AMELIORATION DES PLANTES FITOMEJORAMIENTO 52 PLANT BREEDING 52 RENDEMENT RENDIMIENTO 52 YIELDS 52 ARROZ 51 RICE 51 RIZ 51 VARIEDADES 32 VARIETE 32 VARIETIES 32 PLANT PRODUCTION 13 PRODUCCION VEGETAL 13 PRODUCTION VEGETALE 13 RESISTANCE AUX FACTEURS NUISIBLES 12 RESISTANCE TO INJURIOUS FACTORS 12 RESISTENCIA A AGENTES DANINOS 12 HIBRIDACION 11 HYBRIDATION 11 HYBRIDIZATION 11 FAO IAEA 10 INDUCED MUTATION 9 MUTACION INDUCIDA 9 MUTATION PROVOQUEE 9 BREEDING METHODS 8 CULTURAL METHODS 8 IRRADIACION 8 IRRADIATION 8 METHODE D'AMELIORATION GENETIQUE 7