Clinal genetic variation and the 'rare allele phenomenon' in random mating populations of Urophora cardui (Diptera: Tephritidae).

Abstract excerpt

In the present study we investigate a contact zone between two population groups of the tephritid fly Urophora cardui. We investigate scenarios that may have produced the genetic differentiation of the two groups, and we describe the 'rare allele phenomenon' from the contact zone. The rare allele phenomenon refers to alleles that are found at high frequency in contact zones but are rare or lacking outside the...

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