论文部分内容阅读
1992年在全国15个省、市、自治区32个点的72个品种上,采集小麦秆锈病标样105份,从中分离到256个菌株,鉴定出21C3、34C2和34 3个生理小种,包括21C3—CKH、21C3—CKR、34C2—MKH、34C2—MKR、34C2—MKK、34C2—MFK、34-MKG、34-MKR和34-MFR9个致病类型。生理小种21C3出现频率居首位为85.2％,其中21C3-CKR为50.4％、21C3-CKH为34.8％。利用256个菌株对42个SR单基因系进行了毒为频律测定,其中SR5、10、15、26、30、31、33、35、37和38的毒力频率为2％-22％;SR22、SR22、23、24、32、GT和Wd-1的毒力频率为22％-50％;SR12、13、14、18、19、27、28、和29为50％-80％,而SR9e、11、21无毒力。
In 1992, 105 rust samples of wheat stem rust were collected from 72 cultivars at 32 points in 15 provinces, cities and autonomous regions of China. 256 strains of wheat rust isolates were isolated and 21C3, 34C2 and 34 physiological races were identified including 21C3-CKH, 21C3-CKR, 34C2-MKH, 34C2-MKR, 34C2-MKK, 34C2-MFK, 34-MKG, 34-MKR and 34-MFR. The frequency of physiological races 21C3 was 85.2%, of which 21C3-CKR was 50.4% and 21C3-CKH was 34.8%. Twenty - four strains of SR single - gene lines were tested for toxicity by using 256 strains of strains. The virulent frequencies of SR5, 10, 15, 26, 30, 31, 33, 35, 37 and 38 were 2% -22% The frequency of virulence of SR22, SR22, 23, 24, 32, GT and Wd-1 was 22% -50%; SR12, 13, 14, 18, 19, 27, 28 and 29 were 50% -80% SR9e, 11,21 non-toxic.