[The genetic improvement of cauliflower [Brassica oleracea L. var. botrytis L.]]

aploidia autoesterilidad backcrossing brassica oleracea botrytis calidad crop yield ecotipi ecotipos ecotypes esterilidad masculina f1 hybrids fitomejoramiento genetic stability germoplasma germplasm haploidia haploidie haploidy hybride f1 hybride somatique ibridi f1 ibridi somatici in vitro regeneration linee pure male infertility miglioramento genetico vegetale piante transgeniche plant breeding protoplaste protoplasti protoplastos protoplasts pure lines quality rendement des cultures rendimiento de cultivos retrocruzamiento rigenerazione in vitro somatic hybrids transgenic plants