AMELIORATION DES PLANTES FITOMEJORAMIENTO 399 PLANT BREEDING 398 ARROZ 379 RIZ 379 RICE 378 VARIEDADES 105 VARIETE 105 VARIETIES 105 PLANT PRODUCTION 103 PRODUCCION VEGETAL 103 PRODUCTION VEGETALE 103 ORYZA 71 INVESTIGACION 63 RECHERCHE 63 RESEARCH 63 RESISTANCE AUX FACTEURS NUISIBLES 55 RESISTANCE TO INJURIOUS FACTORS 55 RESISTENCIA A AGENTES DANINOS 55 RENDEMENT 52 RENDIMIENTO 52 YIELDS 52 BREEDING METHODS 49 METHODE D'AMELIORATION GENETIQUE 48 METODOS DE MEJORAMIENTO GENETICO 48 HIBRIDACION 47 HYBRIDATION 47 HYBRIDIZATION 47 FAO IAEA 44 HIBRIDOS 42