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Outline
To accurately evaluate the resistance of wheat varieties in Huanghuai wheat area to the current circulating wheat stripe rust races, and to understand the disease resistance genes in the high-generation lines and their distribution in the wheat area, a total of 194 high-generation wheat lines from Hebei, Henan, Shandong and Anhui Provinces were collected from 2022 to 2023. CYR34 was used to identify the resistance of stripe rust fungus at seedling stage. Mixed races (CYR32, CYR33, and CYR34), artificial inoculation nurseries (Yangling, Shaanxi, YL) and natural disease nurseries (Jiangyou, Sichuan, JY) were set up to identify the resistance at the adult plant stage. Seventeen SNP markers of the 14 known disease resistance genes were used for molecular detection, and the genes that may be contained in the wheat lines were speculated. The result showed that 149 (76.40%) of the materials showed resistance to CYR34 at seedling stage. For the results of adult plant identification, 137 (70.62%) materials showed resistance in YL; 174 (86.60%) materials showed resistance in JY, and 124 materials (63.92%) showed disease resistance in both YL and JY environments. The results of molecular marker detection showed that the disease resistance genes carried in the lines were Yr6, Yr7, Yr9, YrZH84, YrSP, YrAS1676, Yr29, Yr30, Yr78, Yr86, and YrLT26, among which Yr6, Yr9, YrZH84, Yr30, and YrLT26 had a significant effect on the disease resistance of the lines, yet no materials containing Yr18 or Yr85 were detected in the lines. The combination of Yr7+Yr29+Yr9, Yr7+Yr29+YrZH84,Yr7+Yr29+YrZH84+YrSP,Yr7+Yr29+Yr9+YrZH84+YrSP and other resistance genes had good disease resistance in the field, which could be used as a reference in the breeding process. Compared with the results of stripe rust resistance in the wheat area in the past ten years, the resistance of wheat lines in the northern Huanghuai area was significantly enhanced, with 63.92% of the lines showing resistance. The level of disease resistance breeding still needs to be improved.
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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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