Horizon 1 1 17 ACLN : Articles dans des revues avec comité de lecture non répertoriées par l'AERES Euphytica 1-20 RESSOURCES VEGETALES SPONTANEES POLYPLOIDE APOMIXIE REPARTITION GEOGRAPHIQUE SYNTHESE 1997 fdi:010012150 ENG Euphytica 0014-2336 10.1023/A:1003077906928 https://www.documentation.ird.fr/hor/fdi:010012150 https://horizon.documentation.ird.fr/exl-doc/pleins_textes/pleins_textes_6/b_fdi_47-48/010012150.pdf 97 Horizon (IRD) Section #Brevivalvula$ is one of five sections in the large tropical grass genus #Pennisetum$. It belongs to the tertiary genepool of #P. glaucum$ (L.) R. Br., pearl millet, and consists of six morphological taxa : #P. atrichum$ Stapf and Hubb., #P. hordeoides$ (Lam.) Steud., #P. pedicellatum$ Trin., #P. polystachion$ (L.) Schult., #P. setosum$ (Swartz) L. Rich. and #P. subangustum$ (Schum.) Stapf and Hubb., which together form a polyploid and agamic complex. Four euploid (x = 9) and twelve aneuploid chromosome levels have been found till now ; the polyploids are apomictic, while diploid populations of #P. polystachion$ and #P. subangustum$ are considered sexual. (Résumé d'auteur) 076AMEPLA06