EVALUATION OF SOME CORN HYBRIDS BASED ON THE GRAINS OIL CONTENT

The study analyzed the oil content of a collection of 20 corn hybrids. The corn hybrids were cultivated within ARDS Lovrin, under non-irrigated cultivation conditions. The biological material was represented by 20 hybrids created within ARDS Suceava. Maize hybrids, considered in the experiment SV1 to SV20, were grown in the comparative culture, in repetitions. Grain production was harvested according to variants and repetitions at the harvest maturity of the plants. Samples were taken from the grain production to determine the oil content (Oil, %). The oil content in the corn grains varied between Oil = 5.15±0.06% in the SV6 hybrid, and Oil = 6.05±0.06% in the SV9 and SV17 hybrids. Based on 190 comparative analyses, 98 comparative analyzes presented statistical certainty. 43 cases with negative differences and 55 cases with positive differences were registered. In the case of positive differences, 37 cases were registered at the safety level p<0.001 (***), six cases at the safety level p<0.01 (**) and respectively 12 cases at the safety level p<0.05 (*) ). In the case of negative differences, 26 cases were registered at the safety level p<0.001 (ooo), nine cases at the safety level p<0.01 (oo), and respectively eight cases at the safety level p<0.05 (o). The mean value of the oil content, at the experiment level, was Oil_m = 5.65±0.06%. Compared to the mean value, 11 hybrids showed higher values, and 8 hybrids showed lower values. Positive growth of the quality index (Oil) was between DOil = 0.050% (SV1, SV15, SV18), and DOil = 0.400% (SV9, SVSV17). The negative growth in quality indice was between DOil = -0.500% (SV6) and DOil = -0.050 (SV4). Cluster analysis facilitated the grouping of corn hybrids based on similarity (Coph.corr = 0.802).