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  Genome-wide approach to identify quantitative trait loci for drought tolerance in tetraploid potato (Solanum tuberosum L.)

Schumacher, C., Thümecke, S., Schilling, F., Koehl, K. I., Kopka, J., Sprenger, H., et al. (2021). Genome-wide approach to identify quantitative trait loci for drought tolerance in tetraploid potato (Solanum tuberosum L.). International Journal of Molecular Sciences, 22(11): 6123. doi:10.3390/ijms22116123.

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Schumacher, Christina1, Author
Thümecke, Susanne1, Author
Schilling, Florian1, Author
Koehl, K. I.2, Author              
Kopka, J.3, Author              
Sprenger, H.4, Author              
Hincha, D. K.4, Author              
Walther, D.5, Author              
Seddig, Sylvia1, Author
Peters, Rolf1, Author
Zuther, E.4, Author              
Haas, M.2, Author              
Horn, Renate1, Author
Affiliations:
1External Organizations, ou_persistent22              
2Plant Cultivation and Transformation, Infrastructure Groups and Service Units, Max Planck Institute of Molecular Plant Physiology, Max Planck Society, ou_1753305              
3Applied Metabolome Analysis, Department Willmitzer, Max Planck Institute of Molecular Plant Physiology, Max Planck Society, ou_1753338              
4Transcript Profiling, Infrastructure Groups and Service Units, Max Planck Institute of Molecular Plant Physiology, Max Planck Society, ou_1753306              
5BioinformaticsCIG, Infrastructure Groups and Service Units, Max Planck Institute of Molecular Plant Physiology, Max Planck Society, ou_1753303              

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 Abstract: 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.

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Language(s): eng - English
 Dates: 2021
 Publication Status: Published in print
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 Table of Contents: -
 Rev. Type: -
 Identifiers: DOI: 10.3390/ijms22116123
BibTex Citekey: ijms22116123
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Title: International Journal of Molecular Sciences
  Abbreviation : Int. J. Mol. Sci.
Source Genre: Journal
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Publ. Info: Basel, Switzerland : MDPI AG
Pages: - Volume / Issue: 22 (11) Sequence Number: 6123 Start / End Page: - Identifier: ISSN: 1422-0067
CoNE: https://pure.mpg.de/cone/journals/resource/1422-0067