| Dezhongyou 341 is a Brassica napus hybrid rapeseed variety bred by crossing the self-fertile cytoplasmic male sterile line D1A and restorer line D2R. The variety was evaluated in multi-location regional experiments of winter rapeseed in the upper reaches of the Yangtze River (Shaanxi, Sichuan, and Chongqing) from 2016 to 2018, average yield per 667 m2 was 212.43 kg, which was 7.85% higher than the control variety Rongyou 18. From 2017–2019, the variety participated in the regional experiment in the middle reaches of the Yangtze River (Hubei, Hunan, Jiangxi) and the lower reaches of the Yangtze River (Anhui, Jiangsu, Zhejiang) for two consecutive years. The two-year average yields per 667 m2 in the middle and lower reaches were 203.17 kg and 210.26 kg, respectively, exceeding the yields of Huazayou 12 by 11.47% and Qinyou No.10 by 8.97%. In the experiment of the Yangtze River Basin, the variety showed obvious advantages in yield, oil content, quality and ripening period.The variety demonstrates broad adaptability, moderate resistance to sclerotinia and viral diseases, and lodging resistance. In 2019, it obtained the variety registration certificate of the Ministry of Agriculture and Rural Affairs of China, registration number(Registration No.: GPD rape \[2019\]610170).This study details the breeding methodology, biological characteristics, yield performance, key agronomic practices, and suitable areas for cultivation, thereby providing theoretical justification and practical guidance for its widespread application in the Yangtze River basin. |
