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Type: Artigo de periódico
Title: Chromosome Studies In Gomidesia, Marlierea, Myrceugenia And Myrcia (myrtaceae, Subtribe Myrciinae)
Author: Da Costa I.R.
Forni-Martins E.R.
Abstract: In this paper we describe the chromosome numbers of several species of Myrtaceae (subtribe Myrciinae) from south-eastern Brazil, in order to help determine the circumscription and limits of this group. The chromosomal counts of 20 species were obtained, 17 of which are new. The number 2n = 22 occurs in almost all of species and genera analysed except for the polyploid species Gomidesia gaudichaudiana and two species of Myrcia, with 2n = 44. With these results, our knowledge of the chromosome number in the subtribe Myrciinae increased from 12 (2.2%) to 29 species (5.4%). The occurrence of 2n = 22 in species of the four genera analysed did not help resolve taxonomic questions relating to the distinction between Myrcia, Marlierea and Gomidesia. Although less frequent in Myrciinae, polyploidy appears to have had an important role in the evolution of this family, with high frequency in Eugeniinae (22.5% of Eugenia species) and Myrtinae (50% of the species, 75% in Psidium). © The Board of Trustees of the Royal Botanic Gardens, 2007.
Rights: fechado
Identifier DOI: 
Date Issue: 2007
Appears in Collections:Unicamp - Artigos e Outros Documentos

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