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- Title
Genetic Improvement of Heat Stress Tolerance in Cereal Crops.
- Authors
Hill, Camilla Beate; Li, Chengdao
- Abstract
Crop heat stress is a threat to food supply, with heatwaves expected to increase in frequency and intensity globally. In addition to yield loss, heat stress dramatically reduces fertility and seed-setting rate, grain quality and weight, and seed germination and growth. Genetic variability for heat stress tolerance can be used in breeding programs to develop tolerant genotypes. The availability of genome assemblies with high-confidence sequences for many cereal crops, including rice, maize, wheat and barley, now allows the identification of heat stress tolerance-associated genes and gene networks. This review focuses on synthesizing current advances in understanding the detrimental effects of heat stress on cereal crop production at the physiological and genetic levels. It provides an account of available genomic resources, genetic variation, candidate genes, and molecular markers for heat stress tolerance. Lastly, this review offers insight into crop genetic improvement for heat stress tolerance, including germplasm screening in glasshouse and field trials, marker-assisted selection, mapping genomic loci and identification of candidate genes, and genomic-assisted breeding.
- Subjects
FOOD supply; AGRICULTURAL productivity; CROPS; GENETIC variation; CROP improvement; CEREALS as food; BARLEY
- Publication
Agronomy, 2022, Vol 12, Issue 5, p1205
- ISSN
2073-4395
- Publication type
Article
- DOI
10.3390/agronomy12051205