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Article

Genome-Wide Approach to Identify Quantitative Trait Loci for Drought Tolerance in Tetraploid Potato (Solanum tuberosum L.)

1
Department of Plant Genetics, Institute of Biological Sciences, University of Rostock, Albert-Einstein-Str. 3, 18059 Rostock, Germany
2
Max Planck Institute of Molecular Plant Physiology, Am Mühlenberg 1, 14476 Potsdam, Germany
3
Institute for Resistance Research and Stress Tolerance, Julius-Kühn Institut, Federal Research Centre for Cultivated Plants, Rudolf-Schick-Platz 3, 18190 Sanitz, Germany
4
Landwirtschaftskammer Niedersachsen, Dethlingen 14, 29633 Munster, Germany
*
Author to whom correspondence should be addressed.
Co-first authorship.
Present Address: Department of Animal Physiology, Institute of Biological Sciences, University of Rostock, Albert-Einstein-Str. 3, 18059 Rostock, Germany.
§
Present Address: Department of Food Safety, German Federal Institute for Risk Assessment, Max-Dohrn-Straße 8-10, 10589 Berlin, Germany.
Deceased.
Present Address: PotatoConsult UG, Hiddinger Straße 33, 27374 Visselhövede, Germany.
**
Present Address: Ministry of Agriculture, Environment and Climate Protection, Henning-von-Tresckow-Straße 2-13, 14467 Potsdam, Germany.
Academic Editors: Katarzyna Hura, Agnieszka Ostrowska and Tomasz Hura
Int. J. Mol. Sci. 2021, 22(11), 6123; https://doi.org/10.3390/ijms22116123
Received: 6 May 2021 / Revised: 30 May 2021 / Accepted: 2 June 2021 / Published: 7 June 2021
(This article belongs to the Special Issue Drought-Stress Induced Physiological and Molecular Changes in Plants)
Drought represents a major abiotic stress factor negatively affecting growth, yield and tuber quality of potatoes. Quantitative trait locus (QTL) analyses were performed in cultivated potatoes for drought tolerance index DRYM (deviation of relative starch yield from the experimental median), tuber starch content, tuber starch yield, tuber fresh weight, selected transcripts and metabolites under control and drought stress conditions. Eight genomic regions of major interest for drought tolerance were identified, three representing standalone DRYM QTL. Candidate genes, e.g., from signaling pathways for ethylene, abscisic acid and brassinosteroids, and genes encoding cell wall remodeling enzymes were identified within DRYM QTL. Co-localizations of DRYM QTL and QTL for tuber starch content, tuber starch yield and tuber fresh weight with underlying genes of the carbohydrate metabolism were observed. Overlaps of DRYM QTL with metabolite QTL for ribitol or galactinol may indicate trade-offs between starch and compatible solute biosynthesis. Expression QTL confirmed the drought stress relevance of selected transcripts by overlaps with DRYM QTL. Bulked segregant analyses combined with next-generation sequencing (BSAseq) were used to identify mutations in genes under the DRYM QTL on linkage group 3. Future analyses of identified genes for drought tolerance will give a better insight into drought tolerance in potatoes. View Full-Text
Keywords: drought tolerance; ethylene; brassinosteroids; cell wall; tuber starch content; tuber starch yield; metabolites; transcript markers; potato; Solanum tuberosum drought tolerance; ethylene; brassinosteroids; cell wall; tuber starch content; tuber starch yield; metabolites; transcript markers; potato; Solanum tuberosum
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MDPI and ACS Style

Schumacher, C.; Thümecke, S.; Schilling, F.; Köhl, K.; Kopka, J.; Sprenger, H.; Hincha, D.K.; Walther, D.; Seddig, S.; Peters, R.; Zuther, E.; Haas, M.; Horn, R. Genome-Wide Approach to Identify Quantitative Trait Loci for Drought Tolerance in Tetraploid Potato (Solanum tuberosum L.). Int. J. Mol. Sci. 2021, 22, 6123. https://doi.org/10.3390/ijms22116123

AMA Style

Schumacher C, Thümecke S, Schilling F, Köhl K, Kopka J, Sprenger H, Hincha DK, Walther D, Seddig S, Peters R, Zuther E, Haas M, Horn R. Genome-Wide Approach to Identify Quantitative Trait Loci for Drought Tolerance in Tetraploid Potato (Solanum tuberosum L.). International Journal of Molecular Sciences. 2021; 22(11):6123. https://doi.org/10.3390/ijms22116123

Chicago/Turabian Style

Schumacher, Christina, Susanne Thümecke, Florian Schilling, Karin Köhl, Joachim Kopka, Heike Sprenger, Dirk K. Hincha, Dirk Walther, Sylvia Seddig, Rolf Peters, Ellen Zuther, Manuela Haas, and Renate Horn. 2021. "Genome-Wide Approach to Identify Quantitative Trait Loci for Drought Tolerance in Tetraploid Potato (Solanum tuberosum L.)" International Journal of Molecular Sciences 22, no. 11: 6123. https://doi.org/10.3390/ijms22116123

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