Autor(es): Contim, Luis Antonio Serrao ; Carvalho, Carlos Roberto de ; Martins, Franciele Alline ; Freitas, Danival Vieira de
Data: 2020
Origem: Oasisbr
Assunto(s): Cell Nucleus Dna; Dna, Plant; Angiosperm; Base Pairing; Chromosome 7; Chromosome Analysis; Chromosome Arm; Chromosome Nor; Chromosome Size; Controlled Study; Dna Content; Flow Cytometry; Gametophyte; Karyotyping; Nonhuman; Plant Chromosome; Plant Genetics; Species Difference; Aniba; Lauraceae; Magnoliophyta
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 = × = 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 μm 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 × 109 base pairs. Copyright by the Brazilian Society of Genetics.
