关键词: 水稻, 种质资源, 稻瘟病, 抗性, 恢复性, 保持性

Abstract: Screening and utilization of rice blast resistant germplasm resources are the important foundation for breeding resistance varieties. The blast resistance and main agronomic traits and restoring or remaining characteristics of 97 rice germplasm resources were evaluated systematically. The results showed that these 97 rice germplasm resources had high or middle resistance to blast and their main agronomic traits were significantly different with the period of 99-132 d from sowing to heading，89.6-149.2 cm in plant height，4.0-13.1 effective panicles per plant, 18.50-42.50 g per 1000-grain weight, 97-268 spikelets per panicle, 45.83%-93.90% of seed setting percentage, 15.28-32.58 g grain yield per plant. This indicated that they had highly genetic diversity. Among them, 37 germplasm resources had restoring character to male-infertile lines and 9 germplasm resources had maintaining character to male-infertile lines. It had an important value for breeding new restorer lines resistant to blast and new male-infertile lines resistant to blast and new high-yield hybrid rice combinations resistant to blast.

Key words: Rice, Germplasm resources, Rice blast, Resistance, Restoring character, Maintaining character