01800nas a2200325 4500008004100000245007800041210006900119260001500188300000800203490000600211520078700217100002001004700002001024700001901044700002701063700002001090700002201110700001901132700002401151700002101175700002201196700002001218700001901238700002101257700001701278700001801295700002301313700002001336856011801356 2019 eng d00aYam genomics supports West Africa as a major cradle of crop domestication0 aYam genomics supports West Africa as a major cradle of crop dome c1 May 2019 a1-80 v53 a

While there has been progress in our understanding of the origin and history of agriculture in sub-Saharan Africa,
a unified perspective is still lacking on where and how major crops were domesticated in the region. Here, we
investigated the domestication of African yam (Dioscorea rotundata), a key crop in early African agriculture. Using
whole-genome resequencing and statistical models, we show that cultivated yam was domesticated from a forest
species. We infer that the expansion of African yam agriculture started in the Niger River basin. This result, alongside
with the origins of African rice and pearl millet, supports the hypothesis that the vicinity of the Niger River
was a major cradle of African agriculture.

1 aScarcelli, Nora1 aCubry, Philippe1 aAkakpo, Roland1 aThuillet, Anne-Céline1 aObidiegwu, Jude1 aBaco, Mohamed, N.1 aOtoo, Emmanuel1 aSonké, Bonaventure1 aDansi, Alexandre1 aDjedatin, Gustave1 aMariac, Cédric1 aCouderc, Marie1 aCausse, Sandrine1 aAlix, Karine1 aChaïr, Hâna1 aFrançois, Olivier1 aVigouroux, Yves uhttps://rubiaceae-africa.myspecies.info/content/yam-genomics-supports-west-africa-major-cradle-crop-domestication00623nas a2200157 4500008004100000245007600041210006900117100002900186700002200215700002400237700001900261700002000280700002800300700002000328856011700348 2019 eng d00aComplete plastome sequences of 14 African yam species (Dioscorea spp.).0 aComplete plastome sequences of 14 African yam species Dioscorea 1 aMagwé-Tindo, Jacqueline1 aWieringa, Jan, J.1 aSonké, Bonaventure1 aZapfack, Louis1 aVigouroux, Yves1 aCouvreur, Thomas, L. P.1 aScarcelli, Nora uhttps://rubiaceae-africa.myspecies.info/content/complete-plastome-sequences-14-african-yam-species-dioscorea-spp39698nas a2200325 45000080041000002450113000412100069001543000009002234900008002325203860200240653001738842653002338859653002538882653003138907653001638938653001238954653001438966653002238980100002339002700002339025700001839048700002039066700002139086700003039107700002939137700002039166700002239186700002439208856014039232 2019 eng d00aMine versus Wild: a plant conservation checklist of the rich Iron-Ore Ngovayang Massif Area (South Cameroon)0 aMine versus Wild a plant conservation checklist of the rich Iron a8-290 v1523 a

16.00 Normal 0 21 false false false FR-BE X-NONE X-NONE

Background and aims – The rapid expansion of human activities in South Cameroon, particularly mining in mountainous areas, threatens this region’s exceptional biodiversity. To comprehend the effects of land-use change on plant diversity and identify conservation priorities, we aim at providing a first comprehensive plant checklist of the Ngovayang Massif, focusing on the two richest plant families, Orchidaceae and Rubiaceae.

Location – The Ngovayang Massif Area (NMA) is located in the South Region of Cameroon. It is covered by lowland and submontane rainforest (100 to 1110 m elevation).

Methods – We compiled a dataset of 6116 georeferenced herbarium specimens, of which 2787 belong to Rubiaceae and Orchidaceae. We used rarefaction methods to explore sampling and diversity patterns, and investigated the altitudinal distribution of rare and/or threatened taxa.

Key results – The NMA, which houses about 1500 vascular plant taxa, is the richest documented area for Rubiaceae in Atlantic Central Africa (ACA) and the fifth for Orchidaceae, with respectively 281 and 111 taxa. Among these taxa, 178 (45%) are endemic to ACA and 67 (17%) are considered globally threatened according to IUCN categories and criteria. We show that higher elevation areas (> 750 m), which are also the main areas targeted for mining, are the richest in endangered and/or rare species. Three new records for Cameroon are reported here.

Conclusion – The NMA represents an Important Plant Area of Cameroon as confirmed by its exceptional plant diversity (> 20% of the total Flora of Cameroon), by the concentration of many threatened and/or restricted range species (10 taxa are strict endemics of the massif) as well as by the threat on rare habitats (i.e. the submontane vegetation above ~750 m elevation). A management plan involving in situ and ex situ conservation actions is urgently needed to reduce the potential threats of future mining activities.

10aBiodiversity10aendangered species10aImportant Plant Area10airon and gold exploitation10anew records10aorchids10aRubiaceae10asubmontane forest1 aDroissart, Vincent1 aLachenaud, Olivier1 aDauby, Gilles1 aDessein, Steven1 aKamdem, Gyslène1 aK., Charlemagne, Nguembou1 aSimo-Droissart, Murielle1 aStévart, Tariq1 aTaedoumg, Hermann1 aSonké, Bonaventure uhttps://rubiaceae-africa.myspecies.info/content/mine-versus-wild-plant-conservation-checklist-rich-iron-ore-ngovayang-massif-area-south