Renno Jean-François auteur aut IRD Schmelzer G. auteur aut IRD De Jong J.H. auteur aut IRD text journalArticle eng text/pdf reformatted digital access Pennisetum sect. Brevivalvula is a species complex characterized by polyploidy and apoximis. Ploidy level was assessed by DAPI-flow cytometry for 304 plants of the section, originating from Burkina Faso, Benin and southern Niger. The results were confirmed for 54 plants based on chromosome counts. The samples show four euploidy levels (with x = 9) distributed among five species : P. hordeoides (2n = 36, 54), P. pedicellatum (2n = 36, 45, 54), P. polystachion (2n = 18, 36, 45, 54), P. setosum (2n = 54), and P. subangustum (2n = 18, 36, 54). The geographical distribution of these ploidy levels seems related to major vegetation zones present in Africa. Diploid populations of P. polystachion and P. subangustum were found in the Banfora area, in Burkina Faso. (Résumé d'auteur) specialized RESSOURCES VEGETALES SPONTANEES POLYPLOIDE APOMIXIE REPARTITION GEOGRAPHIQUE COMPLEXE D'ESPECES BURKINA FASO BENIN 076AMEPLA06 198 89-100 1995 0378-2697 https://www.documentation.ird.fr/hor/fdi:010012144 10.1007/BF00985108 0378-2697 [F B010012144] https://www.documentation.ird.fr/hor/fdi:010012144 https://horizon.documentation.ird.fr/exl-doc/pleins_textes/pleins_textes_6/b_fdi_47-48/010012144.pdf IRD - Base Horizon / Pleins textes 1997-12-08 2017-08-07 fdi:010012144 fre