Ongoing speciation within the Anastrepha fraterculus cryptic species complex: the case of the Andean morphotype

DEVESCOVI, F.; ABRAHAM SOLANA; RORIZ, A. KELLY; NOLAZCO, NORMA; CASTAÑEDA, ROSARIO; TADEO, EDUARDO; CACERES, CARLOS; SEGURA DIEGO; VERA MARIA TERESA; JOACHIM BRAVO, IARA; CANAL, NELSON; RULL JUAN

ENTOMOLOGIA EXPERIMENTALIS ET APPLICATA

WILEY-BLACKWELL PUBLISHING, INC

Lugar: Londres; Año: 2014 vol. 152 p. 238 - 247

0013-8703

The Anastrephafraterculus cryptic species complex is currently composed of seventaxonomically recognized morphotypes. Both prezygotic and postzygotic isolationhas been documented among four of these morphotypes revealing that in fact theyappear to be distinct biological entities. In order to progress in the fulldelimitation of species within the complex we examined reproductive isolationbetween a Colombian population of the Andean morphotype and populationsbelonging to four other morphotypes spanning from Mexico to Argentina. Fliesfrom the Andean morphotype exhibited strong prezygotic mating isolation throughtemporal partition of mating activity. Postzygotic isolation was observed forcrosses of males of all morphotypes and Andean morphotype females, yet most of theF1 hybrid ?? x F1 hybrid ?? self crosses showed normal levels of fertility, a finding suggesting a nuclear cytoplasmic interactionaccording to previous studies. Overall,the Andean morphotype within the complex also appears to be a distinctbiological entity. We discuss the implications of these findings for theunderstanding of speciation mechanisms in the Neotropical genus Anastrepha.