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dc.contributor.authorLushai, Gugsen_UK
dc.contributor.authorSmith, David A Sen_UK
dc.contributor.authorGordon, Ian Jen_UK
dc.contributor.authorGoulson, Daveen_UK
dc.contributor.authorAllen, John Aen_UK
dc.contributor.authorMaclean, Normanen_UK
dc.description.abstractSubspecies chrysippus, dorippus and alcippus of the butterfly Danaus chrysippus differ at three biallelic colour gene loci. They have partially vicariant distributions, but their ranges overlap over a substantial part of central and East Africa, where hybridism is commonplace. We now report that the West African subspecies alcippus differs from other subspecies, not only in nuclear genotype but also in mitochondrial haplotype in both allopatry and sympatry. The maintenance of concordant nuclear and cytoplasmic genetic differences in sympatry, and in the face of hybridisation, is prima facie evidence for sexual isolation. Other evidence that suggests alcippus may be isolated from chrysippus and dorippus include differences in sex ratio (SR), heterozygote deficiency at one site and deduced differences in patterns of migration. We suggest that, within the hybrid zone, differential infection of subspecies by a male-killing Spiroplasma bacterium causes SR differences that restrict female choice, triggering rounds of heterotypic mating and consequent heterozygote excess that is largely confined to females. The absence of these phenomena from hybrid populations that test negative for Spiroplasma supports the hypothesis. The incomplete sexual isolation and partial vicariance of alcippus suggests that it is a nascent species.en_UK
dc.publisherNature Publishing Groupen_UK
dc.relationLushai G, Smith DAS, Gordon IJ, Goulson D, Allen JA & Maclean N (2003) Incomplete sexual isolation in sympatry between subspecies of the butterfly Danaus chrysippus (L.) and the creation of a hybrid zone. Heredity, 90 (3), pp. 236-246.
dc.rightsThe publisher does not allow this work to be made publicly available in this Repository. Please use the Request a Copy feature at the foot of the Repository record to request a copy directly from the author. You can only request a copy if you wish to use this work for your own research or private study.en_UK
dc.subjectDanaus chrysippusen_UK
dc.subjectheterozygote excessen_UK
dc.subjectsexual isolationen_UK
dc.titleIncomplete sexual isolation in sympatry between subspecies of the butterfly Danaus chrysippus (L.) and the creation of a hybrid zoneen_UK
dc.typeJournal Articleen_UK
dc.rights.embargoreason[goulson_incompletesexualisolation_2003.pdf] The publisher does not allow this work to be made publicly available in this Repository therefore there is an embargo on the full text of the work.en_UK
dc.type.statusVoR - Version of Recorden_UK
dc.contributor.affiliationUniversity of Southamptonen_UK
dc.contributor.affiliationThe Natural History Museumen_UK
dc.contributor.affiliationInternational Centre for Insect Physiology and Ecology (ICIPE)en_UK
dc.contributor.affiliationBiological and Environmental Sciencesen_UK
dc.contributor.affiliationUniversity of Southamptonen_UK
dc.contributor.affiliationUniversity of Southamptonen_UK
rioxxterms.typeJournal Article/Reviewen_UK
local.rioxx.authorLushai, Gugs|en_UK
local.rioxx.authorSmith, David A S|en_UK
local.rioxx.authorGordon, Ian J|en_UK
local.rioxx.authorGoulson, Dave|en_UK
local.rioxx.authorAllen, John A|en_UK
local.rioxx.authorMaclean, Norman|en_UK
local.rioxx.projectInternal Project|University of Stirling|
Appears in Collections:Biological and Environmental Sciences Journal Articles

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