Palma-Silva et al. 2004 (Article) Vriesea, Aechmea

Chromosome numbers, meiotic behavior, and pollen viability of species of Vriesea and Aechmea genera (Bromeliaceae) native to Rio Grande do Sul, Brazil

Author(s):—C. Palma-Silva, D.G. dos Santos, E. Kaltchuk-Santos & M.H. Bodanese-Zanettini

Publication:—American Journal of Botany 91(6): 804-807. (2004) — DOI

Abstract:—Chromosome number, meiotic behavior, and pollen viability were analyzed in 15 species of two genera, Vriesea and Aechmea, native to Rio Grande do Sul, Brazil. This study is the first cytogenetic analysis of these taxa. The chromosome numbers are all n = 25, consistent with the proposed base number of x = 25 for Bromeliaceae. All examined taxa displayed regular bivalent pairing and chromosome segregation at meiosis. Observed meiotic abnormalities include univalents in metaphase I; missing or extra chromosomes and precocious division of centromeres in metaphase II; laggards in telophase I and anaphase II/telophase II. The high pollen viability (>88%) reflects a regular meiosis.

Keywords:—Aechmea, Bromeliaceae, chromosome numbers, meiotic behavior, pollen viability, Vriesea