What question did this study set out to answer?

This research aims to identify maize hybrids that exhibit high yield and stability against fall armyworm infestation across different environments.

February 12, 2026Open Access

Agronomic Performance and Stability of Fall Armyworm ( Spodoptera frugiperda ) Tolerant Maize Single Cross Hybrids Across Environments in Uganda

Key Points

This research aims to identify maize hybrids that exhibit high yield and stability against fall armyworm infestation across different environments.
Assessment of 94 maize single-cross hybrids created by crossing inbred lines.
Evaluation conducted using a 9 × 11 alpha lattice design with two replications.
Statistical analyses performed to examine differences in grain yield and fall armyworm resistance.
Genotype-by-environment interactions significantly impacted grain yield and FAW resistance.
Entry 65 demonstrated the highest mean yield of 5.07 t/ha under FAW pressure.
Identified hybrids showed promising stability and high yield performance across environments.

Abstract

Fall armyworm (FAW) Spodoptera frugiperda is a new pest in sub‐Saharan Africa (SSA), first reported in 2016, and has fast become a pest of economic importance, causing losses of approximately 2.5–6.1 billion U.S. dollars in the region. Developing FAW‐resistant varieties presents an economically sustainable solution to mitigate this challenge. The objective of this study was to identify maize single‐cross hybrids (SCH) with high yield and stability under natural FAW infestation. This study assessed 94 SCH created by crossing three FAW‐tolerant inbred lines with storage weevil‐resistant and elite inbred lines. The 94 SCH with 5 yield checks were evaluated using a 9 × 11 alpha lattice design, with two replications across three environments. Analysis of variance revealed highly significant differences among genotypes for grain yield (GY) and FAW resistance across environments. Genotype‐by‐environment interactions (GEI) and stability analyses were conducted using additive main effects and multiplicative interactions (AMMI) and genotype + genotype‐by‐environment interaction effect (GGE) models to select promising genotypes. Results showed significant differences for genotype, environment, and genotype‐by‐environment interaction. GEI contributed a great percentage (24.2%) of the total variation observed for FAW resistance; for GY, environmental effect contributed more (39.26%) to GY than GEI (16.23%). Stability analysis using GGE identified Entry 65 (CKDHL166087/CZL15088) as the preferred genotype with a mean yield of 5.07 t/ha under FAW pressure. Across environments, entries 100 (CML566/CML543), 65 (CKDHL166087/CZL15142), 81(CKDHL120348/CKLTI0043), 66 (CKDHL166087/CZL15123), and 23 (CKSBL10008/CKDHL1800803) were stable and had high mean yield performance under natural FAW infestation. The study demonstrates the potential of using existing genetic material to develop high‐yielding varieties under high FAW pressure. Further evaluation of promising SCH under artificial and diverse growing conditions is needed. These hybrids could be used to generate a tolerant three‐way cross with other inbred lines.

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Cite This Study

Aduto et al. (Thu,) studied this question.

synapsesocial.com/papers/698d6e4a5be6419ac0d53efb https://doi.org/https://doi.org/10.1155/ioa/4373384

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