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Related Experiment Video

Updated: Mar 11, 2026

A Simple Protocol for Mapping the Plant Root System Architecture Traits

A Simple Protocol for Mapping the Plant Root System Architecture Traits

Published on: February 10, 2023

Enhancing phosphorus uptake efficiency through QTL-based selection for root system architecture in maize.

Riliang Gu¹, Fanjun Chen², Lizhi Long²

¹Key Lab of Plant-Soil Interaction, MOE, Center for Resources, Environment and Food Security, College Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China; College of Agronomy and Biotechnology, China Agricultural University, Beijing 100193, China.

Journal of Genetics and Genomics = Yi Chuan Xue Bao

|November 28, 2016

Summary

Improving maize phosphorus use efficiency (PUE) was achieved by genetically enhancing root system architecture (RSA). This study identified quantitative trait loci (QTLs) for both PUE and RSA, leading to the development of P-efficient maize lines.

Keywords:

Maize Marker-assisted selection Phosphorus Quantitative trait loci Root system architecture

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Lateral Root Inducible System in Arabidopsis and Maize

Lateral Root Inducible System in Arabidopsis and Maize

Published on: January 14, 2016

Area of Science:

Plant Genetics and Breeding
Agricultural Science
Crop Physiology

Background:

Root system architecture (RSA) is crucial for phosphorus (P) acquisition in plants.
Enhancing phosphorus use efficiency (PUE) in maize through genetic manipulation of RSA remains underexplored.
Understanding the genetic basis of RSA and its relationship with PUE is vital for crop improvement.

Purpose of the Study:

To investigate the genetic relationships between PUE and RSA in maize.
To develop P-efficient maize lines by selecting quantitative trait loci (QTLs) associated with both traits.
To evaluate the effectiveness of marker-assisted selection (MAS) for improving PUE in maize.

Main Methods:

Utilized a maize recombinant inbred line (RIL) population for genetic analysis.
Conducted hydroponic and field experiments to assess PUE, P uptake efficiency (PupE), and RSA.
Performed QTL analysis to identify genomic regions controlling PUE and RSA, followed by MAS.

Main Results:

In low-P conditions, PupE strongly correlated with PUE, and RSA in hydroponics related to PupE.
Identified two QTL clusters (Cl-bin3.04a and Cl-bin3.04b) associated with PUE, PupE, and RSA.
MAS identified nine lines with 22%-26% increased PUE in low-P fields; one line showed enhanced PupE via root morphology changes.

Conclusions:

RSA significantly contributes physiologically and genetically to maize P uptake efficiency.
QTL-based selection is a successful strategy for developing P-efficient maize varieties.
This study provides a framework for improving crop P efficiency through targeted genetic approaches.