1. High School of Agricultural Sciences, University of Antananarivo, 101 Antananarivo, Madagascar
2. North Florida Research and Education Center, University of Florida, Marianna, FL
3. UMR SELMET, CIRAD, Antsirabe, Madagascar
4. UMR SELMET, University of Montpellier, CIRAD, INRA, Montpellier SupAgro, Montpellier, France