| Journal: | Anais da Academia Brasileira de Ciencias |
| Database: | PERIÓDICA |
| System number: | 000417609 |
| ISSN: | 0001-3765 |
| Authors: | Cordeiro, Joel M.P1 Kehler, Miriam2 Souza, Gustavo3 Felix, Leonardo P1 |
| Institutions: | 1Universidade Federal da Paraiba, Centro de Ciencias Agrarias, Areia, Paraiba. Brasil 2Sociedade Fritz Muller de Ciencias Naturais, Curitiba, Parana. Brasil 3Universidade Federal de Pernambuco, Centro de Ciencias Biologicas, Recife, Pernambuco. Brasil |
| Year: | 2017 |
| Season: | Dic |
| Volumen: | 89 |
| Number: | 4 |
| Pages: | 2697-2706 |
| Country: | Brasil |
| Language: | Inglés |
| Document type: | Artículo |
| Approach: | Experimental |
| English abstract | Chromosome numbers and heterochromatin banding pattern variability have been shown to be useful for taxonomic and evolutionary studies of different plant taxa. Bignonieae is the largest tribe of Bignoniaceae, composed mostly by woody climber species whose taxonomies are quite complicated. We reviewed and added new data concerning chromosome numbers in Bignonieae and performed the first analyses of heterochromatin banding patterns in that tribe based on the fluorochromes chromomycin A3 (CMA) and 4’-6-diamidino-2-phenylindole (DAPI). We confirmed the predominant diploid number 2n = 40, as well as variations reported in the literature (dysploidy in Mansoa [2n = 38] and polyploidy in Dolichandra ungis-cati [2n = 80] and Pyrostegia venusta [2n = 80]). We also found a new cytotype for the genus Anemopaegma (Anemopaegma citrinum, 2n = 60) and provide the first chromosome counts for five species (Adenocalymma divaricatum, Amphilophium scabriusculum, Fridericia limae, F. subverticillata, and Xylophragma myrianthum). Heterochromatin analyses revealed only GC-rich regions, with six different arrangements of those bands. The A-type (one large and distal telomeric band) were the most common, although the presence and combinations of the other types appear to be the most promising for taxonomic studies |
| Disciplines: | Biología |
| Keyword: | Angiospermas, Genética, Taxonomía y sistemática, Citogenética, Citotaxonomía, Ploidía, Bandeo cromosómico, Bignonieae, Bignoniaceae |
| Keyword: | Angiosperms, Genetics, Taxonomy and systematics, Cytogenetics, Cytotaxonomy, Ploidy, Chromosome banding, Bignonieae, Bignoniaceae |
| Full text: | Texto completo (Ver HTML) |
