Chromosome studies in American Panicoideae (Poaceae).

MORRONE, O.; ESCOBAR, A.; F.O. ZULOAGA

ANNALS OF THE MISSOURI BOTANICAL GARDEN

Missouri Botanical Garden

Lugar: St. Louis, Missouri, Estados Unidos; Año: 2006 vol. 93 p. 647 - 657

0026-6493

Chromosome numbers and observations on meiotic chromosome behavior of 37 taxa of American Panicoideae are given. The taxa studied are: Axonopus scoparius, Cenchrus myosuroides, Dichanthelium aciculare var. aciculare, D. acuminatum var. acuminatum, Echinochloa chacoensis, Eriochloa montevidensis, Isachne arundinacea, Panicum hirticaule, P. stoloniferum, P. trichanthum, Paspalum blodgettii, P. buchtienii, P. caespitosum, P. candidum, P. ceresia, P. clavuliferum, P. commune, P. denticulatum, P. ekmanianum, P. ellipticum, P. fimbriatum, P. glabrinode, P. glaucescens, P. hartwegianum, P. inconstans, P. indecorum, P. juergensii, P. pauciciliatum, P. penicillatum, P. plicatulum, P. postratum, P. saccharoides, P. squamulatum, P. variabile, P. wrightii, Urochloa fusca, and U. lorentziana. Nine counts are first reports for Echinochloa chacoensis (2n = ca. 72), Panicum stoloniferum (2n = 20), Paspalum buchtienii (2n = 20), Paspalum ceresia (2n = 40), Paspalum ekmanianum (2n = 20), Paspalum glabrinode (2n = 20), Paspalum inconstans (2n = ca. 60), Paspalum penicillatum (2n = 40), and P. variabile (2n = 40). Ten counts differed from previously published counts: Axonopus scoparius (2n = 60), Cenchrus myosuroides (2n = ca. 72), Isachne arundinacea (2n = 20), Paspalum denticulatum (2n = 20), P. ellipticum (2n = 40), P. fimbriatum (2n = ca. 40), P. hartwegianum (2n = 40), P. saccharoides (2n = 40), P. squamulatum (2n = 20), and Urochloa lorentziana (2n = 36). Key words: Poaceae, Panicoideae, America, chromosome numbers.