Related Experiment Video
Updated: Oct 5, 2025
08:32
PARbars: Cheap, Easy to Build Ceptometers for Continuous Measurement of Light Interception in Plant Canopies
Published on: May 9, 2019
9.6K
Normalization method for canopy temperature as an indirect indicator of yield potential in wheat breeding programs.
Shizen Ohnishi1, Masashi Kasuya1,2, Tatsuya Sonoda1
1Hokkaido Research Organization Kitami Agricultural Experiment Station, Kunneppu, Tokoro-gun, Hokkaido 099-1496, Japan.
Breeding Science
|January 28, 2022
Summary
Canopy temperature (CT) is a yield indicator, but environmental factors complicate measurements. A new normalization method, focusing on specific times and neighboring lines, improves genetic variation evaluation for plant breeders.
Area of Science:
- Plant Science
- Agricultural Science
- Genetics
Background:
- Canopy temperature (CT) is linked to crop yield potential and serves as a crucial indicator in breeding programs.
- Accurate genetic evaluation of CT is challenging in large-scale breeding due to significant environmental influences.
Purpose of the Study:
- To identify key environmental factors affecting CT measurements.
- To develop a practical normalization method to mitigate environmental impacts on CT data.
- To enhance the precision of genetic variation assessment in breeding programs.
Main Methods:
- CT was measured in CT-high and CT-low cultivars across diverse field conditions.
- Environmental variables influencing CT, such as fluctuating sun/shade and field position, were analyzed.
- A normalization technique involving comparison with neighboring lines was applied and evaluated.
- Optimal measurement time windows for maximizing cultivar differences were determined.
Main Results:
- CT exhibited rapid fluctuations in response to changes in sun and shade.
- Field position significantly impacted CT readings.
- Normalization by neighboring lines enhanced the clarity of genetic differences.
- CT measurements taken between 12:00 and 15:00 showed the greatest cultivar differentiation.
Conclusions:
- Environmental factors critically influence CT measurements, necessitating careful consideration in breeding programs.
- A proposed normalization method, combined with specific measurement conditions (12:00-15:00, normalized by neighbors), effectively minimizes environmental noise.
- This approach facilitates more accurate genetic variation assessment and aids breeders in selecting high-yield crop lines using CT.
Related Concept Videos
02:45Responses to Heat and Cold Stress
14.0K
Every organism has an optimum temperature range within which healthy growth and physiological functioning can occur. At the ends of this range, there will be a minimum and maximum temperature that interrupt biological processes.
14.0K
02:16Light Acquisition
8.7K
In order to produce glucose, plants need to capture sufficient light energy. Many modern plants have evolved leaves specialized for light acquisition. Leaves can be only millimeters in width or tens of meters wide, depending on the environment. Due to competition for sunlight, evolution has driven the evolution of increasingly larger leaves and taller plants, to avoid shading by their neighbors with contaminant elaboration of root architecture and mechanisms to transport water and nutrients.
8.7K