국립식량과학원 육성 벼 품종의 내풍성 특성 분석
Characterization of Wind-Tolerant Rice Varieties Bred at the National Institute of Crop Science
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The damage caused by typhoons to rice production has been increasing. To reduce this damage, wind-tolerant rice breeding programshave been conducted at the Yeongdeok substation (YS) of the National Institute of Crop Science (NICS). This study was conducted to examinethe effects of these wind-tolerant rice breeding programs. Under the wind-tolerance screening facility (WTSF), the wind-tolerance of 17 ricevarieties bred at NICS (usual rice) and 20 rice varieties bred at YS (wind-tolerant rice) were analyzed by evaluating six traits: white spikelet(WS), white panicle (WP), degree of wind damage (DG), ratio of ripened grain (RRG) at control (RRG_C) and treatment (RRG_T), andreduction rate of RRG between control and treatment (RRG_R). Wind-tolerant rice showed more wind-tolerant characteristics than usual rice,such as lower WS, WP, DG, and RRG_R and higher RRG_T and RRG_C. In the principal component analysis, wind-tolerant rice showinga similar direction for RRG_T and RRG_C were located separately from the usual rice. The adaptability tests of wind-tolerant rice wereconducted by evaluating eight yield-related traits in the wind-prone areas. Wind-tolerant rice was divided into three clusters by K-means clusteringanalysis using WP and RRG_T with the WTSF, RRG, and yield in the wind-prone areas. Among the three clusters, YC2 had the strongestwind tolerance performance, followed by YC3 showing moderate wind tolerance, and YC1 the weakest wind tolerance. ‘Sinbo’, a varietybelonging to YC2, exhibited the strongest wind tolerance and high yield potential among all varieties. The wind-tolerant rice varieties bredat YS could be used practically to prevent wind damage and utilize breeding materials to enhance the wind tolerance of rice varieties.
Abstract
The damage caused by typhoons to rice production has been increasing. To reduce this damage, wind-tolerant rice breeding programshave been conducted at the Yeongdeok substation (YS) of the National Institute of Crop Science (NICS). This study was conducted to examinethe effects of these wind-tolerant rice breeding programs. Under the wind-tolerance screening facility (WTSF), the wind-tolerance of 17 ricevarieties bred at NICS (usual rice) and 20 rice varieties bred at YS (wind-tolerant rice) were analyzed by evaluating six traits: white spikelet(WS), white panicle (WP), degree of wind damage (DG), ratio of ripened grain (RRG) at control (RRG_C) and treatment (RRG_T), andreduction rate of RRG between control and treatment (RRG_R). Wind-tolerant rice showed more wind-tolerant characteristics than usual rice,such as lower WS, WP, DG, and RRG_R and higher RRG_T and RRG_C. In the principal component analysis, wind-tolerant rice showinga similar direction for RRG_T and RRG_C were located separately from the usual rice. The adaptability tests of wind-tolerant rice wereconducted by evaluating eight yield-related traits in the wind-prone areas. Wind-tolerant rice was divided into three clusters by K-means clusteringanalysis using WP and RRG_T with the WTSF, RRG, and yield in the wind-prone areas. Among the three clusters, YC2 had the strongestwind tolerance performance, followed by YC3 showing moderate wind tolerance, and YC1 the weakest wind tolerance. ‘Sinbo’, a varietybelonging to YC2, exhibited the strongest wind tolerance and high yield potential among all varieties. The wind-tolerant rice varieties bredat YS could be used practically to prevent wind damage and utilize breeding materials to enhance the wind tolerance of rice varieties.
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