Chromosome studies in Spiranthinae and Cranichidinae (Orchidaceae)

Author(s)

Guimaraes, Leonardo R. S. ; Mercado-Ruaro, Pedro ; Correa, Andrea M. ; Salazar, Gerardo A. ; de Barros, Fabio

• Document type: Journal article
• Source: Rev. bras. Bot.; v. 38, n. 2, p. 10-pg., 2015-06-01.

Abstract

The chromosome numbers of eighteen species of Spiranthinae from Brazil and Mexico and two of Cranichidinae from Ecuador were analysed. Sixteen chromosome records are presented for the first time: Aulosepalum riodelayense (2n = 64), A. tenuiflorum (2n = 60), Cyclopogon luteoalbus (2n = 36), Dichromanthus aurantiacus (2n = 40), Eltroplectris calcarata (2n = 42), Pelexia funckiana (2n = 46), Sarcoglottis assurgens (2n = 46), S. richardiana (2n = 50), S. rosulata (2n = 33), S. sceptrodes (2n = 46), S. schaffneri (2n = 46), S. scintillans (2n = 46), Stenorrhynchos albidomaculatum (2n = 46), S. cf. speciosum (2n = 46), Ponthieva andicola (2n = 26) and P. pilosissima (2n = +/- 42). For Mesadenella cuspidata, a chromosomal number variation (2n = 38/42) was found. In addition, ideograms of five Brazilian species are presented. Chromosome data support phylogenetic relationships suggested by previous cytological and molecular studies. (AU)

• FAPESP's process: 12/19778-9 - Phylogeny and citotaxonomy of the "clade Stenorrhynchos" (Spiranthinae, Cranichideae, Orchidoideae, Orchidaceae)
• Grantee: Leonardo Ramos Seixas Guimarães
• Support Opportunities: Scholarships abroad - Research Internship - Doctorate
• FAPESP's process: 10/16353-1 - Phylogeny and cytotaxonomy of the "clade Stenorrhynchos" (Spiranthinae, Cranichideae, Orchidoideae, Orchidaceae)
• Grantee: Leonardo Ramos Seixas Guimarães
• Support Opportunities: Scholarships in Brazil - Doctorate