| Title: | Geographic contrasts between pre- and postzygotic barriers are consistent with reinforcement in Heliconius butterflies |
| Author(s): | Rosser N; Queste LM; Cama B; Edelman NB; Mann F; Mori Pezo R; Morris J; Segami C; Velado P; Schulz S; Mallet JLB; Dasmahapatra KK; |
| Address: | "Department of Biology, University of York, Wentworth Way, Heslington, YO10 5DD, United Kingdom. Department of Organismic and Evolutionary Biology, Harvard University, Cambridge, Massachusetts, 02138. Institut fur Organische Chemie, Technische Universitat Braunschweig, Hagenring 30, 38106, Braunschweig, Germany. URKU Estudios Amazonicos, Jr. Saposoa 181, Tarapoto, San Martin, Peru. Department of Ecology and Genetics, Uppsala University, Norbyvagen 18d, 75236, Uppsala, Sweden. Department for Quality Assurance Analytics, Bavarian State Research Center for Agriculture, Lange Point 6, 85354, Freising, Germany" |
| ISSN/ISBN: | 1558-5646 (Electronic) 0014-3820 (Print) 0014-3820 (Linking) |
| Abstract: | "Identifying the traits causing reproductive isolation and the order in which they evolve is fundamental to understanding speciation. Here, we quantify prezygotic and intrinsic postzygotic isolation among allopatric, parapatric, and sympatric populations of the butterflies Heliconius elevatus and Heliconius pardalinus. Sympatric populations from the Amazon (H. elevatus and H. p. butleri) exhibit strong prezygotic isolation and rarely mate in captivity; however, hybrids are fertile. Allopatric populations from the Amazon (H. p. butleri) and Andes (H. p. sergestus) mate freely when brought together in captivity, but the female F1 hybrids are sterile. Parapatric populations (H. elevatus and H. p. sergestus) exhibit both assortative mating and sterility of female F1s. Assortative mating in sympatric populations is consistent with reinforcement in the face of gene flow, where the driving force, selection against hybrids, is due to disruption of mimicry and other ecological traits rather than hybrid sterility. In contrast, the lack of assortative mating and hybrid sterility observed in allopatric populations suggests that geographic isolation enables the evolution of intrinsic postzygotic reproductive isolation. Our results show how the types of reproductive barriers that evolve between species may depend on geography" |
| Keywords: | "Animals Bolivia Brazil Butterflies/*physiology Climate Ecosystem Female French Guiana *Gene Flow *Genetic Speciation Geography Hybridization, Genetic Male Peru Phenotype Pheromones Reproduction/genetics *Reproductive Isolation Sexual Behavior, Animal Spec;" |
| Notes: | "MedlineRosser, Neil Queste, Lucie M Cama, Bruna Edelman, Nathaniel B Mann, Florian Mori Pezo, Ronald Morris, Jake Segami, Carolina Velado, Patricia Schulz, Stefan Mallet, James L B Dasmahapatra, Kanchon K eng Schu984/12-1/Deutsche Forschungsgemeinschaft/International NE/K012886/1/Natural Environment Research Council/International Research Support, Non-U.S. Gov't 2019/07/25 Evolution. 2019 Sep; 73(9):1821-1838. doi: 10.1111/evo.13804" |
