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Sympatric speciation by allochrony?

Rosser, Neil; Seixas, Fernando; Mallet, James; (2022) Sympatric speciation by allochrony? Molecular Ecology , 31 (15) pp. 3975-3978. 10.1111/mec.16599. Green open access

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Abstract

Sympatric speciation was once thought most improbable, but careful study of some systems, particularly the apple maggot (Rhagoletis pomonella) and related Rhagoletis species, has led to its reinstatement as a likely mode of speciation in some cases. Different species and host races in this clade of flies often have highly specialized host preference, and along with frequent evolutionary shifts to different fruit species between sister taxa, there is a likely effect of the timing of adult emergence that follows host fruiting phenology. This is known as “allochronic” isolation (from the Greek meaning “different timing”). This overview covers recent discoveries by Inskeep et al. (Molecular Ecology, 2021) showing how allochrony is a major factor in preventing gene flow between a pair of sister species of Rhagoletis on different host fruits. Although the authors do not claim to prove sympatric speciation, it does seem very likely, and the work clearly underscores how readily host shifts via allochrony can aid sympatric speciation.

Type: Article
Title: Sympatric speciation by allochrony?
Location: England
Open access status: An open access version is available from UCL Discovery
DOI: 10.1111/mec.16599
Publisher version: https://doi.org/10.1111/mec.16599
Language: English
Additional information: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.
Keywords: Science & Technology, Life Sciences & Biomedicine, Biochemistry & Molecular Biology, Ecology, Evolutionary Biology, Environmental Sciences & Ecology, adaptation, allochrony, host races, Rhagoletis, sympatric speciation, HOST RACES, RHAGOLETIS, DIVERGENCE
UCL classification: UCL
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Life Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Life Sciences > Div of Biosciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Life Sciences > Div of Biosciences > Genetics, Evolution and Environment
URI: https://discovery.ucl.ac.uk/id/eprint/10165713
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