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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Karyotype analysis in South American species of Myrtaceae

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Author(s):
Costa, Itayguara Ribeiro da ; Forni-Martins, Eliana R.
Total Authors: 2
Document type: Journal article
Source: Botanical Journal of the Linnean Society; v. 155, n. 4, p. 571-580, Dec. 2007.
Field of knowledge: Biological Sciences - Ecology
Abstract

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)