四川部分杂交稻组合在广西稻瘟病圃的抗性表现

【目的】明确56份来自四川的杂交稻组合对广西稻瘟病的抗性，为合理引进、布局新品种及综合防治稻瘟病提供科学依据。【方法】在广西岑溪稻瘟病自然诱发鉴定圃对来自四川的56份杂交水稻组合进行稻瘟病田间自然诱发抗性鉴定。【结果】参试组合中，对广西稻瘟病表现中感的组合3份，分别是中优177、川香3号、辐优838，占鉴定总数的5．36％；表现感病水平的组合13份，占鉴定总数的23．21％；其余40份均表现高感稻瘟病，占鉴定总数的71．43％。【结论】56份杂交稻组合对广西稻瘟病均表现不同程度的感病，且大部分达高感水平，这些组合只适宜在非病区引进种植。

Rice blast resistance identification in some hybrid rice Combinations from Sichnuan in Guangxi disease nursery

Objective] The objective of the cmTent study was to evaluate fifty-six hybrid rice combinations from Sichuan for blast resistance. Method] Fifty-six hybrid rice combinations were evaluated for their resistance to rice blast using natural inoculation methods in disease nursery of Cenxi City, Guangxi （China）. Result] The results indicated that three combinations, viz., Zhongyou 177, Chuanxiang 3, Fuyou 838, showed moderate susceptibility, which occupied 5.36%; 13 combinations with the proportion of 23.21% showed susceptibility; and other 40 combinations with the proportion of 71.43% showed high susceptibility to rice blast. Conclusion] All the combinations in the test showed different degrees of susceptibility to rice blast, most of them were highly susceptible and may be introduced and planted in disease free areas of Guangxi.