Evolutionary dynamics of genome size and content during the adaptive radiation of Heliconiini butterflies.
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2023-09
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Heliconius butterflies, a speciose genus of Müllerian mimics, represent a classic example of an adaptive radiation that includes a range of derived dietary, life history, physiological and neural traits. However, key lineages within the genus, and across the broader Heliconiini tribe, lack genomic resources, limiting our understanding of how adaptive and neutral processes shaped genome evolution during their radiation. Here, we generate highly contiguous genome assemblies for nine Heliconiini, 29 additional reference-assembled genomes, and improve 10 existing assemblies. Altogether, we provide a dataset of annotated genomes for a total of 63 species, including 58 species within the Heliconiini tribe. We use this extensive dataset to generate a robust and dated heliconiine phylogeny, describe major patterns of introgression, explore the evolution of genome architecture, and the genomic basis of key innovations in this enigmatic group, including an assessment of the evolution of putative regulatory regions at the Heliconius stem. Our work illustrates how the increased resolution provided by such dense genomic sampling improves our power to generate and test gene-phenotype hypotheses, and precisely characterize how genomes evolve.
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Cicconardi, Francesco, Edoardo Milanetti, Erika C Pinheiro de Castro, Anyi Mazo-Vargas, Steven M Van Belleghem, Angelo Alberto Ruggieri, Pasi Rastas, Joseph Hanly, et al. (2023). Evolutionary dynamics of genome size and content during the adaptive radiation of Heliconiini butterflies. Nature communications, 14(1). p. 5620. 10.1038/s41467-023-41412-5 Retrieved from https://hdl.handle.net/10161/29975.
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Anyi Mazo-Vargas
Anyi Mazo-Vargas is originally from Cali, Colombia, where she graduated from the Biology program at Universidad del Valle. She then pursued a master’s degree at the University of Puerto Rico in Mayaguez, focusing on weevil beetles and phylogenetics. After moving to the United States, Anyi worked as a laboratory manager at Duke University in Dr. Buchler’s lab, utilizing luciferases to study the cell cycle of Saccharomyces yeast. These experiences inspired her to pursue a PhD in the Entomology Department at Cornell University, where she combined her knowledge in insects, evolution, and genetics to study butterfly color patterning. At Cornell, she investigated genes involved in wing element patterning and their regulation. She later joined George Washington University as a postdoctoral researcher, working on transgenesis projects in both moths and butterflies.
The AMV Laboratory at Duke employs genetics, functional genomics, and developmental biology approaches to untangle the genetic basis of morphological adaptive traits. Our research aims to dissect the underlying developmental processes and place our findings within a micro- and macro-evolutionary framework. We seek to identify genomic and developmental properties, explaining how adaptive traits such as wing patterns and wing shapes involved in mimicry, camouflage, thermoregulation, and other defense mechanisms develop and evolve.
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