Allelic variants of a potato <i>HEAT SHOCK COGNATE 70</i> gene confer improved tuber yield under a wide range of environmental conditions

Campbell, Raymond; Ducreux, Laurence J. M.; Cowan, G. H.; Young, Vanessa; Chinoko, Gift; Chitedze, Gloria; Kwendani, Stanley; Chiipanthenga, M.; Bita, Craita E.; Mwenye, O.; Wéré, Hassan Karakacha; Torrance, Lesley; Sharma, Sanjeev Kumar; Hancock, Robert D.; Bryan, Glenn; Taylor, Mark A.

doi:10.1002/fes3.377

Cited by 7 publications

(5 citation statements)

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“…By crossing susceptible and tolerant inbred lines, a mapping population can be created. For subsequent research, these mapping populations can be used for molecular studies to unravel the mechanisms of tuberisation under high temperatures (Campbell et al, 2022). When screening such a mapping population for high temperature tolerance, it is important to choose and control the climate conditions carefully because the plants can respond differently to high temperature under different light conditions.…”

Section: Conclusion and Implicationmentioning

confidence: 99%

Shedding light on a hot topic: Tuberisation in potato

Stockem

Vries²,

Struik

2023

Annals of Applied Biology

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Growing small seedling tubers from true seed, comparable with mini tubers, in controlled conditions could be a method to multiply healthy starting material of potato. In indoor farming systems, the conditions can be optimised for high production. In field trials, it is impossible to investigate the effects of environmental factors such as temperature and light separately. In this study, we performed three climate room experiments in which the effects of light intensity, temperature and percentage of far‐red light in the light spectrum on tuber production were assessed. We found that increasing the average temperature reduced tuber number and tuber weight. Increasing the diurnal temperature variation while keeping the average temperature equal resulted in increased tuber size. The light treatments on the other hand only affected the number of tubers per plant: increasing light intensity and increasing the percentage of far‐red light in the spectrum enhanced the number of tubers. Moreover, interaction in tuber production between inbred lines and temperature was significant, with some inbred lines being relatively tolerant to high temperature. These findings will help breed for heat tolerant varieties and optimise growing conditions for tuber production in indoor farming systems.

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Section: Conclusion and Implicationmentioning

confidence: 99%

Shedding light on a hot topic: Tuberisation in potato

Stockem

Vries²,

Struik

2023

Annals of Applied Biology

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“…The superoxide dismutase gene family has also been found to be responsible for conferring heat tolerance in potatoes [ 16 ] along with other antioxidants like ascorbate peroxidase (APX) and nucleoside diphosphate kinase (NDPK2) [ 17 ]. Heat-shock protein genes like HSP17.7 [ 18 ] and Heat Shock Cognate 70 are reported to confer heat tolerance in potatoes [ 19 , 20 ]. Transcription factors like CAPSICUM ANNUUM PATHOGEN FREEZING TOLERANCE PROTEIN 1 ( CaPF1 ) [ 21 ], C-REPEAT BINDING FACTOR 1 ( CBF3 ) [ 22 ], and ETHYLENE RESPONSE FACTOR ( StERF94 ) [ 23 ] have been associated with heat tolerance in potatoes through transgenic studies.…”

Section: Introductionmentioning

confidence: 99%

“…They used nodal cuttings to phenotype heat tolerance. They reported a QTL at linkage group 4a, and the candidate gene HSP70, conferring heat tolerance, was later confirmed [ 20 ]. Though the study focused on the tuberization signal and overall yield, the defects observed in the field were not phenotyped.…”

