Evolution of multiplayer cooperation on graphs

Evolution of multiplayer cooperation on graphs

Jorge Peña, Bin Wu, Jordi Arranz, Arne Traulsen

Phenotypic plasticity promotes balanced polymorphism in periodic environments by a genomic storage effect

Phenotypic plasticity promotes balanced polymorphism in periodic environments by a genomic storage effect

Davorka Gulisija, Yuseob Kim, Joshua B. Plotkin

Getting the hologenome concept right: An eco-evolutionary framework for hosts and their microbiomes

Getting the hologenome concept right: An eco-evolutionary framework for hosts and their microbiomes

Kevin R Theis, Nolwenn Marie M. Dheilly, Jonathan L. Klassen, Robert M. Brucker, John F. Baines, Thomas C.G. Bosch, John F. Cryan, Scott F. Gilbert, Charles J. Goodnight, Elisabeth A. Lloyd, Jan Sapp, Philippe Vandenkoornhuyse, Ilana Zilber-Rosenberg, Eugene Rosenberg, Seth R. Bordenstein

Development of molecular markers for determining continental origin of wood from white oaks (Quercus L. sect. Quercus)

Development of molecular markers for determining continental origin of wood from white oaks (Quercus L. sect. Quercus)

Hilke Schroeder, Richard Cronn, Yulai Yanbaev, Tara Jennings, Malte Mader, Bernd Degen, Birgit Kersten

Role of epistasis on the fixation probability of a nonmutator in an adapted asexual population

Role of epistasis on the fixation probability of a nonmutator in an adapted asexual population
Ananthu James

The mutation rate of a well adapted population is prone to reduction so as to have lower mutational load. The aim here is to understand the role of epistatic interactions in this process. Using a multitype branching process, the probability of fixation of a rare nonmutator in an asexual mutator population undergoing deleterious mutations at constant, but much higher rate than that of the nonmutator is analytically calculated here. We find that antagonistic epistasis lowers chances of mutation rate reduction, while synergistic epistasis enhances it. Below a critical value of epistasis, it can be seen that the fixation probability behaves nonmonotonically with variation in mutation rate of the background population for constant selection. Also, the variation of this critical value of epistasis parameter with the strength of the mutator is discussed. For synergistic epistasis, fixation probability shows a nonmonotonic trend with respect to selection when mutation rate is held constant.

On the stochastic evolution of finite populations

On the stochastic evolution of finite populations
Fabio A. C. C. Chalub, Max O. Souza

This work is concerned with Markov chain models used in population genetics. Namely, we start from two celebrated models, the Moran and the Wright-Fisher processes, and study them from a very general viewpoint. Our aim is three fold: to identify the algebraic structures associated to time-homogeneous processes; to study the monotonicity properties of the fixation probability, with respect to the initial condition— in particular we show that there are situations, that are by no means exceptional, where an increase in the initial presence of a type can lead to a decrease in the fixation probability of this type; to understand time-inhomogeneous processes in a more systematic way. In addition, we also discuss the traditional identification of frequency dependent fitnesses and pay-offs, extensively used in evolutionary game theory, the role of weak selection when the population is finite, and the relations between jumps in evolutionary processes and frequency dependent fitnesses.

Hybrid asexuality as a primary reproductive barrier: on the interconection between asexuality and speciation

Hybrid asexuality as a primary reproductive barrier: on the interconection between asexuality and speciation

Karel Janko, Jan Pačes, Hilde Wilkinson-Herbots, Rui J Costa, Jan Röslein, Pavel Drozd, Nataliia Iakovenko, Jakub Rídl, Jan Kočí, Radka Reichová, Vēra Šlechtová, Lukáš Choleva