Allelic variants of a potato HEAT SHOCK COGNATE 70 gene confer improved tuber yield under a wide range of environmental conditions
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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.
Campbell , R , Ducreux , L , Cowan , G , Young , V , Chinoko , G , Chitedze , G , Kwendani , S , Chiipanthenga , M , Bita , C E , Mwenye , O , Were , H , Torrance , L , Sharma , S K , Hancock , R D , Bryan , G J & Taylor , M 2022 , ' Allelic variants of a potato HEAT SHOCK COGNATE 70 gene confer improved tuber yield under a wide range of environmental conditions ' , Food and Energy Security , vol. Early View , e377 . https://doi.org/10.1002/fes3.377
Food and Energy Security
Copyright © 2022 The Authors. Food and Energy Security published by John Wiley & Sons Ltd. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
DescriptionFunding: This work was funded by the Scottish Government Rural and Environment Science and Analytical Services Division as part of the Strategic Research Programme 2016‐2022, by a GCRF Foundation Awards for Global Agricultural and Food Systems Research funded by the BBSRC project BB/P022553/1 (Quickgro) and EPSRC Reference: EP/T01525X/1, GCRF Global Research Translation Awards, Food Security and Health for East Africa, 2019‐2021, and the European Union’s Horizon 2020 research and innovation programme ADAPT (Accelerated Development of Multiple‐Stress Tolerant Potato), grant agreement No GA 2020 862‐858 and G2P‐SOL (Linking genetic resources, genomes and phenotypes of Solanaceous crops) grant agreement No 677379.
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