IAPT chromosome data 28

Abstract

AMARYLLIDACEAE Habranthus barrosianus Hunz. & Di Fulvio, 2n = 2x = 18; Argentina, Buenos Aires, L 3772 (B). Habranthus brachyandrus (Baker) Sealy, n = 12II, 2n = 4x = 24; Argentina, Corrientes, D 416 (B, MNES). Habranthus chacoensis Ravenna, n = 6II, 2n = 2x = 12; Argentina, Chaco, D 342 (B, CTES, MNES). Habranthus coeruleus (Griseb.) Traub, 2n = 2x = 30; Argentina, Misiones, H 985 (MNES). Habranthus gracilifolius Herb., 2n = 4x = 24; Argentina, Buenos Aires, L 3774 (B). Habranthus pedunculosus Herb., 2n = 2x = 14; Argentina, Chaco, D 334 (B, MNES). Habranthus tubisphathus (L'Hér.) Traub, 2n = 4x = 24; Argentina, Corrientes, D 329 (B, CTES, MNES). 2n = 6x = 36; Argentina, Buenos Aires, L 3771 (B).

IAPT chromosome data 33

“…The most frequent chromosome number in the genus as well as in the tribe is 2n = 22 (Table 2). Chromosome number and size, symmetry and CMA/DAPI, and location and number of ribosomal bands in Rhipsalideae show weak differentiation among species (Moreno & al., 2015;Las Peñas, 2018).…”

“…Our results confirm previous counts of 2n = 40 chromosomes for P. atratum (Freitas & al., 1997;Quarín & al., 1997;Takayama & al., 1998;Adamowski & al., 2005), 2n = 32 for P. convexum accessions, a number considered an exception in the genus Selva, 1976;Pozzobon & Valls, 1987;Sousa & al., 2018) and 2n = 40 for P. cordaense (Sousa & al., 2018).…”

“…Recently, Sousa & al. (2018) reported counts of 2n = 20 and 40 chromosomes for 11 acessions of P. foveolatum (under the name P. melanospermum Desv.…”

Molecular cytogenetics reveals an uncommon structural and numerical chromosomal heteromorphism in Zephyranthes brachyandra (Amaryllidaceae)

“…Zephyranthes brachyandra (Baker) Backer (Amaryllidaceae) is an ornamental bulbous plant native of the Neotropics, from southern South America to Mexico and southwest USA, including southern Brazil and West Indies, sometimes referred to as Habranthus brachyandrus (Baker) Sealy (Daviña, 2001;Daviña & Honfi, 2018;García et al 2019). Phylogenetically, the former genera Zephyranthes and Habranthus are now recognized as subgenera of Zephyranthes s.l.…”

“…(García et al 2019). The two subgenera share similar chromosome size and morphology, large variation in chromosome numbers, mainly with x = 6, several ploidy levels, and some species with B chromosomes (Naranjo, 1974;Felix et al, 2008Felix et al, , 2011aDaviña, 2001;Daviña & Honfi, 2018).…”