@article{fdi:010040821,
  title = {{G}enetic structure and gene flow in {F}rench populations of two {O}strinia taxa : host races or sibling species?},
  author = {{M}alausa, {T}. and {D}alecky, {A}mbroise and {P}onsard, {S}. and {A}udiot, {P}. and {S}treiff, {R}. and {C}haval, {Y}. and {B}ourguet, {D}.},
  editor = {},
  language = {{ENG}},
  abstract = {{M}ost models of ecological speciation concern phytophagous insects in which speciation is thought to be driven by host shifts and subsequent adaptations of populations. {D}espite the ever-increasing number of studies, the current evolutionary status of most models remains incompletely resolved, as estimates of gene flow between taxa remain extremely rare. {W}e studied the population genetics of two taxa of the {O}strinia genus - one feeding mainly on maize and the other on mugwort and hop - occurring in sympatry throughout {F}rance. {T}he actual level of divergence of these taxa was unknown because the genetic structure of populations had been investigated over a limited geographical area and the magnitude of gene flow between populations had not been estimated. {W}e used 11 microsatellite markers to investigate the genetic structure of populations throughout {F}rance and the extent of gene flow between the two {O}strinia taxa at several sites at which they are sympatric. {W}e observed clear genetic differentiation between most populations collected on the typical respective hosts of each taxon. {H}owever, populations displaying intermediate allelic frequencies were found on hop plants in southern {F}rance. {I}ndividual assignments revealed that this result could be accounted for by the presence of both taxa on the same host. {G}ene flow, estimated by determining the proportion of hybrids detected, was low: probably < 1% per generation, regardless of site. {T}his indicates that the two {O}strinia taxa have reached a high level of genetic divergence and should be considered sibling species rather than host races.},
  keywords = {{B}ayesian approaches ; ecological speciation ; {E}uropean corn borer ; gene flow ; host race ; hybridization ; microsatellites ; {O}strinia nubilalis ; {O}strinia scapulalis ; sympatric speciation ; {FRANCE}},
  booktitle = {},
  journal = {{M}olecular {E}cology},
  volume = {16},
  numero = {20},
  pages = {4210--4222},
  ISSN = {0962-1083},
  year = {2007},
  DOI = {10.1111/j.1365-294{X}.2007.03457.x},
  URL = {https://www.documentation.ird.fr/hor/fdi:010040821},
}