INVESTIGADORES
SEGURA Diego Fernando
artículos
Título:
Assortative mating among Anastrepha fraterculus (Diptera: Tephritidae) hybrids as a possible route to radiation of the fraterculus cryptic species complex
Autor/es:
DIEGO F. SEGURA; M. TERESA VERA; JUAN RULL; V WORNOAYPORN; A ISLAM; ALAN ROBINSON
Revista:
BIOLOGICAL JOURNAL OF THE LINNEAN SOCIETY
Editorial:
WILEY-BLACKWELL PUBLISHING, INC
Referencias:
Año: 2011 p. 346 - 354
ISSN:
0024-4066
Resumen:
Reproductive isolation among populations of Anastrepha fraterculus has been found acting at the pre- and
post-zygotic levels. Differences in timing of sexual activity and male sexual pheromone composition among
populations could partially account for prezygotic isolation. Hybrid males were found to produce a novel pheromone,
which is a mix of parental pheromones. In the present study, we found that the hybrid females showed a
significant preference to mate with hybrid males than with parental males. Male location during pheromone
emission is associated with its reproductive success and, thus, differences in the location of males during courtship
could also play a role in isolation. We found evidence that reproductive isolation is also related to the location of
males during courtship. Hybrid male behaviour regarding location during pheromone release was found to be
influenced by the maternal lineage. If these populations hybridized in the field, the hybrid females would tend to
mate with hybrid males probably leading to the formation of a new entity within the A. fraterculus complex. This
simple and fast process could be one reason explaining the high number of taxonomic entities within this complex.
Further studies on other members of the fraterculus species group may reveal whether this can be considered as
an example of homoploid hybrid speciation.