Números cromosómicos de especies de Mimosa (Leguminosae) de Paraguay

Abstract

<div><div>En el presente estudio el número de cromosomas de la subsp Mimosa xanthocentra. subsericea var. subsericea, M. balansae, M. chacoensis, M. rojasii todos con 2n = 26 y M. lupinoides con 2n = 52 ha sido reportado en primer término. El 2n = 52 de M. somnians subsp. viscida var. viscida y de M. somnians subsp. somnians var. somnians son nuevas y diferentes de las 2n = 26 publicados antes para M. somnians var. somnians de Argentina. M. debilis con 2n = 26 también difiere de las cifras reportadas previamente para M. debilis var. debilis de Argentina con 2n = 52. El 2n = 26 de adenocarpa M. bimucronata var. coincide con la cifra reportada para M. bimucronata var. bimucronata, y el número de M. polycarpa var. spegazzinii con 2n = 26 se confirma</div></div>

Chromosome Studies in Argentinian Species of Mimosa (Leguminosae).

“…The chromosome numbers of M uraguensis and M polycarpa, both with 2n=26, agree with the numbers found for other populations of these species from Misiones Province (Seijo 1993). Also, the chromosome number of M. bimucronata var.…”

“…This is the second studied species of the genus with such a ploidy level, along with M dolens Vell. (Seijo 1993). The presence of polysomatic cells in root tips of Mimosa species was first reported for M pudica (Witkus and Berger 1947) and later for M bimucronata (Covas and Schnack 1947) and other Mimosa species (Seijo 1993).…”

“…(Seijo 1993). The presence of polysomatic cells in root tips of Mimosa species was first reported for M pudica (Witkus and Berger 1947) and later for M bimucronata (Covas and Schnack 1947) and other Mimosa species (Seijo 1993). The occurrence of these cells has been related to the differentiation in root tissues, specially metaxylem cells (Barlow 1985), and also with the root nodule formation in some legume species (Kodama 1970).…”

Toward a Phylogeny of Mimosa (Leguminosae: Mimosoidae): A Preliminary Analysis of Southern South American Species Based on Chloroplast DNA Sequence1

“…Moreover, different ploidy levels were described in Mimosa in ca. 30 species (Withus & Berger, 1947;Goldblatt, 1981;Seijo, 1993Seijo, , 1999Seijo, , 2000Morales et al, 2007). Morphological, cytogenetic, and molecular criteria indicated that hybridization and polypoloidy processes have been impor- Table 4.…”

Patterns of chromosomal variation in Mexican species of Aeschynomene (Fabaceae, Papilionoideae) and their evolutionary and taxonomic implications

“…The cytogenetics studies of the genus showed that there is agreement on the basic number x = 10 (Bir and Kumari 1977, Coleman and Demenezes 1980, Bairiganjan and Patnaik 1989 and 2n = 20 for most species (Renard et al 1983, Vanni 1983, Kumari and Bir 1990, Seijo and Vanni 1999. Arrighi et al (2014) used molecular, cytogenetic methods and measure of nuclear DNA content, to analyze the role of polyploidy in Aeschynomene New World species of the Nod-independent clade from North America.…”