635150490445869
更新日期:2004-06-01 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::Gene trees record the combination of gene-level events, such as duplication, transfer and loss (DTL), and species-level events, such as speciation and extinction. Gene tree-species tree reconciliation methods model these processes by drawing gene trees into the species tree using a series of gene and species-level eve...
journal_title:Systematic biology
pub_type: 杂志文章
doi:10.1093/sysbio/syt054
更新日期:2013-11-01 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::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::Following (1) the large-scale molecular phylogeny of seed plants based on plastid rbcL gene sequences (published in 1993 by Chase et al., Ann. Missouri Bot. Gard. 80:528-580) and (2) the 18S nuclear phylogeny of flowering plants (published in 1997 by Soltis et al., Ann. Missouri Bot. Gard. 84:1-49), we present a phylo...
journal_title:Systematic biology
pub_type: 杂志文章
doi:10.1093/sysbio/49.2.306
更新日期:2000-06-01 00:00:00
abstract::Even though relationships within Annelida are poorly understood, Eunicida is one of only a few major annelid lineages well supported by morphology. The seven recognized eunicid families possess sclerotized jaws that include mandibles and a maxillary apparatus. The maxillary apparatuses vary in shape and number of elem...
journal_title:Systematic biology
pub_type: 杂志文章
doi:10.1080/10635150500354910
更新日期:2006-02-01 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::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::In this article, we use supermatrix data-mining methods to reconstruct a large, highly inclusive phylogeny of Cyperaceae from nucleotide data available on GenBank. We explore the properties of these trees and their utility for phylogenetic inference, and show that even the highly incomplete alignments characteristic o...
journal_title:Systematic biology
pub_type: 杂志文章
doi:10.1093/sysbio/sys088
更新日期:2013-03-01 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::Historically, comparisons of host and parasite phylogenies have concentrated on cospeciation. However, many of these comparisons have demonstrated that the phylogenies of hosts and parasites are seldom completely congruent, suggesting that phenomena other than cospeciation play an important role in the evolution of ho...
journal_title:Systematic biology
pub_type: 杂志文章
doi:10.1080/10635150490265085
更新日期:2004-02-01 00:00:00
abstract::Two lines of evidence indicate that the degree of symmetry in phylogenetic topologies differs at different hierarchical levels. First, in a set of 61 phylogenies with superspecific taxa as their terminals, trees were on average more unbalanced (asymmetric) when the species richness of terminals was considered than whe...
journal_title:Systematic biology
pub_type: 杂志文章
doi:10.1080/10635150290102546
更新日期:2002-12-01 00:00:00
abstract::Although most often used to represent phylogenetic uncertainty, network methods are also potentially useful for describing the phylogenetic complexity expected to characterize recent species radiations. One network method with particular advantages in this context is split decomposition. However, in its standard imple...
journal_title:Systematic biology
pub_type: 杂志文章
doi:10.1080/10635150590906046
更新日期:2005-02-01 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 main goals of this study were to provide a robust phylogeny for the families of the superfamily Curculionoidea, to discover relationships and major natural groups within the family Curculionidae, and to clarify the evolution of larval habits and host-plant associations in weevils to analyze their role in weevil di...
journal_title:Systematic biology
pub_type: 杂志文章
doi:10.1080/10635150290102465
更新日期:2002-10-01 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::Tree reconstruction methods are often judged by their accuracy, measured by how close they get to the true tree. Yet, most reconstruction methods like maximum likelihood (ML) do not explicitly maximize this accuracy. To address this problem, we propose a Bayesian solution. Given tree samples, we propose finding the tr...
journal_title:Systematic biology
pub_type: 杂志文章
doi:10.1093/sysbio/syr021
更新日期:2011-07-01 00:00:00
abstract::Using different data sets mainly from the plant family Rubiaceae, but in parts also from the Apocynaceae, Asteraceae, Lardizabalaceae, Saxifragaceae, and Solanaceae, we have investigated the effect of number of characters, number of taxa, and kind of data on bootstrap values within phylogenetic trees. The percentage o...
journal_title:Systematic biology
pub_type: 杂志文章
doi:10.1080/106351599260085
更新日期:1999-09-01 00:00:00
abstract::Platyrrhine primates and caviomorph rodents are clades of mammals that colonized South America during its period of isolation from the other continents, between 100 and 3 million years ago (Mya). Until now, no molecular study investigated the timing of the South American colonization by these two lineages with the sam...
journal_title:Systematic biology
pub_type: 杂志文章
doi:10.1080/10635150500481390
更新日期:2006-04-01 00:00:00
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::The mitochondrial genome is one of the most frequently used loci in phylogenetic and phylogeographic analyses, and it is becoming increasingly possible to sequence and analyze this genome in its entirety from diverse taxa. However, sequencing the entire genome is not always desirable or feasible. Which genes should be...
journal_title:Systematic biology
pub_type: 杂志文章
doi:10.1080/10635150500541672
更新日期:2006-04-01 00:00:00
abstract::We modified the phylogenetic program MrBayes 3.1.2 to incorporate the compound Dirichlet priors for branch lengths proposed recently by Rannala, Zhu, and Yang (2012. Tail paradox, partial identifiability and influential priors in Bayesian branch length inference. Mol. Biol. Evol. 29:325-335.) as a solution to the prob...
journal_title:Systematic biology
pub_type: 杂志文章
doi:10.1093/sysbio/sys030
更新日期:2012-10-01 00:00:00