Abstract:

To screen new medium-maturing and medium-japonica herbicide-resistant rice varieties suitable for planting in Huaibei region of Jiangsu Province，this study conducted a field experiment at the experimental farm of Dongxin Branch of Jiangsu Agricultural Reclamation Development Co.，Ltd. in 2024. A comprehensive evaluation was carried out on the high-yielding potential，main agronomic traits，and field resistance of 17 tested varieties（including the control Huajing 5）. The results showed that Lianjing 166 had the highest yield，moderate growth duration，and good lodging resistance，indicating great potential for popularization and application. Runnong 17 ranked second in yield，with lower plant height，good lodging resistance，and shorter growth duration，offering certain flexibility in crop rotation arrangement. Runnong 802 had the lowest yield and poor lodging resistance，and was recommended to be eliminated or further tested. Future efforts should continue to focus on the stability and adaptability of herbicide-resistant rice varieties.

Key words: herbicide-resistant rice, variety screening, yield, growth period, resistance