1. Department of Plant Systems Biology, Flanders Institute for Biotechnology, 9052 Ghent, Belgium (A.I.F., M.K., P.H.); Department of Plant Biotechnology and Genetics, Ghent University, 9052 Ghent, Belgium (A.I.F., M.K., P.H.); Institut National de la Recherche Agronomique, Unité Mixte de Recherche 619, Centre Bordeaux-Aquitaine, 33883 Villenave d'Ornon, France (N.V., M.A., A.S., M.L.-C., C.R.); Pl