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:对引自美国的水稻纹枯病抗源进行了 2年的田间接种试验和 1年的田间性状考察。结果显示 ,抗源与感病对照以及抗源间 ,在抗性水平上存在极显著的差异 ,且品种与年份间的互作不显著 ,抗性与株型性状及生育期的相关也不显著 ,表明抗性是一个真实存在的遗传性状。多数抗源在中美两地的抗性表现大体一致 ,且多数引进抗源为半矮秆品种 (系 )或推广品种 ,具有较好的农艺性状和经济性状 ,较易为育种家所利用
: Two years of field inoculation test and one-year field investigation of resistance to rice sheath blight in the United States were conducted. The results showed that there were extremely significant differences in the resistance level between the resistant and susceptible controls and the resistant sources, and the interaction between the cultivars and the years was insignificant, and the correlation between resistance and plant type traits and growth period was not significant , Indicating that resistance is a real genetic trait. Most of the resistance sources showed broadly consistent resistance in China and the United States, and most of them introduced semi-dwarf varieties (lines) or promoted varieties with good agronomic and economic traits, which were easier for breeders to utilize