Nuclear genome size variation in fleshy-fruited Neotropical Myrtaceae

Autor(es)

da Costa, Itayguara Ribeiro ^[1] ; Dornelas, Marcelo Carnier ^[2] ; Forni-Martins, Eliana Regina ^[1]

Afiliação do(s) autor(es)

^[1] Univ Estadual Campinas, Inst Biol, Dept Bot, BR-13083970 Campinas, SP - Brazil

^[2] Univ Estadual Campinas, Inst Biol, Dept Plant Physiol, BR-13083970 Campinas, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: PLANT SYSTEMATICS AND EVOLUTION; v. 276, n. 3-4, p. 209-217, DEC 2008.
• Citações Web of Science: 8

Resumo

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. (AU)

• Processo FAPESP: 04/13041-8 - Estudos citotaxonomicos em especies da subtribo myrtiinae o. berg (myrtaceae juss.), com enfase no genero "psidium" l.
• Beneficiário: Eliana Regina Forni Martins
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 01/13169-6 - Estudos cromossômicos em Myrtaceae de cerrado do estado de São Paulo
• Beneficiário: Itayguara Ribeiro da Costa
• Modalidade de apoio: Bolsas no Brasil - Mestrado