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HATRI news
3 Septembe r2021
Thisbook had published In Molecular Breeding for Rice Abiotic Stress Tolerance and Nutritional Quality, First Edition. Edited by Mohammad Anwar Hossain, Lutful Hassan, Khandakar Md. Iftekharuddaula, Arvind Kumar and Robert Henry. John Wiley & Sons Ltd. Published 2021 by John Wiley & Sons Ltd. Pp. 92-119.
Molecular Breeding for Improving Heat Stress Tolerance in Rice:Recent Progress and Future Perspectives
Bui Chi Buu(1), Cho Young-chan(2), Nguyen Thi Lang(1)
(1)High Agricultural Technology Research Institute for Mekong Delta (HATRI), Can Tho, Vietnam
(2)National Institute of Crop Science (NICS), RDA, Wanju 55365, Republic of Korea
Web: HATRI.org
This means that screening to find rice capable of surviving increased temperatures must be considered with spells of drought. ● The reproductive stage, especially the flowering stage, is the most sensitive stage to high temperature. If temperature over 35 ∘C at anthesis and lasting for more than one hour occurs, it will causes high spikelet-sterility, leading to serious yield losses. ● Research on the genetic mechanism of heat tolerance is getting more important to the utilization of heat-tolerant genes (HT) and the development of new HT rice varieties. ● Plant physiology-based heat-stress responses could be cited as (i) net photosynthesis rate with higher CO2 responsiveness, (ii) grain filling, (iii) seed dormancy breaking and seedling emergence, (iv) anthesis response via anther dehiscence and spikelet sterility, and (v) HNT response via source and sink dynamics. ● Genetic resource to promote heat stress tolerance is a diverse gene pool from wild rice species to indica cultivars. The genotypes, namely, N22 and Dular, which belong to the aus ecotype, were mostly exploited by rice breeders and geneticists. ● The QTLs located on chromosomes 1, 3, 4, 5, 7, 8, 9, and 10 were mostly studied, in particular on chromosome 3, 4, 5, and 9. Agronomical characteristics were often recognized as spikelet fertility and grain filling traits ● MAS can enhance the efficiency of breeding programs. The rate of success is likely to increase in gene-base marker development, with more efficient QTL mapping procedures and lower-cost genotyping systems. NGS and SNP genotyping promise to greatly accelerate rice improvement tolerant to heat stress. ● Proteomic studies in rice have provided evidence for better understanding the molecular mechanisms of thermal adaptation with HSPs expression. Further cooperation at international level must be encouraged. Linked with Book
