Estimates of gene flow from rare alleles in natural populations of medfly Ceratitis capitata (Diptera: Tephritidae)

dc.contributor.author	Kourti, A	en
dc.date.accessioned	2014-06-06T06:45:58Z
dc.date.available	2014-06-06T06:45:58Z
dc.date.issued	2004	en
dc.identifier.issn	00074853	en
dc.identifier.uri	http://dx.doi.org/10.1079/BER2004324	en
dc.identifier.uri	http://62.217.125.90/xmlui/handle/123456789/2744
dc.subject.other	allele	en
dc.subject.other	fly	en
dc.subject.other	gene flow	en
dc.subject.other	geographical variation	en
dc.subject.other	population genetics	en
dc.subject.other	allele	en
dc.subject.other	animal	en
dc.subject.other	article	en
dc.subject.other	climate	en
dc.subject.other	female	en
dc.subject.other	gene frequency	en
dc.subject.other	genetic drift	en
dc.subject.other	genetic variability	en
dc.subject.other	genetics	en
dc.subject.other	male	en
dc.subject.other	Mediterranean fruit fly	en
dc.subject.other	Alleles	en
dc.subject.other	Animals	en
dc.subject.other	Ceratitis capitata	en
dc.subject.other	Climate	en
dc.subject.other	Female	en
dc.subject.other	Gene Frequency	en
dc.subject.other	Genetic Drift	en
dc.subject.other	Male	en
dc.subject.other	Variation (Genetics)	en
dc.subject.other	Animalia	en
dc.subject.other	Capitata	en
dc.subject.other	Ceratitis	en
dc.subject.other	Ceratitis capitata	en
dc.subject.other	Diptera	en
dc.subject.other	Drosophila melanogaster	en
dc.subject.other	Insecta	en
dc.subject.other	Tephritidae	en
dc.title	Estimates of gene flow from rare alleles in natural populations of medfly Ceratitis capitata (Diptera: Tephritidae)	en
heal.type	journalArticle	en
heal.identifier.primary	10.1079/BER2004324	en
heal.publicationDate	2004	en
heal.abstract	Gene flow based on the spatial distribution of rare alleles at 25 gene loci was estimated in 15 populations of Ceratitis capitata (Wiedemann) from different parts of the world. Estimates of Nm, the number of migrants exchanged per generation among populations in different regions of the world, appeared to be quite similar, ranging from 3.36 in tropical Africa to 2.94 in the New World and 2.72 in Mediterranean basin populations. This suggests that gene flow among neighbouring populations of medfly is quite extensive. The genetic differentiation in American, Mediterranean and African populations was related to major climatic differences between North and South. These differences arise mainly from five loci that showed gene frequency patterns suggestive of latitudinal clines in allele frequencies. The clinal variation was such that tropical-subtropical populations were more heterozygous than temperate populations. It was concluded that gene flow, counteracting the forces of natural selection and genetic drift, determines the extent to which geographical populations of C. capitata are differentiated.	en
heal.journalName	Bulletin of Entomological Research	en
dc.identifier.issue	5	en
dc.identifier.volume	94	en
dc.identifier.doi	10.1079/BER2004324	en
dc.identifier.spage	449	en
dc.identifier.epage	456	en