For instance, the QTL for DFI on SSC 1 was homologous with HSA 6q23–24 region (Figure 4a and b) which has been found to significantly affect obesity-related traits in humans such as waist circumference, body mass index or fasting glucose and insulin levels in different studies (reviewed in [63]). The gene discussed is INS; the disease is obesity due to melanocortin 4 receptor deficiency.