Details

Autor(en) / Beteiligte

• Garzón‐Orduña, Ivonne J.
• Brower, Andrew V. Z.

Titel

Quantified reproductive isolation in Heliconius butterflies: Implications for introgression and hybrid speciation

Ist Teil von

• Ecology and evolution, 2018-01, Vol.8 (2), p.1186-1195

Ort / Verlag

England: John Wiley & Sons, Inc

Erscheinungsjahr

2018

Link zum Volltext

Quelle

Free E-Journal (出版社公開部分のみ）

Beschreibungen/Notizen

• Heliconius butterflies have become a model for the study of speciation with gene flow. For adaptive introgression to take place, there must be incomplete barriers to gene exchange that allow interspecific hybridization and multiple generations of backcrossing. The recent publication of estimates of individual components of reproductive isolation between several species of butterflies in the Heliconius melpomene–H. cydno clade allowed us to calculate total reproductive isolation estimates for these species. According to these estimates, the butterflies are not as promiscuous as has been implied. Differences between species are maintained by intrinsic mechanisms, while reproductive isolation of geographical races within species is mainly due to allopatry. We discuss the implications of this strong isolation for basic aspects of the hybrid speciation with introgression hypothesis. For hybridization and introgression to take place, there must be opportunities for interspecific mating. We quantified total reproductive isolation between various races of the Heliconius melpomene–H. cydno clade and found that the species are completely or almost completely reproductively isolated. This suggests that hypotheses supporting introgression of mimetic wing patterns among clades, as well as the homoploid hybrid origin of Heliconius species, are unparsimonious.