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Journal of Agriculture ›› 2025, Vol. 15 ›› Issue (12): 8-14.doi: 10.11923/j.issn.2095-4050.cjas2024-0165

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Two New Varieties of High-quality Soft Rice: Field Experiment on Disease Resistance and High Yield

YANG Rongjiao1,2(), WANG Bai1,2, WANG Baichang1,2, ZHANG Bisheng1,2, LI Xuemei3, XIA Zaixing1,2, YU Xuanli1,2(), CHEN Yixiang1,2()   

  1. 1 Dehong Agricultural Technology Promotion Center of Yunnan Province, Mangshi, Yunnan 678400
    2 Dehong Agricultural Sciences Research Institute of Yunnan Province, Mangshi, Yunnan 678400
    3 Dehong Plant Protection and Quarantine Station of Yunnan Province, Mangshi, Yunnan 678400
  • Received:2024-08-16 Revised:2024-11-26 Online:2025-12-20 Published:2025-12-16

Abstract:

In this study, with 'Hongyou 7' as the control, the field agronomic traits, disease-resistance performance, yield traits and rice quality of the new varieties 'Dedao 1' and 'Dedao 3' were compared to provide a scientific basis for the popularization and application of soft rice varieties in Yunnan. The results showed that the growth period of 'Dedao 1' (151 days) was the longest, followed by that of 'Hongyou 7' (145 days), and the growth period of 'Dedao 3' (136 days) was the shortest. There was no significant difference in plant height among the three varieties, and the occurrence of field diseases was generally mild. Among them, the disease indices of panicle neck blast, bacterial blight and sheath blight of 'Dedao 1' and 'Dedao 3' were significantly lower than those of 'Hongyou 7'. The panicle length, total number of grains per panicle, number of filled grains per panicle, seed-setting rate and 1000-grain weight of 'Dedao 1' and 'Dedao 3' were higher than those of 'Hongyou 7', and their average yields were 15.54% and 6.89% higher than that of 'Hongyou 7' respectively. The cooking quality of 'Dedao 1' and 'Dedao 3' was better than that of 'Hongyou 7'. Compared with 'Hongyou 7', the new varieties 'Dedao 1' and 'Dedao 3' have outstanding comprehensive performance and good adaptability, and can be further demonstrated, popularized and planted in the soft-rice production areas of Yunnan.

Key words: rice, high-quality soft rice, agronomic trait, disease resistance, high yield, adaptability, Yunnan