Results 41 to 50 of about 39,995 (294)

Phylogenetic relationships among four species of the guarani group of Drosophila (Diptera, Drosophilidae) as inferred by molecular and morphological analyses

open access: yesRevista Brasileira de Entomologia, 2002
Traditionally, the Drosophila guarani species group has been divided into two subgroups: the guarani and the guaramunu subgroups. Two, out of the four species included in this research, are members of the guarani subgroup (D. ornatifrons Duda, 1927 and D.
Lizandra Jaqueline Robe   +2 more
doaj   +1 more source

Phylogeny of the Chinese Subgenera of the Genus Homoneura (Diptera, Lauxaniidae, Homoneurinae) Based on Morphological Characters

open access: yesInsects, 2022
The genus Homoneura comprises over 700 described species in eight known subgenera distributed worldwide and has the highest species richness of Lauxaniidae. Five subgenera and more than 200 species have currently been recorded from China.
Chaoyang Kong   +4 more
doaj   +1 more source

Phylogeny of the Neotropical element of the Randia clade (Gardenieae, Rubiaceae, Gentianales) [PDF]

open access: yesPlant Ecology and Evolution, 2021
Background and aims – Generic limits of the tropical tribe Gardenieae (Ixoroideae, Rubiaceae) have partly remained unsettled. We produced a new phylogeny of the Randia clade, with emphasis on its Neotropical clade comprising five genera (Casasia, Randia,
Rodrigo Borges   +3 more
doaj   +3 more sources

A Likelihood-Ratio Test of Monophyly [PDF]

open access: yesSystematic Biology, 1996
Many phylogenetic analyses are inspired by or depend upon the monophyly of a group specified a priori. Also, many evolutionary problems for which phytogenies are useful do not require every detail of the phylogeny to be estimated correctly but depend upon the monophyly (or lack thereof) of a particular group.
David M. Hillis   +2 more
openaire   +2 more sources

Pangenomic Definition of Prokaryotic Species and the Phylogenetic Structure of Prochlorococcus spp.

open access: yesFrontiers in Microbiology, 2018
The pangenome is the collection of all groups of orthologous genes (OGGs) from a set of genomes. We apply the pangenome analysis to propose a definition of prokaryotic species based on identification of lineage-specific gene sets.
Mikhail A. Moldovan   +6 more
doaj   +1 more source

Recombination confounds the early evolutionary history of human immunodeficiency virus type 1: Subtype G is a circulating recombinant form [PDF]

open access: yes, 2007
Human immunodeficiency virus type I (HIV-1) is classified in nine subtypes (A to D, F, G, H, J, and K), a number of subsubtypes, and several circulating recombinant forms (CRFs).
Abecasis, Ana B.   +8 more
core   +2 more sources

Specimens at the Center: An Informatics Workflow and Toolkit for Specimen-level analysis of Public DNA database data [PDF]

open access: yes, 2016
Major public DNA databases — NCBI GenBank, the DNA DataBank of Japan (DDBJ), and the European Molecular Biology Laboratory (EMBL) — are invaluable biodiversity libraries. Systematists and other biodiversity scientists commonly mine these databases for
Brown, Bethany H.   +8 more
core   +1 more source

The root of the universal tree and the origin of eukaryotes based on elongation factor phylogeny [PDF]

open access: yes, 1996
The genes for the protein synthesis elongation factors Tu (EF-Tu) and G (EF-G) are the products of an ancient gene duplication, which appears to predate the divergence of all extant organismal lineages.
Baldauf, S.L.   +2 more
core   +2 more sources

Influence of microhabitat, fecundity, and parental care on the evolution of sexual size dimorphism in Caribbean Eleutherodactylus frogs

open access: yesEvolution, Volume 76, Issue 12, Page 3041-3053, December 2022., 2022
Abstract Rensch's rule suggests that sexual size dimorphism (SSD) increases with species size when males are the larger sex, whereas it decreases when females are the larger sex. However, the process responsible for this pattern remains obscure. SSD can result from sexual selection, such as intrasexual competition for access to mates, or from natural ...
Alvaro Dugo‐Cota   +3 more
wiley   +1 more source

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