Area de Entomología Médica, Centro Universitario del Sur, Universidad de Guadalajara, 49000 Ciudad Guzmán, Jalisco, México.
J Med Entomol. 2011 May;48(3):705-7. doi: 10.1603/me10159.
Reproductive isolation between Triatoma mexicana (Herrich-Scaeffer) and the six species of the Phyllosoma complex, belonging to the genus Meccus, was examined by analyzing the fertility of experimental hybrids. The percentage of couples with offspring was highest in the set of crosses between Meccus phyllosomus (Burmeister) and T. mexicana, and lowest in those between Meccus pallidipennis (Stål) and Meccus bassolsae (Alejandre-Aguilar, Nogueda-Torres, Cortés-Jiménez, Jurberg, Galvão, and Carcavallo) with respect to T. mexicana. Crosses between Meccus mazzottii (Usinger), Meccus picturatus (Usinger), and Meccus longipennis (Usinger) and T. mexicana had scarce offspring, whereas offspring from crosses between M. phyllosomus and T. mexicana were abundant. However, all F1 nymphs died in different instars before reaching sexual maturity. The biological evidence in this study suggests that different degrees of reproductive isolation exist between T mexicana and the different species of Meccus. Our data also support the current status of T. mexicana as a separate species.
我们通过分析实验杂种的育性来研究墨西哥丽蝇（Herrich-Scaeffer）与叶蝉属的 6 个 Phyllosoma 复合体种之间的生殖隔离。在 Meccus phyllosomus（Burmeister）与 T. mexicana 之间的杂交组合中，有后代的夫妇比例最高，而在 Meccus pallidipennis（Stål）和 Meccus bassolsae（Alejandre-Aguilar、Nogueda-Torres、Cortés-Jiménez、Jurberg、Galvão 和 Carcavallo）与 T. mexicana 之间的杂交组合中，有后代的夫妇比例最低。Meccus mazzottii（Usinger）、Meccus picturatus（Usinger）和 Meccus longipennis（Usinger）与 T. mexicana 之间的杂交只产生少量后代，而 M. phyllosomus 和 T. mexicana 之间的杂交产生的后代则很多。然而，所有 F1 若虫在达到性成熟之前的不同龄期死亡。本研究的生物学证据表明，T mexicana 与不同的 Meccus 种之间存在不同程度的生殖隔离。我们的数据还支持将 T. mexicana 作为一个独立物种的现状。
