Simultaneous selection of several tropical maize hybrids under acidic soil conditions

Abstract

Abstract Acidic soils present a major abiotic challenge for various crops, including maize. Such an environment may cause nutrient unavailability, leading to poor growth and yield. Selection using multiple traits enables breeders to select maize hybrids that appeal to preference. This research aimed to obtain information on the genetic variability and predict the selection response of tropical maize hybrids based on multiple traits. Fifty-two maize hybrids, including six checks, were evaluated under acidic soils using an augmented RCBD with three blocks for the check varieties. The results showed that the genotypes significantly affected several agronomic traits and yield. Moderate to high e heritability was found for most traits. The greatest positive direct effect on yield was demonstrated by ear diameter, stay-green, and shelling percentage. G13, G14, G49, G50, G35, G39, G09, and G51 were selected maize hybrids using the MGIDI method. Selection using multiple traits is expected to have selection precision while considering its strengths and weaknesses. The selected genotypes may be subjected to a multi-environment trial to understand the influence of genotype by environment interaction.