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-  2018 

Identification of the resistance of 104 wheat varieties to stripe rust and analysis of their genetic diversity

DOI: 10.13802/j.cnki.zwbhxb.2018.2017193

Keywords: 小麦条锈病 育成品种 农家品种 SSR 遗传多样性分析
wheat stripe rust productive cultivar landrace SSR genetic diversity analysis

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In order to investigate the resistance of 104 different wheat varieties to stripe rust, including 73 landraces and 31 productive cultivars, the rust-resistance was identified in seedlings with inoculating CYR32 and CYR34, and their genetic diversity was analyzed with SSR molecular markers. The results showed that five landraces(Baidatou, Hongyanglazi, Laolanmai, Hongjiantiao, Zhuyeqing(white)) and two productive cultivars(Pindong 904054-6 and Pindong 904024) were near immunity to CYR32, and two landraces(Baimangmai and Laolanmai) and two productive cultivars(Pindong 904024 and Jin 79K214) were near immunity to CYR34. In comparison, the resistance level of the landraces to CYR32 was higher than that of the productive cultivars, while the resistance level of the productive cultivars to CYR34 was higher than that of the landraces. The results of genetic diversity analysis showed that the variation of genetic similarity coefficient among 104 wheat varieties was 0.32-0.98, with an average of 0.65. However, there was no significant difference in the genetic similarity coefficients between different regions. It was found by cluster analysis that the genetic relationships of the landraces were not correlated with their regions, while those of the productive cultivars were closely related to the region. Therefore, the high-quality parents from different groups should be applied in the process of breed improvement, which can broaden the genetic basis of wheat breeding, make full use of high-quality wild resources and breed more excellent wheat varieties.


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