Breeding for Heat-Stress Tolerance

Souza, Moacil Alves de; Pimentel, Adérico Júnior Badaró; Ribeiro, Guilherme

doi:10.1007/978-3-642-30553-5_9

Cited by 14 publications

(7 citation statements)

References 31 publications

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“…Tolerant genotypes may also be selected in controlled environments. However, besides being more expensive, controlled environments do not allow natural selection for other factors that interact with the heat stress tolerance mechanisms under field conditions (Souza et al, 2012). Regardless the screening method, a key objective for plant breeders is to develop an effective set of thermotolerance markers which can be used to further implement heat tolerance into various crop species.…”

Section: Strategies To Crop Improvement For Heat Stress Tolerancementioning

confidence: 99%

Plant tolerance to high temperature in a changing environment: scientific fundamentals and production of heat stress-tolerant crops

Bita¹,

Geräts²

2013

Front. Plant Sci.

1,353

924

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Global warming is predicted to have a general negative effect on plant growth due to the damaging effect of high temperatures on plant development. The increasing threat of climatological extremes including very high temperatures might lead to catastrophic loss of crop productivity and result in wide spread famine. In this review, we assess the impact of global climate change on the agricultural crop production. There is a differential effect of climate change both in terms of geographic location and the crops that will likely show the most extreme reductions in yield as a result of expected extreme fluctuations in temperature and global warming in general. High temperature stress has a wide range of effects on plants in terms of physiology, biochemistry and gene regulation pathways. However, strategies exist to crop improvement for heat stress tolerance. In this review, we present recent advances of research on all these levels of investigation and focus on potential leads that may help to understand more fully the mechanisms that make plants tolerant or susceptible to heat stress. Finally, we review possible procedures and methods which could lead to the generation of new varieties with sustainable yield production, in a world likely to be challenged both by increasing population, higher average temperatures and larger temperature fluctuations.

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Section: Strategies To Crop Improvement For Heat Stress Tolerancementioning

confidence: 99%

Plant tolerance to high temperature in a changing environment: scientific fundamentals and production of heat stress-tolerant crops

Bita¹,

Geräts²

2013

Front. Plant Sci.

1,353

924

View full text Add to dashboard Cite

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“…The variation in genotype performance due to heat stress intensity is one of the main difficulties in breeding for heat tolerance (Souza et al, 2012). Differences in environments with high temperature, in association with different crop stages in which the stress occurs, is one of the factors considered in wheat breeding for heat tolerance in programs developed by CIMMYT (International Maize and Wheat Improvement Center -High Temperature Wheat Yield Trial) (Reynolds et al, 2001).…”

Section: Cultivarmentioning

confidence: 99%

Characterization of heat tolerance in wheat cultivars and effects on production components

Pimentel¹,

Rocha²,

Souza³

et al. 2015

Rev. Ceres

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There is a need for heat tolerant wheat cultivars adapted to the expansion of cultivation areas in warmer regions due to the high demand of this cereal for human consumption. The objective of this study was to evaluate the effect of high temperatures on grain yield and yield components of wheat and characterize heat tolerant wheat genotypes at different development stages. The genotypes were evaluated in the field with and without heat stress. High temperatures reduced the number of spikelets per spike (21%), number of grains per spike (39%), number of grains per spikelet (23%), 1000-grain weight (27%) and grain yield (79%). Cultivars MGS 1 Aliança, Embrapa 42, IAC 24-Tucuruí and IAC 364-Tucuruí III are the most tolerant to heat stress between the stages double ridge and terminal spikelet; MGS 1 Aliança, BRS 264, IAC 24-Tucuruí, IAC 364-Tucuruí III and VI 98053, between meiosis and anthesis; and BRS 254, IAC-24-Tucuruí, IAC-364-Tucuruí III and VI 98053, between anthesis and physiological maturity. High temperatures reduce grain yield and yield components. The number of grains per spike is the most reduced component under heat stress. The genotypes differed in tolerance to heat stress in different developmental stages.

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“…That is why it is necessary to adopt strategies for the evaluation and selection of eggplant genotypes tolerant to the effects caused by high temperatures. In this regard, the different genotype responses to the high temperatures are an indispensable factor for the development of more tolerant cultivars, as well as the knowledge about the inheritance of the traits involved in the tolerance to high temperatures is extremely important for breeding programs [7,8].…”

Section: Introductionmentioning

confidence: 99%

“…Similarly, selection based on the highest possible number of traits correlated with high temperatures tolerance constitutes an efficient strategy, since it reduces the probability of genes involved in tolerance to high temperatures being lost during the selective process based only on productivity [8].…”

Section: Introductionmentioning

confidence: 99%

Selection of Eggplant Genotypes Tolerant to High Temperatures

Valadares

Nóbrega

Moreira

et al. 2019

JEAI

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In the northeast of Brazil, the yield of eggplant has been unpredictable, especially when the flowering coincides with the hottest period of the year. The objective of this study was to evaluate eggplant genotypes for tolerance to high temperatures and to identify correlations between traits that aid the indirect selection of genotypes tolerant to high temperatures. Twenty-two genotypes were arranged in a randomized block design with four replications conducted in a greenhouse and in the open field, both located at the Universidade Federal Rural de Pernambuco, Recife, Pernambuco, Brazil, between December 2016 and May 2017. Positive correlations were obtained for the pairs, number of fruits per plant (NFP) x fruit fixation index (FFI), NFP x production per plant (PP) and PP x FFI and negative for the pair NFP x PP. The associations among the traits pollen viability (PV), FFI, NFP and PP were low and/or negative for all pairs in both environments and indicates that the indirect selection for FFI and PP through PV is not efficient. Higher values for PV, NFP, PP were observed in greenhouse cultivation, while in the field the genotypes had the best performance for fruit weight (FWe) FFI, fruit length (FL), fruit width (FWi) and length/width ratio of fruit (FLWR). In high temperature conditions, the genotypes CNPH 135, CNPH 93, CNPH 79, CNPH 84, CNPH 71, CNPH 71, CNPH 668, Ajimurasaki F1 and Kokushi Onaga F1 with good FFI and CNPH 135 with the highest FFI, PP, PV and PWe. The FFI in 45.4% of the genotypes under high temperatures was low, around 21.3 and 40.5%. In the field, genotypes CNPH 84 and CNPH 668 stood out with the best FFI (> 60%).

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Breeding for Heat-Stress Tolerance

Cited by 14 publications

References 31 publications

Plant tolerance to high temperature in a changing environment: scientific fundamentals and production of heat stress-tolerant crops

Plant tolerance to high temperature in a changing environment: scientific fundamentals and production of heat stress-tolerant crops

Characterization of heat tolerance in wheat cultivars and effects on production components

Selection of Eggplant Genotypes Tolerant to High Temperatures

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