Fig. 4From: Grouping of genomic markers in populations with family structureCorrelation (a) and LD matrix (b) for maize data on chromosome 2. The red dots highlight representative SNPs of groups with at least three SNPs. In total, 956 SNPs were considered. The correlation matrix was set up at 953 SNPs and the population-LD matrix at 956 SNPs; missing values are filled in white colorBack to article page