TY - JOUR
T1 - Biological and genetic aspects of experimental hybrids from species of the Phyllosoma complex (Hemiptera: Reduviidae: Triatominae)
AU - Martínez-Ibarra, José Alejandro
AU - Ventura-Rodríguez, Luz Verónica
AU - Meillon-Isais, Karla
AU - Barajas-Martínez, Héctor
AU - Alejandre-Aguilar, Ricardo
AU - Lupercio-Coronel, Patricia
AU - Rocha-Chávez, Gonzalo
AU - Nogueda-Torres, Benjamín
PY - 2008/5
Y1 - 2008/5
N2 - The present work is a thorough investigation of the degree of reproductive isolation between Meccus mazzottii and Meccus longipennis, Meccus picturatus, Meccus pallidipennis and Meccus bassolsae, 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.
AB - The present work is a thorough investigation of the degree of reproductive isolation between Meccus mazzottii and Meccus longipennis, Meccus picturatus, Meccus pallidipennis and Meccus bassolsae, 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.
KW - Hybrids
KW - Phyllosoma complex
KW - Phylogenetic level
KW - Reproductive isolation
UR - http://www.scopus.com/inward/record.url?scp=46749102166&partnerID=8YFLogxK
U2 - 10.1590/S0074-02762008000300002
DO - 10.1590/S0074-02762008000300002
M3 - Artículo
C2 - 18592097
AN - SCOPUS:46749102166
SN - 0074-0276
VL - 103
SP - 236
EP - 243
JO - Memorias do Instituto Oswaldo Cruz
JF - Memorias do Instituto Oswaldo Cruz
IS - 3
ER -