Fig. 2From: Copy number variation of Ppd-B1 is the major determinant of heading time in durum wheatCopy number variation at Ppd-B1 and its effect on heading time. a Ppd-B1 copy number variation. The red horizontal lines indicate arbitrarily defined copy number classes based on the distribution of the Ppd-B1 / TaCO2 (internal positive control) ratio. b Ppd-B1 copy number for the alleles at the marker explaining the highest proportion of genotypic varianceBack to article page