Related Experiment Video
Updated: Jun 27, 2026
06:41
Imaging and Analysis for Quantifying Maize (Zea mays) Abiotic Stress Phenotypes
Published on: March 28, 2025
Addressing drought tolerance in maize by transcriptional profiling and mapping
Rosanna Marino1, Maharajah Ponnaiah, Pawel Krajewski
1Department of Biomolecular Sciences and Biotechnology, University of Milano, Via Celoria 26, 20133, Milan, Italy.
Molecular Genetics and Genomics : MGG
|November 20, 2008
Summary
Researchers mapped quantitative trait loci (QTLs) and profiled gene expression to understand maize drought tolerance. They identified 50 QTLs and 22 candidate genes, advancing efforts to improve crop water-stress resilience.
Area of Science:
- Plant Genetics
- Molecular Biology
- Agronomy
Background:
- Improving crop water-stress tolerance is crucial for global food security.
- The genetic basis of plant drought tolerance is complex and not fully understood.
- Maize (Zea mays) is a vital crop susceptible to drought impacts.
Purpose of the Study:
- To unravel the genetic architecture of plant response to drought.
- To identify quantitative trait loci (QTLs) associated with drought tolerance in maize.
- To discover candidate genes involved in drought stress response through transcript profiling.
Main Methods:
- Integrated approach combining quantitative trait loci (QTL) mapping and transcript profiling.
- Phenotypic data analysis of maize Recombinant Inbred Lines (RILs) under well-watered and water-stress conditions.
- Oligoarray-based transcript profiling of immature maize kernels from contrasting genotypes under different water regimes.
Main Results:
- Identified 50 significant QTLs for drought tolerance distributed across nine maize chromosomes.
- Detected 252 genes significantly affected by water stress in at least one genotype.
- Localized 88 differentially expressed genes onto the linkage map, with 22 co-localizing with drought tolerance QTLs.
Conclusions:
- The study identified genomic regions and candidate genes associated with maize drought tolerance.
- This integrated approach provides a foundation for further functional studies and breeding for improved water-use efficiency.
- The identified candidate genes offer targets for developing more resilient maize varieties.
Related Concept Videos
02:41Responses to Drought and Flooding
Water plays a significant role in the life cycle of plants. However, insufficient or excess of water can be detrimental and pose a serious threat to plants.
01:10Transcription
Overview
Transcription is the process of synthesizing RNA from a DNA sequence by RNA polymerase. It is the first step in producing a protein from a gene sequence. Additionally, many other proteins and regulatory sequences are involved in the proper synthesis of messenger RNA (mRNA). Regulation of transcription is responsible for the differentiation of all the different types of cells and often for the proper cellular response to environmental signals.
Transcription Can Produce Different Kinds...
Transcription is the process of synthesizing RNA from a DNA sequence by RNA polymerase. It is the first step in producing a protein from a gene sequence. Additionally, many other proteins and regulatory sequences are involved in the proper synthesis of messenger RNA (mRNA). Regulation of transcription is responsible for the differentiation of all the different types of cells and often for the proper cellular response to environmental signals.
Transcription Can Produce Different Kinds...
01:57Adaptations that Reduce Water Loss
Though evaporation from plant leaves drives transpiration, it also results in loss of water. Because water is critical for photosynthetic reactions and other cellular processes, evolutionary pressures on plants in different environments have driven the acquisition of adaptations that reduce water loss.