title: Homoploid hybrid speciation in an extreme habitat.
abstract: According to theory, homoploid hybrid speciation, which is hybrid speciation without a change in chromosome number, is facilitated by adaptation to a novel or extreme habitat. Using molecular and ecological data, we found that the alpine-adapted butterflies in the genus Lycaeides are the product of hybrid speciation. The alpine populations possess a mosaic genome derived from both L. melissa and L. idas and are differentiated from and younger than their putative parental species. As predicted, adaptive traits may allow for persistence in the environmentally extreme alpine habitat and reproductively isolate these populations from their parental species.
authors.affiliation: Department of Biology, Population and Conservation Biology Program, Texas State University, San Marcos, TX 78666, USA.
authors.forename: Zachariah
authors.initials: Z
authors.lastname: Gompert
authors.forename: James A
authors.initials: JA
authors.lastname: Fordyce
authors.forename: Matthew L
authors.initials: ML
authors.lastname: Forister
authors.forename: Arthur M
authors.initials: AM
authors.lastname: Shapiro
authors.forename: Chris C
authors.initials: CC
authors.lastname: Nice
mesh_terms: D000222:Adaptation, Physiological; D000483:Alleles; D000531:Altitude; D000818:Animals; D027883:Astragalus Plant; D001499:Bayes Theorem; D002080:Butterflies / Q000033:anatomy & histology / Q000235:genetics* / Q000502:physiology; D017753:Ecosystem; D005260:Female; D051456:Gene Flow; D049810:Genetic Speciation; D016678:Genome; D005843:Geography; D006824:Hybridization, Genetic; D008297:Male; D018895:Microsatellite Repeats; D009656:North America; D011003:Ploidies; D012098:Reproduction