Evaluation of Stability of FAO 600 Corn Hybrids by Grain Yield and its Components

To study 38 corn hybrids, an experiment based on randomized complete blocks design with three replications at the Moghan and Karj was carried out during the 2020 cropping season. The results showed that there was a significant difference between corn hybrids for grain yield, grains per ear, ear length, rows per ear, 1000-grain weight, ear diameter, and grain depth. Hybrid No. 26 (KLM81027 × K47/3) with the highest yield and ear length was identified as the best hybrid. The correlation between grain yield with grain depth and 1000-grain weight was significant. The heritability value was between 19.01% (grain yield) and 87.59% (row per ear). The regression analysis indicated that rows per ear and ear diameter had positively related to grain yield. Cluster analysis with grain yield, grains per ear, ear length, rows per ear, 1000-grain weight, ear diameter, and grain depth of 38 corn hybrids classified into four different groups, one of which has a hybrid of No. 26 (KLM81027 × K47/3), and No. 37 (TWC647) was the most desirable groups. In addition, hybrids No. 4, 9, 13, 15, 19, 20, 23, 25, 32, 37, and 38 were identified as superior and stable hybrids for cropping in warm dry climates. As a result, it seems that corn hybrids of FAO 600 can be suitable for cropping in warm dry climates, alsothe K74/2-2-1-4-1-1-1 × K3640/3 hybrid was identified as superior and stable.