Jean R. — Journće commćmorative du centcnairc de la mort de Gregor
Mendel (1884-1984).................................................... 1 - 2
Cortois J. — Discours d'accueil .......................................... 3 - 4
Guignard P. — Apport de Mendel a la gćnetique de son epoąue (Contr i-
bntion of Mendel to genetics oj his epoch) .......................... 5-10
Desprez M. — Histoire de la genetiąue mendelienne vue a travers les progres de la sćlcction de la bctterave (Mendelian genetics through sugar beet breeding).................................................. 11 - 18
Mounolou J.-Cl. — L'avćnement de la genetiąue cytoplasmiąue : rceuvre de Boris Ephrussi (The discovery of cytoplasmic inheritance: Boris Ephrussi's work) .................................................... 19 - 23
Jean R. — Decoiwcrtc par rinternmSdiaire des loci mutables des ćlćmcnts gónćtiąues de contróle transposables chcz le mais : r<cuvrc de Barbara McCuntock, prix Nobel de mćdecine et de biologie 1983 (Discovery of the transposable genetic controlling elements by means of the mutahlc loci on the maizc: the work of Barbara McCuntock, Nobel pricc of
medecine aitd biology 1983) ....... ................................. 25 - 40
Pernes J. — Donnees nouvelles de Thistoire des plantes cultivees (New data
in the history of the cultivated plants)................................ 41 - 45
Guillaume J. — De la genetiąue au genie genetiąue chez les bacteries (From
bacterial genetics to genetic engineering).............................. 47-53
Debeyre G. — Discours de clóture ........................................ 55 - 56