Ph.D., C.N.R.S., researcher since 1977, director of research since 1992, at present director of research emeritus, University Paris-Saclay, Ecology, Systematics, Evolution U.M.R. 8079 U.P.S.-C.N.R.S.-AgroParisTech, Department “Diversity and Evolution of Plants”. Main research field: Chromosome evolution and genome organization, Evolution of plants, Biodiversity, Endemism, Plant Evolutional Systematic, Cytogenetics.