Host specificity and reproductive success of yucca moths (Tegeticula spp. Lepidoptera: Prodoxidae) mirror patterns of gene flow between host plant varieties of the Joshua tree (Yucca brevifolia: Agavaceae)

Molecular Ecology
Christopher Irwin SmithOlle Pellmyr

Abstract

Coevolution between flowering plants and their pollinators is thought to have generated much of the diversity of life on Earth, but the population processes that may have produced these macroevolutionary patterns remain unclear. Mathematical models of coevolution in obligate pollination mutualisms suggest that phenotype matching between plants and their pollinators can generate reproductive isolation. Here, we test this hypothesis using a natural experiment that examines the role of natural selection on phenotype matching between yuccas and yucca moths (Tegeticula spp.) in mediating reproductive isolation between two varieties of Joshua tree (Yucca brevifolia var. brevifolia and Y. brevifolia var. jaegeriana). Using passive monitoring techniques, DNA barcoding, microsatellite DNA genotyping, and sibship reconstruction, we track host specificity and the fitness consequences of host choice in a zone of sympatry. We show that the two moth species differ in their degree of host specificity and that oviposition on a foreign host plant results in the production of fewer offspring. This difference in host specificity between the two moth species mirrors patterns of chloroplast introgression from west to east between host varieties, su...Continue Reading

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Citations

Apr 30, 2010·Proceedings. Biological Sciences·Atsushi KawakitaMakoto Kato
Dec 10, 2013·Trends in Ecology & Evolution·David M AlthoffMarc T J Johnson
Jun 5, 2013·Evolution; International Journal of Organic Evolution·Marinus L de Jager, Allan G Ellis
Dec 5, 2012·Evolution; International Journal of Organic Evolution·Annika M Moe, George D Weiblen
Dec 2, 2010·Journal of Evolutionary Biology·W GodsoeO Pellmyr
Dec 20, 2011·Molecular Phylogenetics and Evolution·David M AlthoffOlle Pellmyr
Oct 30, 2016·American Journal of Botany·Jeremy B Yoder, James Leebens-Mack
Jun 13, 2020·Frontiers in Plant Science·Anne M RoyerChristopher Irwin Smith
Apr 14, 2021·American Journal of Botany·Christopher Irwin SmithRamona Flatz

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