Fig. 2From: Scoring the number of B chromosomes in Zea mays L. using droplet digital PCR assayVerification of the number of B chromosomes in the material used for ddPCR optimization. The set of plants of reference line B73 with the respective B chromosome numbers from 1 to 10B (a–j). B chromosomes are marked with B-specific repeat ZmBs (red; indicated by arrowheads). Chromosomes are counterstained with DAPI (blue)Back to article page