Maize Landraces: Conservation, Characterization and Exploitation

A special issue of Plants (ISSN 2223-7747). This special issue belongs to the section "Plant Molecular Biology".

Deadline for manuscript submissions: 30 September 2025 | Viewed by 193

Special Issue Editor


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Guest Editor
Department of Sustainable Crop Production, Università Cattolica del Sacro Cuore, 29122 Piacenza, Italy
Interests: agricultural genetics; breeding; maize; biodiversity; genetic resources

Special Issue Information

Dear Colleagues,

Maize is one of the most relevant crops in agriculture worldwide and represents a staple food in many areas of the world. Currently, agriculture is challenged by environmental constraints requiring the development of new plant varieties showing genetic tolerance to stress conditions. Maize is a very diverse crop, and landraces are adapted to extremely diverse environmental conditions, thus offering a valuable genetic base to breed for tolerance to suboptimal environments.

A considerable number of maize landraces have been sampled and maintained in germplasm collections worldwide, though many are still cultivated by smallholder farmers in underdeveloped countries or to promote the establishment of niche markets.

Unfortunately, a limited fraction of the broad genetic and phenotypic diversity available for this crop has been explored and exploited in breeding programs due to limited or absent information about genetic diversity, relatedness morphology, or the agronomic potential of landraces.

This Special Issue of Plants is dedicated to research aiming to achieve the characterization, from any perspective, of maize landraces to increase the available knowledge and promote the use of such genetic resources in research, agriculture, or breeding programs.

Dr. Lorenzo Stagnati
Guest Editor

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Keywords

  • germplasm resources
  • biodiversity
  • maize landraces
  • genetic diversity
  • genetic characterization
  • phenotypic characterization
  • agronomic characterization
  • breeding
  • historical information
  • adaptation

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Published Papers (1 paper)

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Research

21 pages, 1578 KiB  
Article
Genetic Diversity and Construction of Salt-Tolerant Core Germplasm in Maize (Zea mays L.) Based on Phenotypic Traits and SNP Markers
by Yongfeng Song, Jiahao Wang, Yingwen Ma, Jiaxin Wang, Liangliang Bao, Dequan Sun, Hong Lin, Jinsheng Fan, Yu Zhou, Xing Zeng, Zhenhua Wang, Lin Zhang, Chunxiang Li and Hong Di
Plants 2025, 14(14), 2182; https://doi.org/10.3390/plants14142182 - 14 Jul 2025
Viewed by 43
Abstract
Maize is an essential staple food, and its genetic diversity plays a central role in breeding programs aimed at developing climate-adapted cultivars. Constructing a representative core germplasm set is necessary for the efficient conservation and utilization of maize genetic resources. In this study, [...] Read more.
Maize is an essential staple food, and its genetic diversity plays a central role in breeding programs aimed at developing climate-adapted cultivars. Constructing a representative core germplasm set is necessary for the efficient conservation and utilization of maize genetic resources. In this study, we analyzed 588 cultivated maize accessions using agronomic traits such as plant morphology and yield traits such as ear characteristics and single-nucleotide polymorphisms (SNPs) to assess molecular diversity and population structure and to construct a core collection. Nineteen phenotypic traits were evaluated, revealing high genetic diversity and significant correlations among most quantitative traits. The optimal sampling strategy was identified as “Mahalanobis distance + 20% + deviation sampling + flexible method.” Whole-genome genotyping was conducted using the Maize6H-60K liquid phase chip. Population structure analysis, principal component analysis, and cluster analysis divided the 588 accessions into six subgroups. A core collection of 172 accessions was selected based on both phenotypic and genotypic data. These were further evaluated for salt–alkali tolerance during germination, and cluster analysis classified them into five groups. Sixty-five accessions demonstrated salt–alkali tolerance, including 18 with high resistance. This core collection serves as a valuable foundation for germplasm conservation and utilization strategies. Full article
(This article belongs to the Special Issue Maize Landraces: Conservation, Characterization and Exploitation)
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