Abstract
<title>Abstract</title> <p>Hybrid maize (Zea mays L.) production in Indonesia is constrained by the variability of agroecological conditions across regions. The genotype × environment (G×E) interaction causes differences in agronomic performance of genotypes across diverse land typologies, making it essential to identify stable and adaptive genotypes. This study aimed to analyse the agronomic performance and G×E interaction of hybrid maize genotypes across two contrasting land typologies in South Sulawesi including Polombangkeng in Takalar District which represents a fertile mid-altitude agroclimatic zone and Moncongloe in Maros District which represents a dry acidic dryland. A Randomised Complete Block Design (RCBD) was used with 10 treatments consisting of seven candidate hybrid varieties from JH MAS 01 to JH MAS 07 and three check varieties ADV777, NK306, and NK212, each replicated three times. Agronomic parameters evaluated included plant height, leaf length, leaf width, leaf angle, stem diameter, ear height, and number of ear rows. Analysis of variance (ANOVA) results showed that the environmental factor or replication had a significant effect on plant height (p = 0.001), stem diameter (p = 0.000), and ear height (p = 0.007), whereas the genotype factor did not significantly affect any parameter tested. These findings indicate that environmental conditions are the dominant determinant of agronomic character expression in hybrid maize. Among the evaluated genotypes, NK212 showed the highest plant height (214.73 cm) and NK306 exhibited the largest stem diameter (17.97 mm). The results provide a scientific basis for variety recommendations and zone-based cultivation strategies in South Sulawesi.</p>