Cytogenetic analysis of seven species of Eucalyptus L'Hér. (Myrtaceae)
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Data
2000-07-01
Autores
Matsumoto, Silvia Tamie
Marin-Morales, Maria A. [UNESP]
De Fátima Ruas, Claudete
Ruas, Paulo Maurício
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Resumo
Seven species of the genus Eucalyptus were studied cytogenetically (E. deanei, E. dunni, E. grandis, E. maculata E. propinqua, E. saligna and E. tereticornis). The species showed a symmetrical karyotype with 2n=22 chromosomes, with chromosome length ranging from 0.58 μm to 1.39 μm. Karyotypic analysis indicated homogeneity of morphology and of chromosome number for most of the species of this genus studied here, although casual disploid species with 2n=24 have been found in previous studies. According to these data, a basic number of x=11 was established for this genus. The evolutionary tendency probably occurred by structural alterations (deletions, duplications, additions and translocations) and in some cases by aneuploid chromosome alterations.
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Chromosome, Eucalyptus, Karyotype, Plants cytogenetics
Como citar
Caryologia, v. 53, n. 3-4, p. 205-212, 2000.