Evaluation of sunflower test crosses and hybrids in Central Italy [Helianthus annuus L.; Marches (Italy)]

agronomic characters air temperature altezza altura caratteri agronomici conduite de la culture contenuto lipidico crop management crop yield cytoplasmic male sterility ensayos de variedades f2 hybrids fenologia field experimentation genotipi genotipos genotypes gestione delle colture grain granella granos hauteur height helianthus annuus hybridation hybride f2 hybridization ibridazione ibridi f2 lipid content manejo del cultivo marcas (italia) marche marches (italie) marches (italy) phenology precipitation prove varietali rendement rendement des cultures rendimiento rendimiento de cultivos rese sperimentazione in campo sterilità citoplasmatica maschile temperatura del aire temperatura dell'aria teneur en lipides variety trials yields