Examination of contact zones between closely related species is important for understanding speciation, because the interactions in such zones may change the evolutionary direction of one or both taxa. To expose the composition and dynamics of a contact zone between two dove species, Streptopelia vinacea and S. capicola, we used mitochondrial DNA, amplified fragment-length polymorphism (AFLP) markers, and morphological and color measurements. We combined a field study on contact-zone and parental-species individuals with an examination of F1 hybrids reared in captivity. We found that the contact zone is a narrow hybrid zone characterized by a high frequency of hybrids, a lack of clear parental species forms, a high incidence of S. capicola mtDNA, and an AFLP marker distribution more similar to that of S. vinacea. In morphology and color, field hybrids were more similar to S. vinacea and significantly different from S. capicola. F1 hybrids were more similar to S. capicola in color. The laboratory data showed that both types of mixed matings produced viable F1 offspring. Taken together, the results indicate the existence of a unimodal hybrid zone with asymmetric introgression from S. capicola into S. vinacea. The origin of this hybrid zone is most likely a combination of geographic and behavioral factors and suggests a balance between dispersal and selection.
You have requested a machine translation of selected content from our databases. This functionality is provided solely for your convenience and is in no way intended to replace human translation. Neither BioOne nor the owners and publishers of the content make, and they explicitly disclaim, any express or implied representations or warranties of any kind, including, without limitation, representations and warranties as to the functionality of the translation feature or the accuracy or completeness of the translations.
Translations are not retained in our system. Your use of this feature and the translations is subject to all use restrictions contained in the Terms and Conditions of Use of the BioOne website.
Vol. 127 • No. 3