Full
Outline
To clarify the resistance levels to powdery mildew and stripe rust, as well as the distribution patterns of resistance genes in wheat germplasm resources from Zhejiang Province, and to explore elite resistant resources suitable for the wheat-growing regions in the middle and lower reaches of the Yangtze River, this study performed seedling resistance identification on 241 wheat accessions from Zhejiang Province［177 landraces and 64 bred varieties(lines)］ using Blumeria graminis f. sp. tritici physiological race E09 and Puccinia striiformis f. sp. tritici physiological race CYR32. Molecular markers were used to analyze the composition of resistance genes. The results showed that among the 241 accessions, 57(23.65%) were resistant to powdery mildew, consisting of 51 bred varieties(lines) and 6 landraces; 66(27.39%) were resistant to stripe rust, including 24 bred varieties(lines) and 42 landraces; and 24(9.96%) showed resistance to both diseases, containing 22 bred varieties(lines) and 2 landraces. Molecular detection of seven powdery mildew resistance genes(Pm2, Pm4, Pm5e, Pm8, Pm21, Pm24, and Pm60) revealed that Pm4 and Pm21 had the highest detection rate, with 23 accessions carrying each gene, yet no target Pm genes were detected in 16 accessions. Among eight tested stripe rust resistance genes(Yr5, Yr9, Yr10, Yr15, Yr28, Yr30, Yr46, and YrZH84), Yr10 showed the highest detection rate with 23 carriers, all of which were landraces, yet 13 accessions(including 5 landraces) had no detectable target stripe rust resistance genes. Among the 24 accessions with dual resistance to powdery mildew and stripe rust, 12 carried both types of resistance genes, while Zhenongmai 7 and Zhe 21 were detected without any of the tested resistance genes. Agronomic trait analysis revealed that bred varieties(lines) had superior performance in plant height, thousand-kernel weight and other traits, which could be directly used as elite resistant donors for wheat disease resistant breeding. Based on the above results, both the wheat bred varieties(lines) and landraces in Zhejiang Province contain good resistance resources to powdery mildew and stripe rust. The resistance sources for powdery mildew and stripe rust are mainly concentrated in the bred varieties(lines) and landraces, respectively, ang show a clear differentiation characteristic.
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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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