Department of Agricultural Biology, Colorado State University, 307 University Ave, Fort Collins, CO 80523, United States.
Department of Soil and Crop Sciences, Colorado State University, 307 University Ave, Fort Collins, CO 80523, United States.
Curr Opin Insect Sci. 2021 Jun;45:21-27. doi: 10.1016/j.cois.2020.11.003. Epub 2020 Nov 26.
Wheat curl mite (WCM) is the only known arthropod vector of four wheat viruses, the most important of which is Wheat streak mosaic virus (WSMV). Host resistance to WCM and WSMV is limited to a small number of loci, most of which are introgressed from wild relatives and are often associated with linkage drag and temperature sensitivity. Reports of virulent WCM populations and potential resistance-breaking WSMV isolates highlight the need for more diverse sources of resistance. Genome sequencing will be critical to fully characterize the genetic diversity in WCM and WSMV populations to better understand the incidence of WCM-transmitted viruses and to evaluate the potential stability of resistance genes. Characterizing host resistance genes will help build a mechanistic understanding of wheat-WCM-WSMV interactions and inform strategies to identify and engineer more durable resistance sources.
小麦卷曲叶螨（WCM）是四种小麦病毒的唯一已知节肢动物载体，其中最重要的是小麦线条花叶病毒（WSMV）。对 WCM 和 WSMV 的寄主抗性仅限于少数几个基因座，其中大多数是从野生亲缘种中导入的，并且通常与连锁累赘和温度敏感性有关。关于毒力强的 WCM 种群和潜在的抗药性 WSMV 分离株的报道强调了需要更多具有抗性的来源。基因组测序对于充分描述 WCM 和 WSMV 种群的遗传多样性至关重要，以便更好地了解 WCM 传播病毒的发生率，并评估抗性基因的潜在稳定性。描述寄主抗性基因将有助于建立对小麦-叶螨-WSMV 相互作用的机制理解，并为确定和设计更持久的抗性来源提供信息。
