Nuclear DNA content and karyotype of Rosewood (Aniba rosaeodora)

AUTOR(ES)

Contim, Luis Antônio Serrão, Carvalho, Carlos Roberto de, Martins, Franciele Alline, Freitas, Danival Vieira de

FONTE

Genetics and Molecular Biology

DATA DE PUBLICAÇÃO

2005-12

RESUMO

Rosewood (Aniba rosaeodora Ducke, Lauraceae) is ecologically and economically important to the Amazon region. As a consequence of its economic importance, rosewood populations have been decimated in the Amazon forest. Species of nine genera of the Lauraceae family have characterized karyotypes with n = x = 12 chromosomes in the gametophytic phase but the genus Aniba is one of the least studied Lauraceae genera with a previously undescribed genome. We used cytogenetic techniques to determine that the A. rosaeodora karyotype contained 12 pairs (2n = 24) of relatively small submetacentric chromosomes with lengths ranging from 1.34 to 2.25 mum and a nucleolar organizer region (NOR) in the short arm of chromosome 7. Flow cytometry gave 2C = 2.32 pg of DNA, equivalent to approximately 2.24 x 10(9) base pairs.

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