甘肃省26个春小麦品种（系）苗期抗条锈基因分析及成株期抗病性评价

为明确甘肃省部分春小麦品种(系)苗期所含抗条锈基因,选用来自中国、印度等国家的24个具有不同毒性谱的条锈菌单孢菌系,分别接种于26个甘肃春小麦品种(系)及30个已知基因的载体品种上,进行苗期抗条锈病评价,并结合系谱分析推导苗期抗条锈基因.初步分析结果表明,银春8号等19个品种(系)含有Yr1及未知抗病基因,其余品种(系)含有未知抗病基因.成株期在甘肃陇南的田间抗条锈病评价结果显示,定西43可能具有成株抗病性,定E301、定9873、定鉴5、陇春26、陇春24、定西39、临麦30、宁9415具有慢条锈性.聚类分析与基因推导结果基本一致.

Postulation of Resistant Genes at Seedling Stage and Evaluation of Adult Resistance to Stripe Rust of 26 Spring Wheat Cultivars (Lines) from Gansu Province

Using artificial inoculation of 24 Puccinia striiformis isolates which come from China, India and other countries, with different virulence spectra of pathogenicity at seedling stage, the resistance to stripe rust was identified in 26 spring wheat cultivars (lines) from Gansu province, China, in combined with pedigree analysis of testing cultivars (lines), and resistant reactions of 30 standard wheat varieties with known resistant genes. The preliminary results showed that there were 19 cultivars (lines) including Yinchun 8, Ding E301, Ningchun 39, Ding 9873, Dingjian 5, Xihan 1, Wuchun 2, Huining 18, Zhangchun 23, Jiu 9996, Yinchun 6, Longchun 24, Yongliang 15, Dingxi 43, Dingxi 39, Ningchun 32, Ningchun 18, Linmai 30 and Ning 9415 carried Yr1 and unknown resistant genes. Other cultivars (lines) were controlled by unknown resistant genes. Although most cultivars (lines) tested were highly susceptible at seedling stage, some of them showed adult resistance in the observation pool in Longnan region, Gansu province, China. The wheat variety Dingxi 43 carried adult resistance and another 8 wheat cultivars (lines) including Ding E301, Ding 9873, Dingjian 5, Longchun 26, Longchun 24, Dingxi 39, Linmai 30, Ning 9415 might be cultivars with slow rusting characteristics. The results of cluster analysis indicated as the same as gene postulation.