@article{fdi:010037996,
  title = {{I}ntrogressive hybridization between the allotetraploid {C}offea arabica and one of its diploid ancestors, {C}offea canephora, in an exceptional sympatric zone in {N}ew {C}aledonia},
  author = {{M}ah{\'e}, {L}aetitia and {L}e {P}ierres, {D}aniel and {C}ombes, {M}arie-{C}hristine and {L}ashermes, {P}hilippe},
  editor = {},
  language = {{ENG}},
  abstract = {{T}he importance of introgressive hybridization in plant evolution has long been recognized. {N}evertheless, information on gene flow between allopolyploids and their diploid relatives is very limited, even though gene flow could play a major role in polyploid establishment and evolution. {H}ere, we investigated the processes governing hybrid formation and introgression between the allotetraploid {C}offea arabica and one of its ancestral diploid progenitors, {C}. canephora, in a sympatric zone of {N}ew {C}aledonia. {T}he occurrence of a large assortment of hybridization events between the 2 coffee species is clearly established. {F}irst-generation hybrids ({FI}) and post-{F}-1 hybrids were characterized. {T}he involvement of unreduced gametes of {C}. canephora is suggested, because tetraploid {F}-1 hybrid plants were detected. {M}oreover, although bidirectional mating was observed, only unidirectional gene flow from {C} canephora to {C}. arabica was noted in post-{F}-1 hybrids. {M}ost of the collected post-{F}1 hybrid plants exhibited a high level of introgression, and the frequency of introgression observed among the different analyzed loci was homogeneous, suggesting no significant counterselection against introgressions from {C} canephora. {O}verall, the {N}ew {C}aledonian central mountains appear to be a highly favourable environment for introgressive hybridization and a genetic diversity center for {C}. arabica.},
  keywords = {allopolyploid ; interspecific hybrids ; introgression ; diversity ; molecular marker ; coffee},
  booktitle = {},
  journal = {{G}enome},
  volume = {50},
  numero = {3},
  pages = {316--324},
  ISSN = {0831-2796},
  year = {2007},
  DOI = {10.1139/{G}07-011},
  URL = {https://www.documentation.ird.fr/hor/fdi:010037996},
}