Abstract:

In order to select the hybrid indica rice varieties with high and stable yield, strong disease resistance and good grain quality for planting at the indica rice planting region in Yunnan, and accelerate the breeding process and achievement transformation, using ‘Lingheyou 78’ as the control, the yield, field performance, resistance and rice quality of 8 hybrid indica rice varieties were compared and analyzed through the variety testing. The results showed that, except for ‘Yunliangyou 252’, other varieties had excellent comprehensive characters, and the average yield of regional test in 2021 and 2022 was more than 10,000 kg/hm². There were 5 varieties with a 5% increase compared with CK, and the yields of 8 varieties in production test were more than 9800 kg/hm², among which ‘Yunliangyou 9801’had the highest yield, and the increase was more than 8.8% compared with CK. Through the analysis of rice quality, ‘Yunliangyou 2198’ met the general quality standard of edible rice varieties of the Ministry of Agriculture and Rural Affairs. The rice quality of ‘Yunliangyou 42’, ‘Yunliangyou 9801’, ‘Yunliangyou 9802’, ‘Yunliangyou 9803’, ‘Yulongyouhezhan’ and ‘Huazhongyou 9326’ in two years all reached the high quality standard of edible rice varieties of the Ministry of Agriculture and Rural Affairs. The output of ‘Yunliangyou 252’ was 9730.95 kg/hm², lower than CK, and its rice quality was the general quality standard of edible rice varieties of the Ministry of Agriculture and Rural Affairs. Therefore, six varieties, ‘Yunliangyou 42’, ‘Yunliangyou 9801’, ‘Yunliangyou 9802 ’, ‘Yunliangyou 9803’, ‘Yulongyouhezhan’ and ‘Huazhongyou 9326’, are considered as high-quality varieties. ‘Yunliangyou 2198’ is a variety with high and stable yield. The above 7 varieties are recommended for approval, and the research results provide the basis for rice variety approval and rice yield increase.

Key words: rice, hybrid rice, regional test, production test, yield, disease resistance, rice quality