@article{fdi:010079436,
  title = {{P}lastome phylogeography in two {A}frican rain forest legume trees reveals that {D}ahomey {G}ap populations originate from the {C}ameroon volcanic line},
  author = {{D}emenou, {B}. {B}. and {M}igliore, {J}. and {H}euertz, {M}. and {M}onthe, {F}. {K}. and {O}jeda, {D}. {I}. and {W}ieringa, {J}. {J}. and {D}auby, {G}illes and {A}lbreht, {L}. and {B}oom, {A}. and {H}ardy, {O}. {J}.},
  editor = {},
  language = {{ENG}},
  abstract = {{P}aleo-environmental data show that the distribution of {A}frican rain forests was affected by {Q}uaternary climate changes. {I}n particular, the {D}ahomey {G}ap ({DG}) - a 200 km wide savanna corridor currently separating the {W}est {A}frican and {C}entral {A}frican rain forest blocks and containing relict rain forest fragments - was forested during the mid-{H}olocene and possibly during previous interglacial periods, whereas it was dominated by open vege-tation (savanna) during glacial periods. {G}enetic signatures of past population fragmentation and demographic changes have been found in some {A}frican forest plant species using nuclear markers, but such events appear not to have been synchronous or shared across species. {T}o better understand the colonization history of the {DG} by rain forest trees through seed dispersal, the plastid genomes of two widespread {A}frican forest legume trees, {A}nthonotha macrophylla and {D}istemonanthus benthamianus, were sequenced in 47 individuals for each species, providing unprecedented phylogenetic resolution of their maternal lineages (857 and 115 {SNP}s, respectively). {B}oth species exhibit distinct lineages separating three regions: 1. {U}pper {G}uinea ({UG}, i.e. the {W}est {A}frican forest block), 2. the area ranging from the {DG} to the {C}ameroon volcanic line ({CVL}), and 3. {L}ower {G}uinea ({LG}, the western part of the {C}entral {A}frican forest block) where three lineages co-occur. {I}n both species, the {DG} popu-lations (including southern {N}igeria west of {C}ross {R}iver) exhibit much lower genetic diversity than {UG} and {LG} populations, and their plastid lineages originate from the {CVL}, confirming the role of the {CVL} as an ancient forest refuge. {D}espite the similar phylogeographic structures displayed by {A}. macrophylla and {D}. benthamianus, mo-lecular dating indicates very contrasting ages of lineage divergence ({UG} diverged from {LG} since c. 7 {M}a and 0.7 {M}a, respectively) and {DG} colonization (probably following the {M}id {P}leistocene {T}ransition and the {L}ast {G}lacial {M}aximum, respectively). {T}he stability of forest refuge areas and repeated similar forest shrinking/ex-panding events during successive glacial periods might explain why similar phylogeographic patterns can be generated over contrasting timescales.},
  keywords = {{A}frican rain forest ; {C}ameroon volcanic line ; {C}olonization origin ; {D}ahomey gap ; {P}hylogeography ; {P}lastid genome sequencing ; {AFRIQUE} {DE} {L}'{OUEST} ; {AFRIQUE} {CENTRALE} ; {CAMEROUN} ; {GABON} ; {BENIN} ; {NIGERIA} ; {ZONE} {GUINEENNE} ; {COULOIR} {DAHOMEEN}},
  booktitle = {},
  journal = {{M}olecular {P}hylogenetics and {E}volution},
  volume = {150},
  numero = {},
  pages = {art. 106854 [12p.]},
  ISSN = {1055-7903},
  year = {2020},
  DOI = {10.1016/j.ympev.2020.106854},
  URL = {https://www.documentation.ird.fr/hor/fdi:010079436},
}