The Diachasmimorpha longicaudata complex: Reproductive isolation and geometric patterns of the wing |
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Authors: | Sangvorn Kitthawee Jean-Pierre Dujardin |
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Institution: | aDepartment of Biology, Faculty of Science, Mahidol University, Rama VI Rd., Bangkok 10400, Thailand;bCenter of Excellence for Vectors and Vector-borne Diseases (CVVD), Faculty of Sciences, Mahidol University, Thailand;cUMR IRD–CNRS 2724, Agropolis, 911, BP 64501, 34394 Montpellier, France |
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Abstract: | Diachasmimorpha longicaudata is an endoparasitoid of Tephritid fruit fly larvae and is regarded as an important biocontrol agent. However, it is likely that under this specific name several biological species may be contained, the correct identification of which is essential for effective use in control programs. In this paper, three populations (DLA, DLB and DLBB) of D. longicaudata designated according to geography and/or natural hosts were reared in the same laboratory. They were tested for reproductive compatibility and characterized by morphometric analyzes. Forced-contact mating technique showed either complete lack of inter-population reproductive compatibility or the production of rare, sterile female offspring. The three populations, indistinguishable on the basis of morphological characters alone, were readily identified by the geometry of the wing. Results strongly suggest that the DLA, DLB and DLBB are distinct biological species, and highlight the usefulness of wing geometry to distinguish them. |
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Keywords: | Diachasmimorpha longicaudata Thailand Cryptic species Crossing experiments Morphometrics |
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