Abstract
There are many applications of image-based analysis for phenotyping agronomic traits. However, they are inappropriate or difficult to operate due to lack of time, equipment, and financial limits. In this report, we demonstrate fast and reliable phenotyping methods to screen drought tolerance in soybeans (Glycine max L.) using the green area of the canopy from the image sensor. Vertical images obtained from the commercial digital camera and processed on free software called Canopeo were used for initial screening for drought stress evaluation. As a result, this method positively correlated with the number of nodes, which is the indicator of the yield components. It also showed that the green area of the canopy has significantly been affected by drought, and varieties than the number of nodes. This simple method using the digital images obtained in a cost-effective manner would be useful for initial drought evaluations.
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Acknowledgements
The authors gratefully acknowledge to the 2021 scientific promotion program by Jeju National University. Also, we thank Sustainable Agriculture Research Institute (SARI) in Jeju National University for providing the experimental facilities.
Funding
This research was supported by the Next-Generation BioGreen 21 Program (Project No. PJ01451203), Rural Development Administration, Republic Korea and Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (2019R1A6A1A11052070).
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Conceptualization, YSC, YK, STK and KHK: validation, SCY and YSC: formal analysis, RR: data curation, JP, JHJ, JB, and EL: writing, JK, and JKY: All authors have read and agreed to the published version of the manuscript.
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Kim, J., Yu, JK., Rodrogues, R. et al. Case study: cost-effective image analysis method to study drought stress of soybean in early vegetative stage. J. Crop Sci. Biotechnol. 25, 33–37 (2022). https://doi.org/10.1007/s12892-021-00110-8
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DOI: https://doi.org/10.1007/s12892-021-00110-8