Effects of geographical heterogeneity in species interactions on the evolution of venom genes

Proceedings. Biological Sciences
Dan ChangThomas F Duda

Abstract

Geographical heterogeneity in the composition of biotic interactions can create a mosaic of selection regimes that may drive the differentiation of phenotypes that operate at the interface of these interactions. Nonetheless, little is known about effects of these geographical mosaics on the evolution of genes encoding traits associated with species interactions. Predatory marine snails of the family Conidae use venom, a cocktail of conotoxins, to capture prey. We characterized patterns of geographical variation at five conotoxin genes of a vermivorous species, Conus ebraeus, at Hawaii, Guam and American Samoa, and evaluated how these patterns of variation are associated with geographical heterogeneity in prey utilization. All populations show distinct patterns of prey utilization. Three 'highly polymorphic' conotoxin genes showed significant geographical differences in allelic frequency, and appear to be affected by different modes of selection among populations. Two genes exhibited low levels of diversity and a general lack of differentiation among populations. Levels of diversity of 'highly polymorphic' genes exhibit a positive relationship with dietary breadth. The different patterns of evolution exhibited by conotoxin genes...Continue Reading

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Citations

Jan 29, 2016·BMC Evolutionary Biology·Dan Chang, Thomas F Duda
May 28, 2016·BMC Genomics·Mark A PhuongMichael E Alfaro
Aug 4, 2016·Molecular Biology and Evolution·Scott W Roy
May 23, 2017·Marine Drugs·Samuel D RobinsonHelena Safavi-Hemami
May 31, 2017·Toxins·Giulia ZancolliWolfgang Wüster
Mar 8, 2018·Molecular Biology and Evolution·Mark A Phuong, Gusti N Mahardika
Sep 20, 2017·Genome Biology and Evolution·Qing LiHelena Safavi-Hemami
Jan 24, 2019·Marine Drugs·Mriga DuttRichard James Lewis

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