Chromosome Numbers of Chilean Pteridophytes: First Contribution

Abstract

Mitotic chromosome counts in Chilean pteridophytes confirm the diploidy described for Equisetum L. (2n = 216) and Blechnum L. (2n = 66), as well as the tetraploidy of Asplenium L. (2n = 144). Megalastrum spectabile (Kaulf.) A.R.Sm. et R.C.Moran is diploid (2n = 82), while in metaphases of Polystichum subintegerrimum (Hook. et Arn.) R.A.Rodr. chromosome numbers from ca. 311 to 328 were counted. Tetraploidy was also described in Adiantum chilense Kaulf. (2n = 116).

Spore morphology and ornamentation in the genusBlechnum(Blechnaceae)

“…The known Blechnum diploids fall in the range of 30-40 μm in spore length, and the tetraploids in the range of 40-60 μm (Mehra & Bir, 1958;Walker, 1966Walker, , 1973Walker, , 1985Smith & Mickel, 1977;de la Sota & Cassá de Pazos, 1983;Manickam & Irudayaraj, 1988;Kawakami et al, 1997;Jara-Seguel et al, 2006;González et al, 2010). A higher level of ploidy is only known for B. lherminieri, reported as a dodecaploid by Smith and Mickel (1977), with spore length above 60 μm.…”

Revisión de especies monomórficas y subdimórficas del género "Blechnum" ("Blechnaceae-Polypodiophyta")

“…Indusios con ondulaciones triangulares irregulares y laceraciones profundas. Diploide, 2n = 62; n = 31 (De la Sota & Cassá de Pazos 1983) y 2n = 66 (Jara- Seguel et al 2006;González et al 2010).…”

“…Los recuentos cromosomáticos para B. australe subsp. hastatum discrepan y se conocen dos números diploides 2n = 62 (De la Sota & Cassá de Pazos, 1983) y 2n = 66 (Jara- Seguel et al 2006, González et al 2010; el recuento conocido para B. australe subsp. auriculatum corresponde a un tetraploide, de 2n = 124 (De la Sota & Cassá de Pazos 1983).…”

Molecular phylogeny of the fern family Blechnaceae (Polypodiales) with a revised genus‐level treatment

“…Gasper & Salino, with 2n = 56, presumably based on x = 28 (Tindale and Roy, 2002); the neotropical Parablechnum chilense (Kaulf.) Gasper & Salino was reported as n = 33 (Jara-Seguel et al, 2006).…”