Research Article

Genomic architecture and introgression shape a butterfly radiation

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Science  01 Nov 2019:
Vol. 366, Issue 6465, pp. 594-599
DOI: 10.1126/science.aaw2090

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Following gene flow in butterfly genomes

The role of hybridization in evolution and species radiations has long been debated. In Heliconius butterflies, introgression was a major factor in their radiation, and the genetic variation it imparted into species is variable across the genome. Edelman et al. developed a new sequencing strategy and produced 20 Heliconius genomes (see the Perspective by Rieseberg). They also developed a means by which to identify genetic variation that originates from incomplete lineage sorting versus hybridization. Applying this model to their newly developed genomes, they investigated the evolutionary history of the genus and, in particular, the impact of introgression.

Science, this issue p. 594; see also p. 570

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