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Worldwide selection footprints for drought and heat in bread wheat (Triticum aestivum L.)

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Title Worldwide selection footprints for drought and heat in bread wheat (Triticum aestivum L.)
 
Creator Gómez-Espejo, Ana L.
Sansaloni, Carolina Paola
Burgueño, Juan
Toledo, Fernando H.
Benavides-Mendoza, Adalberto
Reyes-Valdés, M. Humberto
 
Subject adaptation
drought stress
heat stress
landraces
Triticum aestivum
 
Description Genome–environment Associations (GEA) or Environmental Genome-Wide Association scans (EnvGWAS) have been poorly applied for studying the genomics of adaptive traits in bread wheat landraces (Triticum aestivum L.). We analyzed 990 landraces and seven climatic variables (mean temperature, maximum temperature, precipitation, precipitation seasonality, heat index of mean temperature, heat index of maximum temperature, and drought index) in GEA using the FarmCPU approach with GAPIT. Historical temperature and precipitation values were obtained as monthly averages from 1970 to 2000. Based on 26,064 high-quality SNP loci, landraces were classified into ten subpopulations exhibiting high genetic differentiation. The GEA identified 59 SNPs and nearly 89 protein-encoding genes involved in the response processes to abiotic stress. Genes related to biosynthesis and signaling are mainly mediated by auxins, abscisic acid (ABA), ethylene (ET), salicylic acid (SA), and jasmonates (JA), which are known to operate together in modulation responses to heat stress and drought in plants. In addition, we identified some proteins associated with the response and tolerance to stress by high temperatures, water deficit, and cell wall functions. The results provide candidate regions for selection aimed to improve drought and heat tolerance in bread wheat and provide insights into the genetic mechanisms involved in adaptation to extreme environments.
 
Date 2022-09-01
2023-01-13T14:03:32Z
2023-01-13T14:03:32Z
 
Type Journal Article
 
Identifier Gómez-Espejo, A.L., Sansaloni, C.P., Burgueño, J., Toledo, F.H., Benavides-Mendoza, A. and Reyes-Valdés, M.H. 2022. Worldwide selection footprints for drought and heat in bread wheat (Triti-cum aestivum L.). Plants 11(17):2289. https://hdl.handle.net/10883/22286
2223-7747
https://hdl.handle.net/10568/127057
https://hdl.handle.net/10883/22286
https://doi.org/10.3390/plants11172289
 
Language en
 
Rights CC-BY-4.0
Open Access
 
Format application/pdf
 
Source Plants