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March 6, 2026BMC AgricultureOpen Access

Genomic-assisted refinement of heterotic groups in short-duration maturing tropical yellow and orange maize inbred lines

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Authors

IAIdris Ishola AdejumobiInternational Institute of Tropical Agriculture WMWende MengeshaInternational Institute of Tropical Agriculture MGMelaku GedilInternational Institute of Tropical Agriculture

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Implication

Refines heterotic groups in maize inbred lines to enhance hybrid performance, suggesting improved breeding strategies.

Key Points

The aim is to refine heterotic groups in tropical yellow and orange maize inbred lines for better hybrid development.
Genotyping of 1,437 maize inbred lines using 3,305 DArTag SNP markers.
Evaluation of 280 hybrids from 214 inbred lines with four standard testers.
Yield performance trials conducted using a 14 × 20 alpha-lattice design over two years.
Diversity analysis and clustering through PCA, DAPC, and phylogenetic methods.
Average marker polymorphism observed was 0.328 with a minor allele frequency of 0.265.
Identification of three genetic clusters and two major clusters through various analyses.
Hybrids showed significantly higher grain yield from between-maturity heterotic subgroups than within-maturity subgroups.

Cite This Study

Adejumobi et al. (2026) studied this question.

synapsesocial.com/papers/69aa6f0d531e4c4a9ff593c4 https://doi.org/10.1186/s44399-026-00032-2

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