期刊
PLANT PRODUCTION SCIENCE
卷 19, 期 1, 页码 12-21出版社
TAYLOR & FRANCIS LTD
DOI: 10.1080/1343943X.2015.1128113
关键词
Genetic analyses; grain quality; heat stress; marker-assisted breeding; Oryza sativa L; rice; spikelet sterility
类别
资金
- Japanese government (IRRI-Japan Collaborative Research Project)
- Cereal Systems Initiative for South Asia (CSISA) project (through the Bill & Melinda Gates Foundation)
- National Agricultural and Food Research Organization (Japan)
- KAKENHI [15K18625]
- Ministry of Agriculture, Forestry and Fisheries of Japan [Development of mitigation and adaptation techniques to global warming in the sectors of agriculture, forestry, and fisheries] [1202]
Global warming is predicted to aggravate the risk of unstable crop production. It is of great concern that damage to rice spikelet sterility and grain quality will increase, resulting in yield and economic losses. To secure the global food supply and farmers' income, the development of rice cultivars with heat resilience is a pressing concern. Regarding spikelet sterility, rice cultivars with heat tolerance at different growth stages have been identified in recent years. The early-morning flowering (EMF) trait is effective in heat escape because it shifts the time of day of flowering to earlier in the morning when it is cooler. Although varietal differences are very small, there are some genetic resources for EMF in wild rice accessions. Regarding heat-induced grain chalkiness, heat-tolerant Japonica-type cultivars for mitigating white-back type of chalky grains (WBCG) were found. Quantitative trait loci for heat tolerance at flowering, EMF, and for WBCG in grain quality have been mapped on the rice chromosomes. Further genetic efforts have been successfully connected to the development of near-isogenic lines for each trait with tagged molecular markers. These breeding materials are quite unique and useful in facilitating marker-assisted breeding toward the development of heat-resilient rice in terms of spikelet sterility and grain quality.
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