Development and Utilization of Maize Germplasm Resources

A special issue of Agronomy (ISSN 2073-4395). This special issue belongs to the section "Crop Breeding and Genetics".

Deadline for manuscript submissions: 31 October 2026 | Viewed by 450

Special Issue Editors


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Guest Editor
Maize Research Institute, Southwest University, Chongqing 400715, China
Interests: carbon–nitrogen–phosphorus nutrient synergy in maize; maize breeding

E-Mail Website
Guest Editor
Maize Research Institute, Southwest University, Chongqing 400715, China
Interests: plant architecture; stress tolerance; maize breeding
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Maize (Zea mays L.) is one of the world’s most important staple crops, yet its productivity is increasingly threatened by environmental stresses and limited nutrient availability. To confront the challenges of climate change and advance toward agricultural production that is sustainable, it is essential to deepen our understanding of the genetic and molecular mechanisms underlying stress resilience and nutrient-use efficiency in maize.

This Special Issue aims to gather high-quality research focused on the genetic basis of maize adaptation to abiotic stresses—specifically high temperature, drought, and salinity—as well as the efficiency of nitrogen (N), phosphorus (P), and potassium (K) uptake and utilization. We invite contributions that employ advanced genomic, transcriptomic, proteomic, and phenomic approaches to identify key genes, quantitative trait loci (QTLs), and superior allelic variants associated with these traits. Studies that bridge basic discovery with pre-breeding applications, including molecular design breeding and allele mining for crop improvement, are particularly encouraged.

Dr. Chaofeng Li
Dr. Xiupeng Mei
Guest Editors

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Keywords

  • plant architecture
  • stress tolerance
  • nutrient use efficiency
  • lodging resistance
  • genetic diversity
  • yield trait

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Published Papers (1 paper)

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Research

22 pages, 10861 KB  
Article
Characterization and Genetic Diversity of IIAM Doubled-Haploid Maize Inbred Lines for Agro-Morphological Traits
by Kolawole Peter Oladiran, Rogerio Marcos Chiulele, Pedro Silvestre Chauque, Pedro Fato, Suwilanji Nanyangwe, Constantino Francisco Lhamine and Mable Chebichii Kipkoech
Agronomy 2026, 16(10), 984; https://doi.org/10.3390/agronomy16100984 (registering DOI) - 15 May 2026
Viewed by 208
Abstract
Genetic diversity within maize inbred populations is essential for sustaining genetic gain in breeding programmes. This study evaluated 280 maize inbred lines with two checks using an augmented block design (22 × 14). At harvest, 271 lines and two checks were analysed, with [...] Read more.
Genetic diversity within maize inbred populations is essential for sustaining genetic gain in breeding programmes. This study evaluated 280 maize inbred lines with two checks using an augmented block design (22 × 14). At harvest, 271 lines and two checks were analysed, with nine entries excluded due to poor survival. Using both descriptive (24) and quantitative (19) traits, significant variations were observed across many traits. Descriptive traits varied among the genotypes, as revealed by graphical analysis and correlation heatmaps. The likelihood ratio test (LRT) for lines showed significant differences for several quantitative traits with moderate–high heritability, while anthesis–silking interval, tassel length, ear position, ear aspect, bad husk cover, number of plants, and number of ears per plant exhibited low heritability. High genetic advance as a percentage of the mean was observed for grain yield, plant height, grain texture, number of plants, number of kernels, and grain weight per plant. Positive associations were observed among genotypic coefficient of variation, genetic advance, and heritability. Grain yield showed significant positive correlations with yield-related traits and morphological traits, but negative correlations with flowering traits. The first 10 principal components explained 86.17% of total variation, with flowering traits contributing most to variability in PC 1. Cluster analysis grouped genotypes into 10 clusters, with substantial genetic divergence within and between cluster groups. In conclusion, the study revealed considerable genetic diversity, supporting the selection of superior parents in breeding programmes and developing improved maize varieties to enhance productivity. Full article
(This article belongs to the Special Issue Development and Utilization of Maize Germplasm Resources)
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