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Memórias do Instituto Oswaldo Cruz
Fundação Oswaldo Cruz, Fiocruz
ISSN: 1678-8060
EISSN: 1678-8060
Vol. 103, No. 3, 2008
Bioline Code: oc08040
Full paper language: English
Document type: Research Article
Document available free of charge

Memórias do Instituto Oswaldo Cruz, Vol. 103, No. 3, 2008

 en Biological and genetic aspects of experimental hybrids from species of the Phyllosoma complex (Hemiptera: Reduviidae: Triatominae)
Martínez-Ibarra, José Alejandro; Ventura-Rodríguez, Luz Verónica; Meillon-Isais, Karla; Barajas-Martínez, Héctor; Alejandre-Aguilar, Ricardo; Lupercio-Coronel, Patricia; Rocha-Chávez, Gonzalo & Nogueda-Torres, Benjamín

Abstract

The present work is a thorough investigation of the degree of reproductive isolation between Meccus mazzottii check for this species in other resources and Meccus longipennis check for this species in other resources , Meccus picturatus check for this species in other resources , Meccus pallidipennis check for this species in other resources and Meccus bassolsae check for this species in other resources , as well as between M. longipennis and M. picturatus . We examined fertility and segregation of morphological characteristics in two generations of hybrids derived from crosses between these species. The percentage of pairs with (fertile) offspring was highest in the set of crosses between M. longipennis and M. picturatus, and lowest between M. mazzottii and M. picturatus. Most first-generation (F1) individuals from crosses involving M. mazzottii were morphologically similar to this species, while only F1 x F1 progeny of parental crosses between M. mazzottii and M. longipennis had offspring second generation that looked like M. mazzottii. The results indicate that different degrees of reproductive isolation apparently exist among the species of the Phyllosoma complex examined in this study. The biological evidence obtained in this study does not support the proposal that M. longipennis and M. picturatus are full species. It could indicate on the contrary, that both could be considered as subspecies of a single polytypic species. On the other hand, biological evidence supports the proposal that M. mazzottii is a full species.

Keywords
Phyllosoma complex - reproductive isolation - hybrids - phylogenetic level

 
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