Resistance Evaluation of Southern Japonica Rice Germplasm Against Sheath Blight in Field
Received date: 2025-12-11
Online published: 2026-05-11
Sheath blight is one of the three major diseases in rice, posing a serious threat to rice green sustainable production and high stable yield. As a primary staple crop, the safe production of japonica rice is of great significance to national food security. In this study, under field inoculation conditions, we evaluated the resistance to sheath blight in 255 japonica rice varieties and 35 indica rice varieties collected from different ecological regions of southern China. The results showed that the overall resistance level of the tested varieties was low, with 89.7% of them being moderately susceptible to susceptible. The resistance of indica rice varieties was generally superior to that of japonica varieties. Among the japonica varieties, those from Zhejiang Province exhibited higher resistance levels compared to those from Jiangsu and Anhui Provinces. In Jiangsu, late-maturing japonica types showed better resistance than medium-maturing and late-medium-maturing types. Correlation analysis revealed a significant negative relationship between sheath blight resistance and both heading date and plant height. Based on disease rating, heading date, and plant height, 14 moderately resistant japonica varieties with relatively good resistance were identified, providing valuable germplasm resources for breeding sheath blight-resistant japonica rice in southern China.
FANG Jianjiang, ZHANG Wenxuan, CHEN Qi, ZHAI Pengfei, XIONG Yixuan, YU Lingbo, CHEN Zihang, DONG Zhenzhong, FENG Zhiming, XIE Wenya, HU Keming, CHEN Zongxiang, ZUO Shimin . Resistance Evaluation of Southern Japonica Rice Germplasm Against Sheath Blight in Field[J]. China Rice, 2026 , 32(3) : 76 -80 . DOI: 10.3969/j.issn.1006-8082.2026.03.013
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