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Abstract
Previously, we developed and applied a glasshouse screen for potato tuber yield under heat stress and identified a candidate gene (HSc70) for heat tolerance by genetic analysis of a diploid potato population. Specific allelic variants were expressed at high levels on exposure to moderately elevated temperature due to variations in gene promoter sequence. In this study, we aimed to confirm the results from the glasshouse screen in field trials conducted over several seasons and locations including those in Kenya, Malawi and the UK. We extend our understanding of the HSc70 gene and demonstrate that expression level of HSc70 correlates with tolerance to heat stress in a wide range of wild potato relatives. The physiological basis of the protective effect of HSc70 was explored and we show that genotypes carrying the highly expressed HSc70 A2 allele are protected against photooxidative damage to PSII induced by abiotic stresses. Overall, we show the potential of HSc70 alleles for breeding resilient potato genotypes for multiple environments.
Original language | English |
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Article number | e377 |
Number of pages | 14 |
Journal | Food and Energy Security |
Volume | Early View |
Early online date | 15 Mar 2022 |
DOIs | |
Publication status | E-pub ahead of print - 15 Mar 2022 |
Keywords
- Abiotic stress
- Field trial
- HEAT SHOCK COGNATE 70
- Potato
- Promoter
- Yield
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Dive into the research topics of 'Allelic variants of a potato HEAT SHOCK COGNATE 70 gene confer improved tuber yield under a wide range of environmental conditions'. Together they form a unique fingerprint.Projects
- 1 Finished
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Lesley Torrance: The quikgro potato: an early maturing multiple stress tolerant potato crop for sub-Saharan Africa
Torrance, L. (PI)
2/06/17 → 31/05/19
Project: Standard