نتایج جستجو برای: divergent selection

تعداد نتایج: 344021  

Journal: :Proceedings of the Royal Society B: Biological Sciences 2008

2005
Howard D. Rundle Patrik Nosil

Howard D. Rundle* and Patrik Nosil Department of Zoology and Entomology, University of Queensland, Brisbane, Queensland 4072, Australia Department of Biological Sciences, Simon Fraser University, Burnaby, BC V5A 1S6, Canada *Correspondence: E-mail: [email protected] Abstract Ecological processes are central to the formation of new species when barriers to gene flow (reproductive isolation) evo...

2017
Laura Southcott Marcus R Kronforst

Analyses of genomewide polymorphism data have begun to shed light on speciation and adaptation. Genome scans to identify regions of the genome that are unusually different between populations or species, possibly due to divergent natural or sexual selection, are widespread in speciation genomics. Theoretical and empirical work suggests that such outlier regions may grow faster than linearly dur...

Journal: :Trends in ecology & evolution 2012
Benjamin C Haller Luis F De Léon Gregor Rolshausen Kiyoko M Gotanda Andrew P Hendry

Servedio et al. [1], following Gavrilets [2], define a magic trait as ‘a trait subject to divergent selection and a trait contributing to non-random mating that are pleiotropic expressions of the same gene(s)’. This clarified definition is certainly helpful, but we outline here several pivotal questions for empirical research, particularly surrounding the crucial concept of effect size. The eff...

Journal: :Arquivos brasileiros de oftalmologia 2007
Vanessa Macedo Batista Fiorelli Mauro Goldchmit Carlos Fumiaki Uesugui Carlos Souza-Dias

PURPOSE To compare the results between recession of the lateral recti and monocular recess-resect procedure for the correction of the basic type of intermittent exotropia. METHODS 115 patients with intermittent exotropia were submitted to surgery. The patients were divided into 4 groups, according to the magnitude of preoperative deviation and the surgical procedure was subsequently performed...

Journal: :Vision Research 1995
A. V. Van den Berg L. J. Van Rijn J.Tj.H.N. de Faber

Recently, we developed a model of binocular fixation. This model predicts the amount of cyclovergence as a function of target elevation and horizontal target vergence. The prediction derives from the assumption that version and vergence add linearly and that the eye positions are constrained in three respects: (1) the foveae of the two eyes are directed towards the target, (2) the version compo...

2012
Junki Kwon Seung-Hyun Kim Yoonae A. Cho

PURPOSE To analyze the postoperative strabismic angle for five years or more and to investigate when the angle stabilized in intermittent exotropia. METHODS We retrospectively reviewed the clinical records of 89 patients who had undergone surgery for intermittent exotropia. The postoperative strabismic angles measured were analyzed at one-year intervals up to five years postoperatively. We di...

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