Byamukama E, Seifers D L, Hein G L, De Wolf E, Tisserat N A, Langham M A C, Osborne L E, Timmerman A, Wegulo S N
Department of Plant Pathology, University of Nebraska-Lincoln, Lincoln 68583.
Kansas State University, Agricultural Research Center-Hays, Hays 67601.
Plant Dis. 2013 Jan;97(1):21-29. doi: 10.1094/PDIS-06-12-0535-RE.
Wheat curl mite (WCM)-transmitted viruses-namely, Wheat streak mosaic virus (WSMV), Triticum mosaic virus (TriMV), and the High Plains virus (HPV)-are three of the wheat-infecting viruses in the central Great Plains of the United States. TriMV is newly discovered and its prevalence and incidence are largely unknown. Field surveys were carried out in Colorado, Kansas, Nebraska, and South Dakota in spring and fall 2010 and 2011 to determine TriMV prevalence and incidence and the frequency of TriMV co-infection with WSMV or HPV in winter wheat. WSMV was the most prevalent and was detected in 83% of 185 season-counties (= s-counties), 73% of 420 season-fields (= s-fields), and 35% of 12,973 samples. TriMV was detected in 32, 6, and 6% of s-counties, s-fields, and samples, respectively. HPV was detected in 34, 15, and 4% of s-counties, s-fields, and samples, respectively. TriMV was detected in all four states. In all, 91% of TriMV-positive samples were co-infected with WSMV, whereas WSMV and HPV were mainly detected as single infections. The results from this study indicate that TriMV occurs in winter wheat predominantly as a double infection with WSMV, which will complicate breeding for resistance to WCM-transmitted viruses.
由小麦曲叶螨（WCM）传播的病毒，即小麦线条花叶病毒（WSMV）、小麦花叶病毒（TriMV）和高平原病毒（HPV），是美国大平原中部感染小麦的三种病毒。TriMV是新发现的，其流行程度和发病率在很大程度上尚不清楚。2010年和2011年春季及秋季，在科罗拉多州、堪萨斯州、内布拉斯加州和南达科他州开展了田间调查，以确定TriMV的流行程度和发病率，以及TriMV与WSMV或HPV在冬小麦中的共感染频率。WSMV最为普遍，在185个季节县（=s县）中的83%、420个季节田（=s田）中的73%以及12973个样本中的35%被检测到。TriMV分别在32%、6%和6%的s县、s田和样本中被检测到。HPV分别在34%、15%和4%的s县、s田和样本中被检测到。在所有四个州都检测到了TriMV。总体而言，91%的TriMV阳性样本与WSMV共感染，而WSMV和HPV主要作为单一感染被检测到。本研究结果表明，TriMV在冬小麦中主要以与WSMV的双重感染形式出现，这将使抗WCM传播病毒的育种工作复杂化。
