Patterns of Variation Within and Between Greek Populations of Ceratitis capitata Suggest Extensive Gene Flow and Latitudinal Clines

2004 ◽  
Vol 97 (3) ◽  
pp. 1186-1190 ◽  
Author(s):  
Anna Kourti
Keyword(s):  
Gene Flow ◽  
Ceratitis Capitata ◽  
Latitudinal Clines

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

2004 ◽  
Vol 94 (5) ◽  
pp. 449-456 ◽  
Author(s):  
A. Kourti
Keyword(s):  
Gene Flow ◽  
Ceratitis Capitata ◽  
Natural Populations ◽  
Clinal Variation ◽  
African Populations ◽  
The World ◽  
Rare Alleles ◽  
Geographical Populations ◽  
Latitudinal Clines ◽  
North And South

AbstractGene 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.

scholarly journals Genetic variability and gene flow in geographical populations of Ceratitis capitata (Wied.) (medfly)

Heredity ◽  
1991 ◽  
Vol 67 (3) ◽  
pp. 347-356 ◽  
Author(s):  
Giuliano Gasperi ◽  
Carmela R Guglielmino ◽  
Anna R Malacrida ◽  
Riccardo Milani
Keyword(s):  
Gene Flow ◽  
Genetic Variability ◽  
Ceratitis Capitata ◽  
Geographical Populations

Great Wall blocks gene flow

Nature ◽  
2003 ◽  
Author(s):  
HelenR. Pilcher
Keyword(s):  
Gene Flow ◽  
Great Wall

Differentiation and Interrelations of Two Representatives of Laudakia stellio Complex (Reptilia: Agamidae) in Israel

2011 ◽  
Vol 4 (2) ◽  
pp. 102-114 ◽  
Author(s):  
Evgenyi N. Panov ◽  
Larissa Yu. Zykova
Keyword(s):  
Population Structure ◽  
Gene Flow ◽  
Habitat Preference ◽  
Additional Data ◽  
Near East ◽  
Field Studies ◽  
Subspecies Level ◽  
Limited Gene Flow ◽  
Study Sites ◽  
And Behavior

Field studies were conducted in Central Negev within the breeding range of Laudakia stellio brachydactyla and in NE Israel (Qyriat Shemona) in the range of an unnamed form (tentatively “Near-East Rock Agama”), during March – May 1996. Additional data have been collected in Jerusalem at a distance of ca. 110 km from the first and about 170 km from the second study sites. A total of 63 individuals were caught and examined. The animals were marked and their subsequent movements were followed. Social and signal behavior of both forms were described and compared. Lizards from Negev and Qyriat Shemona differ from each other sharply in external morphology, habitat preference, population structure, and behavior. The differences obviously exceed the subspecies level. At the same time, the lizards from Jerusalem tend to be intermediate morphologically between those from both above-named localities, which permits admitting the existence of a limited gene flow between lizard populations of Negev and northern Israel. The lizards from NE Israel apparently do not belong to the nominate subspecies of L. stellio and should be regarded as one more subspecies within the species.

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