The figure represents the fertility distribution of bulls used for SNP genotyping (mean ± SD). The scaling of fertility was defined as the deviation from the population average. The low-fertility bulls were scored below (negative data) the average conception rate while the high-fertility bulls scored above (positive data). The average difference between the two groups was 15.4%.
Feugang et al. BMC Genomics 2009 10:176 doi:10.1186/1471-2164-10-176