Abstract
SUMMARYA morphological analysis of the nucleolar chromosomes in pachytene was carried out in ten species of the genus Coffea L. introduced in Brazil. This analysis showed that the nucleolar chromosomes of these species differs particularly in total length, arm ratio and chromomere pattern. Seven of the diploid species have one nucleolar chromosome attached to only one nucleolus, and two species have two chromosomes attached to only one nucleolus. The only polyploid species in the genus, C arabica L., also has two chromosomes attached to one nucleolus. Morphological features between these two chromosomes indicates a probable similarity between the genomes that constitute the C. arabica complement.
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