Maize hybrids for grain as a 2nd crop created at the research institute for cereals and technical plants fundulea romania
Sarca, T.; Cosmin, O.; Negut, C.; Bica, N.; Ulinici, V.; Muresan, E.
Analele Institutului de Cercetari Pentru Cereale si Plante Tehnice Fundulea 45: 75-84
Very early hybrids for grain (100-200 FAO group) were tested as a 2nd crop, under irrigation. The very early hybrids, created and registered in northern Romania, yielded only 4650-6940 kg/ha due to their low resistance to high temperatures, drought, and attack of Helminthosporium turcicum Pass. Among them, HD 96 hybrid was distinguished for average yields of 6600-6940 kg/ha for other valuable agronomic characteristics and it was recommended for irrigated 2nd crops in southern Romania. In 1966 at Fundulea a breeding program was initiated to obtain very early maize hybrids for grain in an irrigated 2nd crop and resistant to H. turcicum Pass. Until 1971, 63 inbred lines were created from which 82 single, double and 3-way crosses were obtained. They were studied during the period 1973-1975. The best hybrids obtained, HS 93 and HS 97, gave 7220-7430 kg grain/ha, overyielding the HD 99 control by 36-42% and the HD 96 hybrid by 5-11%.