Artículos de revistas
Nuclear genome size variation in fleshy-fruited Neotropical Myrtaceae
Registro en:
Plant Systematics And Evolution. Springer Wien, v. 276, n. 41732, n. 209, n. 217, 2008.
0378-2697
1615-6110
WOS:000261181800007
10.1007/s00606-008-0088-x
Autor
da Costa, IR
Dornelas, MC
Forni-Martins, ER
Institución
Resumen
Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) In Myrtaceae, reports regarding the nuclear DNA content are scarce. The aim of this study is to present genome size data for fleshy-fruited Myrteae, and to test their relation with chromosome number and ploidy, the available data for cytoevolutionary studies in Myrtaceae. Thirty species out of ten genera were investigated for chromosome number and genome size using flow cytometry. Twenty-eight species were diploid with 2n = 2x = 22 and two species were tetraploid with 2n = 4x = 44. All genome sizes measured are new. Among the diploid species, a gradual and small variation in 2C-values (0.486 pg in Gomidesia schaueriana to 0.636 pg in Eugenia multicostata) was observed, whereas the tetraploid genomes of Psidium acutangulum and P. cattleianum had about twice as much DNA (1.053 and 1.167 pg, respectively). The total interspecific variation of C-values was 2.45-fold. The fleshy-fruited Myrteae have smaller holoploid genomes than the capsular-fruited Eucalypteae and Melaleuceae. 276 41732 209 217 Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) MCD ERFM Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) FAPESP [01/13169-6, 04/13041-8] CNPq [471065/2004-8]