Results 101 to 110 of about 17,767 (219)

Deep-Time Demographic Inference Suggests Ecological Release as Driver of Neoavian Adaptive Radiation

open access: yesDiversity, 2020
Assessing the applicability of theory to major adaptive radiations in deep time represents an extremely difficult problem in evolutionary biology.
Peter Houde   +2 more
doaj   +1 more source

Tertiary Climate Change and the Diversification of the Amazonian Gecko Genus Gonatodes (Sphaerodactylidae, Squamata) [PDF]

open access: yes, 2008
The genus Gonatodes is a monophyletic group of small-bodied, diurnal geckos distributed across northern South America, Central America, and the Caribbean.
Colli, Guarino R.   +3 more
core   +1 more source

When AI Becomes an Agent of the Firm: Examining the Evolution of AI in Organizations Through an Agency Theory Lens

open access: yesJournal of Management Studies, EarlyView.
Abstract Our work begins with the premise that the integration of artificial intelligence (AI) into firm decision making parallels the emergence of the professional manager, which prompted the birth of agency theory. We examine the evolution of AI through an agency theory lens, considering how the nature of firm control and decision rights change as AI
Beth K. Humberd, Scott F. Latham
wiley   +1 more source

Benthoplanidae, a new family of benthic ctenophores (Platyctenida), based on morphological and genetic data

open access: yesJournal of Systematics and Evolution, EarlyView.
The benthic ctenophore Benthoplana meteoris (adults left and bottom, planktonic juveniles to the top right), type species for the genus, which in turn is type for the newly erected family: Benthoplanidae (Ctenophora, Platyctenida). Abstract We present a phylogenetic analysis of benthic ctenophores of the order Platyctenida, sampling all but one genus ...
Nicholas Bezio   +2 more
wiley   +1 more source

Cause of gene tree discord? Distinguishing incomplete lineage sorting and lateral gene transfer in phylogenetics

open access: yes, 2017
Despite recent efforts that have produced data sets with hundreds and thousands of gene regions to resolve regions of the tree of life, recalcitrant nodes persist and disagreement among genes as well as disagreement between individual gene trees and species trees are common.
Huang, Huateng   +3 more
openaire   +1 more source

On the number of ranked species trees producing anomalous ranked gene trees

open access: yes, 2014
Analysis of probability distributions conditional on species trees has demonstrated the existence of anomalous ranked gene trees (ARGTs), ranked gene trees that are more probable than the ranked gene tree that accords with the ranked species tree.
Disanto, Filippo, Rosenberg, Noah A.
core   +1 more source

Longevity in plants impacts phylogenetic and population dynamics

open access: yesNew Phytologist, EarlyView.
Summary Phylogenies of long‐lived plants often exhibit short molecular branch lengths and high levels of gene‐tree conflict. However, the biological mechanisms underlying these patterns remain unclear. We examine this with simulations and through empirical examination of several large seed plant clades.
Stephen A. Smith   +9 more
wiley   +1 more source

Median quartet tree search algorithms using optimal subtree prune and regraft

open access: yesAlgorithms for Molecular Biology
Gene trees can be different from the species tree due to biological processes and inference errors. One way to obtain a species tree is to find one that maximizes some measure of similarity to a set of gene trees.
Shayesteh Arasti, Siavash Mirarab
doaj   +1 more source

Structural Variations Contribute to Subspeciation and Yield Heterosis in Rice

open access: yesPlant Biotechnology Journal, EarlyView.
ABSTRACT Yield heterosis has been extensively exploited in hybrid breeding, with intersubspecific hybrids often exhibiting the most pronounced effects. However, developing elite hybrids remains a laborious and time‐consuming process. The genetic basis of heterosis has been debated for over a century, hindered largely by the lack of high‐quality genomes.
Zhiwu Dan, Yunping Chen, Wenchao Huang
wiley   +1 more source

There are no caterpillars in a wicked forest

open access: yes, 2015
Species trees represent the historical divergences of populations or species, while gene trees trace the ancestry of individual gene copies sampled within those populations. In cases involving rapid speciation, gene trees with topologies that differ from
Degnan, James H., Rhodes, John A.
core   +1 more source

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