Chromosome Number for Bromeliaceae Species Occurring in Brazil

Abstract

The chromosome number of 25 Bromeliaceae species from the genera Dyckia, Vriesea, Aechmea, Ananas, Billbergia, Nidularium, Neoregelia, Neoglaziovia, Orthophytum, Portea, Quesnelia and Wittrockia were assessed. All are diploid 2n=50, except for Orthophytum albopictum and Neoglaziovia variegata, both tetraploids, 2n=100. The chromosome counts are the first report for 19 of the 25 species evaluated. All chromosome counts reinforce x=25 as the basic number for the family.