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Suitability of the stress severity index combined with remote-sensing data as a tool to evaluate drought resistance traits in potato

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Title Suitability of the stress severity index combined with remote-sensing data as a tool to evaluate drought resistance traits in potato
 
Creator Hoelle, J.
Asch, F.
Khan, A.
Bonierbale, M.
 
Subject crops
drought
phenology
Solanum tuberosum
thermography
 
Description Potato is a drought susceptible crop and even short drought spells reduce tuber yields notably. In an earlier study we developed a stress severity index (SSI) based on the development stage of a genotype at the onset of drought and the soil water deficit based on soil water tension. Here, we test the suitability of the SSI combined with remotely sensed data as a screening tool to select drought-tolerant potato geno-types. Normalized difference vegetation index (NDVI) and the photochemical reflec-tance index (PRI) were obtained from reflectance measurements and thermography. Temperature data from the thermography allow using the difference between leaf and air temperature (∆T) to estimate the transpirational cooling of the leaves. Via clus-ter analysis including SSI, tuber yield reduction under drought, NDVI, PRI and ther-mography, three groups were distinguished: 1. SSI < 1000 with fast decreasing NDVI, PRI and ∆T, 2. SSI 1000–2000 with almost constant NDVI and ∆T and 3. SSI > 2000 described by small changes of NDVI, PRI and temperature deficit. For SSI < 1000, ∆T, PRI and NDVI showed to be good indicators of genotypic performance under drought. Potential strategies for drought resistance in potato detectable through remote sens-ing are discussed.
 
Date 2023-09-15
2023-10-17T15:18:54Z
2023-10-17T15:18:54Z
 
Type Journal Article
 
Identifier Hoelle, J.; Asch, F.; Khan, A.; Bonierbale, M. 2023. Suitability of the stress severity index combined with remote‐sensing data as a tool to evaluate drought resistance traits in potato. Journal of Agronomy and Crop Science. ISSN 1439-037X.
1439-037X
https://hdl.handle.net/10568/132301
https://doi.org/10.1111/jac.12671
 
Language en
 
Rights CC-BY-NC-ND-4.0
Open Access
 
Format 11 p.
 
Source Journal of Agronomy and Crop Science