Renno Jean-François, Schmelzer G., De Jong J.H. (1995). Variation and geographical distribution of ploidy levels in Pennisetum section Brevivalvula (Poaceae) in Burkina Faso, Benin and southern Niger. Plant Systematics and Evolution, 198, p. 89-100. ISSN 0378-2697.
Titre du document
Variation and geographical distribution of ploidy levels in Pennisetum section Brevivalvula (Poaceae) in Burkina Faso, Benin and southern Niger
Année de publication
1995
Type de document
Article
Auteurs
Renno Jean-François, Schmelzer G., De Jong J.H.
Source
Plant Systematics and Evolution, 1995,
198, p. 89-100 ISSN 0378-2697
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)
