618 research outputs found
Genomic regions of current low hybridisation mark long-term barriers to gene flow in scarce swallowtail butterflies.
No full textMany closely related species continue to hybridise after millions of generations of divergence. However, the extent to which current patterning in hybrid zones connects back to the speciation process remains unclear: does evidence for current multilocus barriers support the hypothesis of speciation due to multilocus divergence? We analyse whole-genome sequencing data to investigate the speciation history of the scarce swallowtails Iphiclidespodalirius and I . feisthamelii, which abut at a narrow ( ∼ 25 km) contact zone north of the Pyrenees. We first quantify the heterogeneity of effective migration rate under a model of isolation with migration, using genomes sampled across the range to identify long-term barriers to gene flow. Secondly, we investigate the recent ancestry of individuals from the hybrid zone using genome polarisation and estimate the coupling coefficient under a model of a multilocus barrier. We infer a low rate of long-term gene flow from I . feisthamelii into I . podalirius - the direction of which matches the admixture across the hybrid zone - and complete reproductive isolation across ≈ 33% of the genome. Our contrast of recent and long-term gene flow shows that regions of low recent hybridisation are indeed enriched for long-term barriers which maintain divergence between these hybridising sister species. This finding paves the way for future analysis of the evolution of reproductive isolation along the speciation continuum
FIGURES 3–6 in A new species of Ophionyssus Mégnin (Acari: Mesostigmata: Macronyssidae) parasitic on Lacerta schreiberi Bedriaga (Reptilia: Lacertidae) from the Iberian Peninsula, and a world key to species
No full textFIGURES 3–6. Ophionyssus schreibericolus Moraza sp. nov., adult male: 3, idiosoma, dorsal aspect; 4, idiosoma, ventral aspect; 5, chelicera, latero-antiaxial view; 6, femur III, anterolateral view.Published as part of Moraza, María L., Irwin, Nancy R., Godinho, Raquel, Baird, Stuart J. E. & Bellocq, Joëlle Goüy De, 2009, A new species of Ophionyssus Mégnin (Acari: Mesostigmata: Macronyssidae) parasitic on Lacerta schreiberi Bedriaga (Reptilia: Lacertidae) from the Iberian Peninsula, and a world key to species, pp. 58-68 in Zootaxa 2007 on page 62, DOI: 10.5281/zenodo.18572
Correction to: Latitudinal variation in monthly-scale reproductive synchrony among Acropora coral assemblages in the Indo-Pacific (Coral Reefs, (2021), 10.1007/s00338-021-02129-3)
No full text\ua9 The Author(s) 2021.The article Latitudinal variation in monthly-scale reproductive synchrony among Acropora coral assemblages in the Indo-Pacific, written by Jessica Bouwmeester, Alasdair J. Edwards, James R. Guest, Andrew G. Bauman, Michael L. Berumen, Andrew H. Baird, was originally published electronically on the publisher’s Internet portal on 15 June, 2021 without open access. With the author(s)’ decision to opt for Open Choice, the copyright of the article changed on 17 June, 2021 to The Author(s) 2021 and the article is forthwith distributed under a Creative Commons Attribution.
Monte Carlo integration over stepping stone models for spatial genetic inference using approximate Bayesian computation
No full textContact: Fax: +3512 5266 1780; E-mail: [email protected] audienceApproximate Bayesian computation (ABC) substitutes simulation for analytic models in Bayesian inference. Simulating evolutionary scenarios under Kimura's stepping stone model (KSS) might therefore allow inference over spatial genetic process where analytical results are difficult to obtain. ABC first creates a reference set of simulations and would proceed by comparing summary statistics over KSS simulations to summary statistics from localities sampled in the field, but: comparison of which localities and stepping stones? Identical stepping stones can be arranged so two localities fall in the same stepping stone, nearest or diagonal neighbours, or without contact. None is intrinsically correct, yet some choice must be made and this affects inference. We explore a Bayesian strategy for mapping field observations onto discrete stepping stones. We make Sundial, for projecting field data onto the plane, available. We generalize KSS over regular tilings of the plane. We show Bayesian averaging over the mapping between a continuous field area and discrete stepping stones improves the fit between KSS and isolation by distance expectations. We make Tiler Durden available for carrying out this Bayesian averaging. We describe a novel parameterization of KSS based on Wright's neighbourhood size, placing an upper bound on the geographic area represented by a stepping stone and make it available as m Vector. We generalize spatial coalescence recursions to continuous and discrete space cases and use these to numerically solve for KSS coalescence previously examined only using simulation. We thus provide applied and analytical resources for comparison of stepping stone simulations with field observations
H. J. Bhabha : a case study of synchronous references
No full textQuantitative analysis of the events of synchronous references in the research papers followed throughout the publishing career of an individual scientist revealed interesting highlights on the knowledge-generating-system. In the case study of Homi Jehangir Bhabha first quinquennium and fifth quinquennium of his research career had low Self-references; third quinquennium and fourth quinquennium had moderate Self-references; whereas second quinquennium had highest Self-references. The two major clusters of Self-references occurring during the second and third quinquennium were indicators of active periods of knowledgegenerating and faster communications.(Revised version published in 2006 in International Journal of Nuclear Knowledge Management,Vol.2. No.1. pp.14-30. see PDF2
S1 Appendix - Genomic regions of current low hybridisation mark long-term barriers to gene flow in scarce swallowtail butterflies
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S9 Fig - Genomic regions of current low hybridisation mark long-term barriers to gene flow in scarce swallowtail butterflies
No full textS9 Fig - Genomic regions of current low hybridisation mark long-term barriers to gene flow in scarce swallowtail butterflies.Peer reviewe
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