Germplasm collection, hybridization and selection of improved cassava varieties [study conducted in the Philippines]

asia asie breeding breeding methods crops cultivos dicotiledoneas dicotyledons economic plants euphorbiaceae filipinas geraniales germoplasma germplasm hortalizas (plantas) hybridation hybridizing manihot manihot esculenta methode methods philippines plantas plantas feculentas plante plante de culture plante racine plants plasma germinatif root crops root vegetables selection starch crops vegetable crops