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Correlation Study Between Canopy Temperature (CT) and Wheat Yield and Quality Based on Infrared Imaging Camera.

Yan Yu¹, Chenyang Li¹, Wei Shen¹

¹College of Agronomy, Northwest A&F University, Yangling 712100, China.

Plants (Basel, Switzerland)

|February 13, 2025

Summary

Wheat canopy temperature (CT) is a key indicator for predicting yield and quality. Cold-type wheat varieties show higher photosynthetic rates and grain weights, while warm-type varieties have better protein and gluten content under rainy conditions.

Keywords:

canopy temperature infrared imaging quality yield

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Area of Science:

Agronomy
Plant Physiology
Crop Science

Background:

Wheat canopy temperature (CT) is a vital physiological indicator for predicting wheat yield and quality post-flowering.
The precise relationship between CT and wheat yield/quality remains unclear, necessitating further investigation.
Accelerating new wheat variety selection requires a clearer understanding of CT's role.

Purpose of the Study:

To establish a connection between wheat canopy temperature (CT) and wheat yield and quality.
To investigate the influence of CT on photosynthetic rate (Pn), grain filling, yield, and quality traits.
To differentiate between cold-type and warm-type wheat materials based on temperature trends and performance.

Main Methods:

Measured CT, photosynthetic rate (Pn), filling rate, yield, and quality in 68 wheat lines.
Utilized infrared imaging to record CT in field conditions over two years (2022 and 2023).
Selected 20 materials with distinct temperature differences for comparative analysis and classification into cold-type and warm-type categories.

Main Results:

Cold-type wheat materials (e.g., 4 and 13) exhibited higher Pn and thousand-grain weights, with main grain filling in middle-to-late stages.
Warm-type wheat materials (e.g., 3 and 11) showed different filling periods and quality characteristics.
Under rainy conditions, cold-type materials had superior protein and wet gluten content, whereas warm-type materials excelled in sedimentation values and shorter formation times.

Conclusions:

Wheat canopy temperature serves as a reliable indicator for predicting wheat yield and quality traits.
Distinct cold-type and warm-type wheat varieties possess unique physiological and quality attributes.
Understanding CT-yield/quality relationships can significantly aid in the breeding and selection of improved wheat varieties.