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Table 2 Level of ploidy, number of chromosomes and signals resulting from FISH with 18/25S rDNA and 5S rDNA probes in accessions of balm (Melissa officinalis)

From: Chromosome number and ploidy level of balm (Melissa officinalis)

Accession Number of chromosomes Signals of 18/25S rDNA Signals of 5S rDNA Ploidy
BLBP 48 32 2 2 diploid
MELI 1 32 2 2 diploid
BLBP 78 48 3 3 triploid
BLBP 113 48 3 3 triploid
MELI 14 64 4 4 tetraploid
MELI 22 64 4 4 tetraploid