Chinese Journal of Nature ›› 2022, Vol. 44 ›› Issue (5): 339-356.doi: 10.3969/j.issn.0253-9608.2022.03.010

• Review Article • Previous Articles     Next Articles

Differentiation of lowland-upland rice and development of water-saving and drought-resistance rice

LUO Lijun   

  1. Key Laboratory of Grain Crop Genetic Resources Evaluation and Utilization, Ministry of Agriculture and Rural Affairs, Shanghai Agrobiological Gene Center, Shanghai 201106, China
  • Received:2022-04-10 Online:2022-10-25 Published:2022-07-18

Abstract: The lowland and upland rice are two ecotypes to adapt to contrasting soil water status during the evolution from the wild rice to cultivated rice. The upland rice is domesticated before rice and is long subjected to bidirectional selection on yield potential and drought resistance. The water-saving and drought-resistance rice (WDR) is developed by integrating the both high yield potential and acceptable grain quality as current lowland paddy rice, as well as water-saving and drought-resistance as traditional upland rice. It has higher water use efficiency and stronger drought-resistance, and could be planted in paddy field by dry seeding with aerobic cultivation, and upland rainfed and hillside land. The WDR production can greatly save irrigation water, reduce non-point source pollution and methane emission, and reduce labor inputs.

Key words: differentiation of lowland-upland rice, water-saving and drought-resistance rice, water use efficiency, drought , resistance, value-add breeding