Section: Introductionmentioning

confidence: 99%

Genetic Basis of Potato Tuber Defects and Identification of Heat-Tolerant Clones

Gautam,

Pandey,

Scheuring

et al. 2024

Plants

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Heat stress during the potato growing season reduces tuber marketable yield and quality. Tuber quality deterioration includes external (heat sprouts, chained tubers, knobs) and internal (vascular discoloration, hollow heart, internal heat necrosis) tuber defects, as well as a reduction in their specific gravity and increases in reducing sugars that result in suboptimal (darker) processed products (french fries and chips). Successfully cultivating potatoes under heat-stress conditions requires planting heat-tolerant varieties that can produce high yields of marketable tubers, few external and internal tuber defects, high specific gravity, and low reducing sugars (in the case of processing potatoes). Heat tolerance is a complex trait, and understanding its genetic basis will aid in developing heat-tolerant potato varieties. A panel of 217 diverse potato clones was evaluated for yield and quality attributes in Dalhart (2019 and 2020) and Springlake (2020 and 2021), Texas, and genotyped with the Infinium 22 K V3 Potato Array. A genome-wide association study was performed to identify genomic regions associated with heat-tolerance traits using the GWASpoly package. Quantitative trait loci were identified on chromosomes 1, 3, 4, 6, 8, and 11 for external defects and on chromosomes 1, 2, 3, 10, and 11 for internal defects. Yield-related quantitative trait loci were detected on chromosomes 1, 6, and 10 pertaining to the average tuber weight and tuber number per plant. Genomic-estimated breeding values were calculated using the StageWise package. Clones with low genomic-estimated breeding values for tuber defects were identified as donors of good traits to improve heat tolerance. The identified genomic regions associated with heat-tolerance attributes and the genomic-estimated breeding values will be helpful to develop new potato cultivars with enhanced heat tolerance in potatoes.

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“…Recent studies have emphasized that biotic and abiotic environmental stresses limit and reduce the production and productivity of food crops (Waqas et al, 2019;Gull et al, 2019). Factors that impact on potato yield are not well understood, however, maintaining yield under stress conditions is one of the highest focusses of modern agriculture (Campbell et al, 2022). For this reason, it is important to develop adequate protocols to measure the impact of these stresses on the yield of food crops, and even more so when the threat of climate change becomes increasingly important.…”

Section: Introductionmentioning

confidence: 99%

Effect of moderate heat stress on tuberization of potato genotypes: Morphological and physiological changes using in vitro and ex vitro propagation

Delgado-Paredes,

Rojas-Idrogo,

Vásquez-Díaz

et al. 2024

Sci. agropecu.

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Potato plants are often subjected to heat stress during growth and development, resulting in loss of yield and quality. However, the possibility exists that commercially important genotypes show tolerance to heat stress. In this study, we aim to investigate the morphological and physiological effects of moderate conditions of heat stress on tuberization in nine potato genotypes, and how it affects propagation using an ex vitro and in vitro system. The plant material came from the In Vitro Germplasm Bank of the International Potato Center (CIP). The incubation temperatures of the cultures in in vitro and ex vitro conditions were the ambient in the laboratory and greenhouse, respectively. In in vitro system a randomized complete block design was employed in nine genotypes, two treatments: multiplication culture medium and the same culture medium supplemented with 8.0% sucrose and 500 mg/L-1 CCC, six flasks and five explants per experimental unit. Among all genotypes evaluated, Leona and Liberteña did not form tubers under ex vitro treatment conditions. Under in vitro conditions, Amarilis, Capiro, Perricholi and Tacna showed no evidence of tuberization, and Canchán was the only genotype where 100% formation of tuberous structures were produced in all evaluations. The findings concluded in this study showed that of all the potatoes evaluated, Canchán best responded to the evaluations under both in ex vitro and in vitro conditions, at maximum temperatures between 22.4 to 26.9 and 27.0 to 28.2 oC, respectively. Therefore, it is vitally important to consider its development potential in different producing locations around the world, which are directly and indirectly affected by climate change.

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Allelic variants of a potato HEAT SHOCK COGNATE 70 gene confer improved tuber yield under a wide range of environmental conditions

Cited by 7 publications

References 50 publications

Shedding light on a hot topic: Tuberisation in potato

Shedding light on a hot topic: Tuberisation in potato

Genetic Basis of Potato Tuber Defects and Identification of Heat-Tolerant Clones

Effect of moderate heat stress on tuberization of potato genotypes: Morphological and physiological changes using in vitro and ex vitro propagation

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