Chromosome Numbers and Ploidy Levels of Some Paniceae and Paspaleae Species (Poaceae, Panicoideae)

Ana Isabel Honfi; Osvaldo Morrone†; Fernando Omar Zuloaga

doi:10.3417/2021585

Ana Isabel Honfi Universidad Nacional de Misiones
Osvaldo Morrone† Instituto de Botánica Darwinion
Fernando Omar Zuloaga Instituto de Botánica Darwinion

DOI: https://doi.org/10.3417/2021585

Keywords: Diploids, endemism, grasses, Neotropics, polyploidy

Abstract

Chromosome numbers and ploidy levels of 24 accessions of 17 species of tribe Panicoideae from Argentina, Cuba, and Brazil are given. Most of the studied species are endemics. The studied taxa are: Axonopus aureus P. Beauv., Dichanthelium aequivaginatum (Swallen) Zuloaga, D. stipiflorum (Renvoize) Zuloaga, D. surrectum (Chase ex Zuloaga & Morrone) Zuloaga, Homolepis isocalycia (G. Mey.) Chase, Paspalum arenarium Schrad., P. blodgettii Chapm., P. capillifolium Nash, P. coryphaeum Trin., P. distortum Chase, P. durifolium Mez, P. lindenianum A. Rich., P. oligostachyum Salzm. ex Steud., P. pumilum Nees, P. scutatum Nees ex Trin., P. strigosum Döll ex Chase, and Plagiantha tenella Renvoize; of these, the chromosome numbers of D. aequivaginatum, D. stipiflorum, D. surrectum (n = 9), Homolepis isocalycia (n = 20), Paspalum capillifolium, P. distortum, P. lindenianum, P. oligostachyum, and P. strigosum (n = 10) are presented for the first time. A new diploid cytotype (n = 10) for Paspalum blodgettii was found.