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近几年来,我国秆锈小种群发生了显著的变化。从1973年全国情况看,秆锈小种群的百分率:21号小种群占95.2％,34号小种群占4.7％;秆锈生理小种21C_3在全国是主要的,占75.8％,21C_1仅占0.5％,34占2.5％,34C_1占1.7％。到1977年,21号小种群占67.9％,仍为主要类群,其中21C_3占菌株总数的53.5％,与以前的趋势相似,但34号小种群迅速上升,已占32.1％,这是以前没有过的;21C_2小种明显下降,而新出现的小种类型34C_3跃居第二位,占16.2％,34C_3有87.5％菌株是感染欧柔血统品种的。
In recent years, China’s stalk rust population has undergone significant changes. From the national situation in 1973, the percentage of small stalk rust population was 95.2% for small population 21 and 4.7% for small population 34, while that of physiological stalk 21C_3 was 75.8%, while that of 21C_1 was only 0.5% %, 34 2.5%, 34C_1 1.7%. By 1977, the number of small population No. 21 accounted for 67.9% of the total, with 21C_3 accounting for 53.5% of the total number of isolates. Similar to the previous trend, small population No. 34 increased rapidly and accounted for 32.1% ; The 21C_2 races decreased significantly, while the newly emerged races 34C_3 leaped to second place, accounting for 16.2% and 87.5% of 34C_3, respectively.