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Fluorescence intensity histograms of leaf tissue nuclei from diploid and tetraploid Sorghum bicolor. A) This histogram is from diploid subsp. verticilliflorum, accession IS11010, genotype 7.5d. B) This histogram is from a naturally occurring tetraploid plant from a typically diploid subsp. verticilliflorum accession, IS12702, genotype 76d.
