对1991年全省7个麦区414份小麦条锈菌样进行了分析,共监测出39个小种及致病类型,其中能够明确归类的有20个计320份,占77.3％,有致病性差异的19个94份,占22.7％、暂编为甘90-2至甘90-20等。小种变化总趋势与1990年一致,不同之处是:洛13致病类群虽占优势,但总频率明显降低,29号仍居第1位,洛10类群测基本保持稳定;另一主要变化特点是老小种上升剧烈,两类群正处于强烈分化阶段。各地区间条锈菌系存在差异,天水易变区小种类型要比靠近陇南的甘南、兰州、平凉的复杂得多,而河西、庆阳两地区则以老小种为主。 A total of 414 wheat stripe rust cultivars from 7 districts in 1991 were analyzed. A total of 39 races and pathogenic types were detected. Among them, 320 were classified as 320 or 77.3% Ninety-nine were pathogenic differences, accounting for 22.7%, tentatively compiled as Gan 90-2 to Gan 90-20. The general tendency of races varied in line with 1990, with the difference being that while the dominant disease population of L013 was dominant, the total frequency was significantly lower, with No. 29 still ranking No.1, and population of L10 was basically stable. The other major change The characteristic is that the old race has risen sharply, and the two groups are in a period of intense differentiation. There were differences in the stripe rust strains in different regions. The smaller species in the mutable region of Tianshui were much more complex than those in Gannan, Lanzhou and Pingliang in Longnan, while the Hexi and Qingyang regions were dominated by old and small ones.