Shikai Hu , Hongjian Tao , Qian Qian , Longbiao Guo

State Key Laboratory of Rice Biology, China National Rice Research Institute, Hangzhou, 310006, P. R. China
Author    Correspondence author
Rice Genomics and Genetics, 2012, Vol. 3, No. 7   doi: 10.5376/rgg.2012.03.0007
Received: 21 May, 2012    Accepted: 27 Jun., 2012    Published: 29 Jun., 2012

This article was first published in Molecular Plant Breeding (2010, Vol.8, No.4, 629-640) in Chinese, and here was authorized to translate and publish the paper in English under the terms of Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Hu et al., 2012, Genetics and Molecular Breeding for Salt-Tolerance in Rice, Vol.3, No.7 39-38 (doi: 10.5376/rgg.2012.03.0007)

Salt stress is one of the main environmental constraints for the losses of rice yield. In this paper, we introduced the mechanisms of rice salt-tolerance by the following three aspects: the integrity of membrane systems, ionic compartmentation, and osmotic adjustment. We also briefly presented the three methods for identifying rice salt-tolerance, which specifically refer to biological and agronomic salt resistance, as well as the response of in vitro cells to salt stress. Then we summarized the progresses of mining salt-resistance rice germplasm resources, mapping the QTLs conferring salt-tolerance, cloning slat-tolerant genes of importance and breeding salt-tolerant rice varieties. Through a long-term evaluation of this trait, some rice germplasm involved in salt tolerance have been identified. More than 70 QTLs controlling the salt-related traits of Na⁺/K⁺ contents and survival days in rice have been identified. Two salt-tolerance genes SKC1 and DST have been cloned. A series of transgenic lines with salt-tolerance and polymerization lines of two salt-resistant genes (SKC1 and BADH) in rice have been developed in our lab. Finally, we discussed the prospects of rice salt-tolerant mechanism research and their applications in practice, which might provide an important reference for further studies of salt-tolerance in rice.

Rice; Salt-tolerance; Germplasm; QTL; Genetics and breeding