Results 51 to 60 of about 45,544 (263)

Incomplete lineage sorting and introgression in the diversification of Chinese spot-billed ducks and mallards. [PDF]

open access: yesCurr Zool, 2019
AbstractIncomplete lineage sorting and introgression are 2 major and nonexclusive causes of species-level non-monophyly. Distinguishing between these 2 processes is notoriously difficult because they can generate similar genetic signatures. Previous studies have suggested that 2 closely related duck species, the Chinese spot-billed duck Anas ...
Wang W   +5 more
europepmc   +4 more sources

Ancestral population genomics [PDF]

open access: yes, 2012
The full genomes of several closely related species are now available, opening an emerging field of investigation borrowing both from population genetics and phylogenetics.
Dutheil, J., Hobolth, A.
core   +2 more sources

Evaluating multiple criteria for species delimitation: an empirical example using Hawaiian palms (Arecaceae: Pritchardia)

open access: yesBMC Evolutionary Biology, 2012
Background Robust species delimitations are fundamental for conservation, evolutionary, and systematic studies, but they can be difficult to estimate, particularly in rapid and recent radiations.
Bacon Christine D   +3 more
doaj   +1 more source

Whole genome phylogeny of Gallus: introgression and data-type effects

open access: yesAvian Research, 2020
Background Previous phylogenetic studies that include the four recognized species of Gallus have resulted in a number of distinct topologies, with little agreement. Several factors could lead to the failure to converge on a consistent topology, including
George P. Tiley   +4 more
doaj   +1 more source

Disk Covering Methods Improve Phylogenomic Analyses [PDF]

open access: yes, 2014
Motivation: With the rapid growth rate of newly sequenced genomes, species tree inference from multiple genes has become a basic bioinformatics task in comparative and evolutionary biology.
Bayzid, Md Shamsuzzoha   +2 more
core   +1 more source

Early-branching euteleost relationships: areas of congruence between concatenation and coalescent model inferences [PDF]

open access: yesPeerJ, 2017
Phylogenetic inference based on evidence from DNA sequences has led to significant strides in the development of a stable and robustly supported framework for the vertebrate tree of life.
Matthew A. Campbell   +3 more
doaj   +2 more sources

Coalescent-based genome analyses resolve the early branches of the euarchontoglires [PDF]

open access: yes, 2013
Despite numerous large-scale phylogenomic studies, certain parts of the mammalian tree are extraordinarily difficult to resolve. We used the coding regions from 19 completely sequenced genomes to study the relationships within the super-clade ...
A Criscuolo   +52 more
core   +3 more sources

Speciation among sympatric lineages in the genus Palythoa (Cnidaria: Anthozoa: Zoantharia) revealed by morphological comparison, phylogenetic analyses and investigation of spawning period [PDF]

open access: yesPeerJ, 2018
Zoantharians are sessile marine invertebrates and colonial organisms possessing sexual and asexual reproductive ability. The zooxanthellate zoantharian genus Palythoa is widely distributed in coral reef ecosystems.
Masaru Mizuyama   +2 more
doaj   +2 more sources

Common lizards break Dollo’s law of irreversibility: genome-wide phylogenomics support a single origin of viviparity and re-evolution of oviparity [PDF]

open access: yes, 2018
Dollo’s law of irreversibility states that once a complex trait has been lost in evolution, it cannot be regained. It is thought that complex epistatic interactions and developmental constraints impede the re-emergence of such a trait.
Elmer, Kathryn R.   +2 more
core   +1 more source

Divergence estimation in the presence of incomplete lineage sorting and migration [PDF]

open access: yesSystematic Biology, 2017
AbstractThis paper focuses on the problem of estimating a species tree from multilocus data in the presence of incomplete lineage sorting and migration. We develop a mathematical model similar to IMa2 (Hey 2010) for the relevant evolutionary processes which allows both the the population size parameters and the migration rates between pairs of species ...
openaire   +2 more sources

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