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The study aims to investigate the genetic mechanisms controlling leaf length in maize and identify candidate genes associated with this trait.

August 6, 2026BMC Plant BiologyOpen Access

Genetic architecture of node-specific leaf length and candidate gene identification in maize revealed by a temperate–tropical multiparental population

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Randomized trial evaluates leaf length traits in maize, revealing genetic factors for improved yield.

The study aims to investigate the genetic mechanisms controlling leaf length in maize and identify candidate genes associated with this trait.
Evaluated upper, ear, and lower leaf lengths across two environments using a multiparent RIL population.
Integrated genome-wide association study (GWAS) and QTL mapping with high-density GBS markers.
Conducted haplotype and qRT-PCR analyses to explore gene expression related to leaf elongation.
Identified 133 significant SNPs through GWAS and detected 13 candidate regions via QTL localization.
The key candidate gene ZmHUA2 explained 12.10% of the phenotypic variation associated with leaf length.
Favorable haplotypes from tropical parents significantly increased leaf length in the analyzed populations.

Lyu et al. (2026) studied this question.

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