1. National Institute of Agronomic Research of Tunis, Laboratory of Animal and Forage Production, INRAT, Tunis, Tunisia
2. Institut Supérieur des Etudes Préparatoires en biologie et géologie, ISEPBG, Tunis, Tunisia
3. Laboratory of Molecular Genetics, Immunolgy and Biotechnology Faculty of Sciences, University of Tunis El Manar, Tunis, Tunisia