关键词: 水稻, 种质资源, 抗瘟性, 农艺性状

Abstract: The agronomic traits,blast resistance and restoring or maintaining characteristics of 72 rice germplasm resources from Guangdong province were investigated and evaluated under the ecological conditions in Sichuan province.The results indicated that most of the 72 Guangdong rice resources were medium or late maturation,low plant height,strong tiller,medium or small panicle,low seed setting,low 1000-grain weight and low grain yield per plant.The 72 Guangdong resources might be divided into 3 groups by using cluster analysis based on agronomic traits.Group I had 20 resources,with mid-panicle,83.3% of the average seed setting.Group Ⅱ had 21 resources,with big panicle,about 180 average spikelets per panicle.Group Ⅲ had 31 resources,with small panicle,short growth period,low plant height.The identification of resistance to rice blast showed that 52 of the resources were resistant to rice blast,accounting for 72.2% of germplasm analysis,and the panicle neck blast was evaluated as 1~3 scales.Fengsizhan 1 and other 5 resources were highly resistant to rice blast,and the leaf blast were 1~2 scales and panicle neck blast of 1 scale.The utilization strategies of Guangdong rice germplasm resources in Sichuan province were discussed.

Key words: rice, germplasm resources, rice blast resistance, agronomic traits