Abstract:

In order to select suitable varieties of regenerated rice for planting in Changsha Region, 16 hybrid rice varieties (combinations) that have been approved in recent years were used as materials,and Y Liangyou 911 (CK) was used as the control to conduct adaptability experiments on regenerated rice yield, growth period, and other important traits. Scientific evaluation was conducted based on plant type, growth period, yield and yield composition, and other important performance indicators. The results showed that the top three varieties in terms of annual yield among the tested varieties were Gongliangyou Yue Nongsi Miao, Hengfeng You Yue Nongsi Miao, and Yangtaiyou 5009, with an average yield of 853.9-869.9 kg per 667 m², which wais 7.49%-9.50% higher than Y Liangyou 911 (CK). Gongliangyou Yue Nongsi Miao, Hengfengyou Yue Nongsi Miao, and Yangtaiyou 5009 have excellent comprehensive characteristics, which are more suitable for promotion and planting in the Changsha Region.

Key words: regenerated rice, variety screening, growth period, yield of first season, yield of regeneration season, annual yield