Chromosome data in Paspalum species

REUTEMANN ANNA VERENA; HOJSGAARD, DIEGO HERNÁN; MARTÍNEZ, ERIC JAVIER; RUA, GABRIEL HUGO; DAVIÑA, JULIO RUBÉN; HONFI, ANA ISABEL

TAXON

INT ASSOC PLANT TAXONOMY

Año: 2020 vol. 69 p. 41 - 43

0040-0262

Polyploidy has a major role in the evolution of grasses, especially in the Paspaleae tribe, whose genera often include species having multiple cytotypes. These newchromosome counts are especially important regarding the diploid materials. Diploid cytotypes in species of Paspalum reproduce sexually, while polyploids are usually apomictic (clonal). For this reason, the finding of new diploid materials contributes to the geographic location of natural sexual populations and areas of variability, to acquire newgenotypes and incorporate them in current breeding programs aimed at improving regional forage cultivars and enriching ex situ germplasms for conservation.Paspalum aff. arundinellum Mez, 2n = 50; Paspalum falcatum Nees ex Steud., n = 10; Paspalum glaucescens Hack., 2n = 40; Paspalum indecorum Mez, n = 10, Paspalum jurgensii Hack., 2n = 20; Paspalum limbatum Henrard, n = 10; Paspalum maculosum Trin., 2n = 20; Paspalum orbiculatum Poir., n = 10, Paspalum polyphyllum Nees ex Trin., n = 20; Paspalum quarinii Morrone & Zuloaga, 2n = 20; Paspalum repens P.J.Bergius, n = 10; Paspalum umbrosum Trin., n = 10.