Karyotype analysis in South American species of Myrtaceae

Autor(es)

Costa, Itayguara Ribeiro da ; Forni-Martins, Eliana R.

• Tipo de documento: Artigo Científico
• Fonte: Botanical Journal of the Linnean Society; v. 155, n. 4, p. 571-580, Dec. 2007.
• Área do conhecimento: Ciências Biológicas - Ecologia
• Assunto(s): Plantas Myrtaceae Cromossomos vegetais Poliploidia

Resumo

In Myrtaceae (Myrteae), the diploid chromosome number 2n = 2x = 22 is the most common, although variations of ploidy level occur, with some triploid (2n = 3x = 33) and tetraploid (2n = 4x = 44) records. Karyotype details in this group are scarce because the chromosomes are small (< 2 um). In this work, we carried out a karyotypic analysis of 15 species of Myrtaceae grouped in different subtribes and genera. Measurements of chromosome length (long arm, L; short arm, S) were taken and several karyotypic parameters were calculated for each species. The karyotypes in fleshy-fruited taxa (Myrteae) were more varied than in the other previously analysed dry-fruited group (Eucalyptus, Eucalypteae), in which the chromosomes were exclusively metacentric. (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