Showing papers in "Molecular Phylogenetics and Evolution in 2000"

TL;DR: It is concluded that judicious choice of mitochondrial genes and appropriate data weighting, in conjunction with purposeful taxonomic sampling, are prerequisites for resolving higher-level relationships in teleosts under the maximum-parsimony optimality criterion.

TL;DR: Using new and existing 18S rRNA sequence data, it is shown that at least five species of glomalean fungi lie outside the previously defined families and diverged very early in the evolution of that group.

TL;DR: A new morphological matrix consisting of 16 putatively homologous characters and two molecular data sets to investigate further this major group of free-living members of the Platyhelminthes, where the monophyly of the Proseriata cannot be confirmed categorically with any of these data sets.

TL;DR: Using simulations it is demonstrated that noise can by itself generate highly significant results in the ILD test and demonstrate why this is the case.

TL;DR: The results suggest that the isolation of most morphologically similar disjunct species in eastern Asia and eastern North America occurred during the global climatic cooling period that took place throughout the late Tertiary and Quaternary.

TL;DR: The idea of consistency between assumption and analysis through alignment and cladogram reconstruction is not limited to parsimony analysis and could and should be applied to other forms of analysis such as maximum likelihood.

TL;DR: The phylogenetic relationships of the different populations of B. tabaci and the origins of effective natural enemies of the B biotype suggest that knowing the origin of the A biotype is not essential to finding effective agents and supports the notion that crop management is the key aspect to control.

TL;DR: The results of one of the first analyses to use male-specific nuclear markers in elucidating primate phylogenetic relationships at the intrageneric level raise the question of whether a phylogenetic tree should be a topology of species origins or a depiction of more current species relationships, including subsequent episodes of introgression.

TL;DR: A speedy approach to network construction is described, based on a careful planning of the processing order, which makes it possible to reconstruct some of the confounding recurrent mutations in intraspecific control-region sequence variation of human mitochondrial DNA.

TL;DR: This work constructed a representative molecular phylogeny, based on domains D1-D3 of the nuclear large subunit 28S rDNA, for 18 heterodont bivalves and for two oyster outgroup taxa, and found that the results do not support the monophyly of the Corbiculoidea and are consistent with the hypothesis that all three families of freshwaterheterodonts represent independent colonization events by marine ancestors.

TL;DR: The findings suggest that the origin of the different murine and arvicoline lineages was rapid, indicating an adaptive radiation with fast speciation.

TL;DR: It is shown that concerted evolution was proceeding rapidly enough in ETS that species-specific phylogenetic signal was retained and it should be now be possible to use the entire ETS for phylogenetic reconstruction of recently diverged lineages in Asteraceae and at least three other families.

TL;DR: A phylogenetic study of Asteridae sensu lato was conducted based on chloroplast ndhF gene sequences for 116 ingroup and 13 outgroup species, providing much greater resolution and stronger bootstrap support throughout the tree.

TL;DR: The sequence of divergence within the eremicus species group and causal association of geological events of the Neogene and Holocene provide a working hypothesis against which phylogeographic patterns among other arid-adapted species of the warm regional deserts of North America may be compared.

TL;DR: To resolve phylogenetic relationships among these highly adaptive crabs, portions of the mitochondrial genome corresponding to the 16S rRNA gene were sequenced for all grapsoid genera occurring in America and the resulting phylogeny confirms most of the present grapsid subfamilies but suggests reclassification of some of the genera and recognition of new taxonomic units.

TL;DR: The reconciled trees technique is applied to phylogenies for nine vertebrate genes and the resulting species tree shows much similarity with currently accepted vertebrate relationships.

TL;DR: The validity of this assumption in the pigeons and doves is tested by comparing phylogenies derived from nuclear (beta-fibrinogen intron 7) and mitochondrial (cytochrome b) genes, which revealed no significant incongruence between trees derived from the two genes.

TL;DR: It is demonstrated that, while incompatibility between loci can be explained by random sorting of allelic lineages, incompatibility within loci must be attributed largely to the joint effect of recombination and genetic drift.

TL;DR: This study is one of the first reporting the phylogenetic and biogeographic relationships of a genus that is widely distributed in European rivers and contains species that are a major component of the European ichthyofauna.

TL;DR: Most of the evolution of the colonial Volvocales appears to constitute a gradual progression in colonial complexity and in types of sexual reproduction, as in the traditional volvocine lineage hypothesis, although reverse evolution must be considered for the origin of certain species of Pleodorina.

TL;DR: An analysis of partial sequences of the 16S ribosomal rRNA gene of 20 poison frog species (Dendrobatidae) confirmed their phylogenetic relationships to bufonid and leptodactylid frogs and supported monophyly of the genus Phyllobates but indicated paraphyly of Epipedobates and Colostethus.

TL;DR: A comparative analysis of complete mitochondrial ribosomal large subunit sequences of a chiton, two bivalves, six gastropod, and a cephalopod revealed substantial length variation among the taxa, with stylommatophoran gastropods possessing the shortest lengths.

TL;DR: Estimates of levels of saturation suggest that the trnL-trnF spacer and the third codon position of the rps4 gene have reached saturation, in at least the transitions, and phylogenetic analyses suggest that mode of branching and reduced peristomes are homoplastic at the ordinal level in pleurocarpous mosses.

TL;DR: The phylogeny should represent the basis for further studies on the causes of geographical variation in this complex and allow the inferences that small body size evolved twice and that the ability of one population to secrete highly lethal toxins related to Mojave toxin arose within the complex.

TL;DR: The results suggest that some morphological and ecological traits concerning maxillary dentition, macrohabitat use, and foraging strategy have appeared multiple times during the evolution of xenodontine snakes.

TL;DR: Detailed phylogenetic analyses of primary character data for arctoid carnivorans provide compelling evidence for the relationships of the red panda and demonstrate that small taxonomic sample sizes can result in misleading or possibly erroneous conclusions about phylogenetic relationships and taxonomy.

TL;DR: The authors' results indicate that D. legata and the Rattus group diverged at 20-30% of the divergence time of Rattus and Mus under the assumption of the molecular clock, suggesting that the Okinawa area preserves rare indigenous species with various levels of genetic endemicity.

TL;DR: The sine qua non necessity of incorporating a legitimate “Specimens Examined” section into every paper published using molecular sequence data is explored.

TL;DR: To resolve the relationships of the African, American, and Asian species to each other and to the marine/Australo-Melanesian clade, the entire cytochrome b gene for 28 elapids was sequenced.

TL;DR: Molecular evidence suggests that at least some morphospecies are artificial, defined by convergent leaf forms, and indicates that F. antipyretica is positively paraphyletic, with European populations more closely related to European endemic species than to North American populations that are morphologically conspecific.