Abstract Background Previously. in boars with extreme androstenone levels. differential expression of the CYP11A1 gene in the testes has been characterised. CYP11A1 is located in a region where a QTL influencing boar fat androstenone levels has been detected in a Large White pig population. https://www.nacrack.com/deal-alert-Dea-Eyewear-Jemma-deal-zone/