Evaluation of Promising Hybrid Field Maize Varieties under Paddy Field Condition in Ubon Ratchathani and Si Sa Ket Provinces

Abstract

The objective of this experiment was to evaluate the elite line hybrid maize varieties under high-yielding paddy field conditions suitable for the planting season. The study was conducted in Ubon Ratchathani and Si Sa Ket provinces. The experimental design used was a Randomized Complete Block Design (RCBD) with four replications, including six hybrid maize varieties: NSX152067, NSX152097, NSX202002, NSX172017, Pac789, and DOA Nakhon Sawan 5. Combined analysis of variance for the six hybrid maize varieties across the four environments found that no statistically significant differences among varieties and environment and no interaction between varieties and environment. The variability of yield is a result of the influence of varieties (genotype). The comparing the mean yields across the four environments, Pac789 showed the highest yield, showing a statistically significant difference compared to the other five varieties/lines. However, there were no significant differences among the varieties/lines. Pac789 consistently produced high yields across all environments, while DOA Nakhon Sawan 5 and the elite line NSX152067 showed a trend to high yield performance. Therefore, these three varieties are recommended for dry season varieties in paddy fields in Ubon Ratchathani and Si Sa Ket provinces.