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A Telemetric, Gravimetric Platform for Real-Time Physiological Phenotyping of Plant–Environment Interactions
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A High-Throughput, Field-Based Phenotyping Technology for Tall Biomass Crops.
Maria G Salas Fernandez1, Yin Bao2, Lie Tang2
1Department of Agronomy, Iowa State University, Ames, Iowa 50011 mgsalas@iastate.edu.
Plant Physiology
|June 17, 2017
Summary
We developed Phenobot 1.0, a high-throughput phenotyping platform for tall crops like sorghum. It accurately measures plant height and stem diameter using 3D imaging, advancing crop genetics research.
Area of Science:
- Agricultural Science
- Plant Biology
- Biotechnology
Background:
- Omics technologies have advanced rapidly, but phenotyping methods lag behind in efficiency and cost-effectiveness for complex trait dissection.
- Existing high-throughput phenotyping platforms are often limited to controlled environments or short-stature crops, neglecting challenges in tall, dense canopies.
Purpose of the Study:
- To develop and validate Phenobot 1.0, an automated, field-based high-throughput phenotyping platform for tall, dense canopy crops like sorghum (Sorghum bicolor).
- To assess the accuracy of different algorithms for estimating plant height and stem diameter using 3D reconstructed images.
Main Methods:
- Phenobot 1.0, an auto-steered, self-propelled platform with stereo RGB cameras, was deployed for sorghum phenotyping.
- 3D reconstruction of images from 307 sorghum lines enabled feature extraction for plant height and stem diameter.
- Algorithms evaluated included User-interactive Individual Plant Height Extraction (UsIn-PHe), Automatic Hedge-based Plant Height Extraction (Auto-PHe), and two stem diameter extraction methods (User-interactive Dense Stereo Matching and Image Patch Stereo Matching Stem Diameter Extraction - IPaS-Di).
Main Results:
- Both UsIn-PHe and Auto-PHe accurately estimated plant height, with Auto-PHe offering full automation.
- IPaS-Di provided the most accurate estimates for stem diameter, a key biomass-related trait.
- The platform proved robust for obtaining ground-based, high-throughput plant architecture parameters in sorghum.
Conclusions:
- Phenobot 1.0 offers a robust solution for high-throughput phenotyping of tall, dense canopy crops, addressing a critical gap in current technologies.
- Accurate estimation of plant architecture traits like height and stem diameter is achievable with this automated, field-based system.
- This technology facilitates genetic dissection of complex traits in crops like sorghum, accelerating breeding programs.
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