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Xinjiang is an independent epidemic region for wheat stripe rust in China. In recent years, the disease has shown a persistent and aggravated trend, posing a serious threat to grain production security. To investigate the distribution of stripe rust resistance genes and identify elite resistant genotypes in Xinjiang wheat germplasm resources, 188 wheat varieties (lines) cultivated in the Ili River Valley were evaluated for their resistance to the current predominant Puccinia striiformis f. sp. tritici physiological races (CYR32, CYR33, CYR34) and mixed inocula of Shuiyuan and Guinong pathogenic groups. Moreover, molecular detection was performed using 15 closely linked molecular markers for the following stripe rust resistance genes: Yr5, Yr10, Yr15, Yr17, Yr18, Yr26, Yr29, Yr30, Yr52, Yr65, Yr75, Yr78, Yr80, Yr82, and Yr86. The results revealed that, among the 188 wheat varieties (lines), 106 accessions (56.4%) exhibited moderate resistance or higher levels of resistance over two consecutive years, including 11 highly resistant accessions, indicating a generally high level of resistance in the tested materials. Molecular marker analysis showed that the numbers of accessions carrying the resistance genes Yr5, Yr10, Yr15, Yr17, Yr18, Yr26, Yr29, Yr30, Yr52, Yr65, Yr75, Yr78, Yr82, and Yr86 were 84 (44.7%), 149 (79.3%), 19 (10.1%), 106 (56.4%), 185 (98.4%), 181 (96.3%), 172 (91.5%), 76 (40.4%), 147 (78.2%), 107 (56.9%), 26 (13.8%), 60 (31.9%), 127 (67.6%), and 13 (6.9%), respectively. Among them, the number of materials that aggregated 3 to 12 resistence genes were 1 (0.5%), 3 (1.6%), 13 (6.9%), 21 (11.2%), 34 (18.1%), 58 (30.9%), 34 (18.1%), 16 (8.5%), 5 (2.7%) and 2 (1.1%) respectively. The Yr80 gene was not detected in any of the tested materials. In summary, 188 wheat varieties (lines) exhibited a high level of resistance to stripe rust. The 106 resistant germplasms screened can serve as resistance sources for breeding wheat resistant to stripe rust.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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