Yang Hong, Awais Muhammad, Deng Feifei, Li Li, Ma Jinbiao, Li Guangkuo, Li Kemei, Gao Haifeng
College of Agriculture, Xinjiang Agricultural University, 311 Nongda East Road, Urumqi 830052, China.
Institute of Plant Protection, Xinjiang Academy of Agricultural Sciences/Key Laboratory of Integrated Pest Management on Crop in Northwestern Oasis, Ministry of Agriculture and Rural Affairs, Urumqi 830000, China.
J Fungi (Basel). 2024 Dec 14;10(12):870. doi: 10.3390/jof10120870.
Xinjiang is an important region due to its unique epidemic characteristics of wheat stripe rust disease caused by f. sp. . Some previous studies on race identification were conducted in this region, but it is still unclear how temporal changes affect the dynamics, diversity, and virulence characteristics of races in Xinjiang. To gain a better understanding, we compared the race data from spring and winter wheat crops of 2022 with that of 2021. Our results showed a significant change in virulence frequency in 2022. , , and exhibited an increasing trend, with a frequency of ≥18%, while the maximum decline was observed in , , and , with a frequency of ≤-25%. It was found that and remained effective against Xinjiang races. The race diversity increased from 0.92 (70 races out of 345 isolates) to 0.94 (90 races out of 354 isolates) in 2022, with being the dominant race group. Race became prevalent in the region in 2022, while the grouped was wiped out in 2022, from both summer and winter crop seasons. and groups showed an overall declining trend. Overall prevalent races showed over-summering and over-wintering behaviors in Xinjiang. The number of new races occurrence frequency increased by 34% in 2022, indicating a potential change in the population structure of . It is crucial to introduce newly resistant gene cultivars in this region and to establish rust-monitoring protocols to prepare for any future epidemics.
新疆是一个重要地区，因其小麦条锈病由特定菌系引起具有独特的流行特征。此前在该地区开展了一些关于小种鉴定的研究，但仍不清楚时间变化如何影响新疆小种的动态、多样性和毒力特征。为了更好地了解，我们将2022年春小麦和冬小麦作物的小种数据与2021年的数据进行了比较。我们的结果显示2022年毒力频率发生了显著变化。[具体菌系名称1]、[具体菌系名称2]和[具体菌系名称3]呈上升趋势，频率≥18%，而[具体菌系名称4]、[具体菌系名称5]和[具体菌系名称6]下降最为明显，频率≤ -25%。发现[具体抗性品种1]和[具体抗性品种2]对新疆小种仍然有效。2022年小种多样性从0.92（345个分离株中的70个小种）增加到0.94（354个分离株中的90个小种），[优势小种名称]是优势小种组。[具体小种名称]在2022年在该地区变得普遍，而[具体小种组合名称]在2022年从夏作和冬作季节中消失。[具体小种组名称1]和[具体小种组名称2]总体呈下降趋势。总体流行小种在新疆表现出越夏和越冬行为。2022年新小种出现频率的数量增加了34%，表明[病原菌名称]的种群结构可能发生了变化。在该地区引入新的抗性基因品种并建立锈病监测方案以应对未来可能的疫情至关重要。
