1. I2M, University of Bordeaux, INRAE, Bordeaux, France
2. IATE, University of Montpellier, INRAE, Institut Agro, Montpellier, France
3. STLO, INRAE, Institut Agro, Rennes, France
4. Boccard, Research and Development, F-35360 Montauban-de-Bretagne, France