Seifers D L, Martin T J, Harvey T L, Haber S
Professor.
Professor, Kansas State University Agricultural Research Center-Hays, Hays 67601.
Plant Dis. 2007 Aug;91(8):1029-1033. doi: 10.1094/PDIS-91-8-1029.
Wheat streak mosaic virus (WSMV) infection reduces seed yield and quality in wheat. These losses can be alleviated significantly by exploiting genetic host plant resistance. A new source of temperature-sensitive resistance to WSMV, KS03HW12, and its parental lines (KS97HW29/ KS97HW131//KS96HW100-5) were evaluated in both greenhouse and field conditions. Parental wheat lines were exposed to WSMV pressure under different temperatures in growth chambers to determine the stability of the resistance, and 2 years of field yield trials were conducted to confirm effectiveness. To determine the effectiveness of its resistance against a spectrum of isolates, KS03HW12 was tested against six different WSMV isolates of different geographic origins. Among the three pedigree parents, only one, KS97HW29, was resistant. The parental lines of KS97HW29 are not available for testing; therefore, the presumed origin of the resistance could not be further confirmed. None of the six tested WSMV isolates systemically infected KS03HW12 at 18°C. Yield of KS03HW12 in field tests was not different from healthy controls. Thus, the elite winter wheat KS03HW12 appears to be a stable and effective source of temperature-sensitive resistance to WSMV and should be useful for wheat breeding programs.
小麦线条花叶病毒（WSMV）感染会降低小麦的种子产量和质量。利用寄主植物的遗传抗性可显著减轻这些损失。在温室和田间条件下对一种新的对WSMV具有温度敏感抗性的来源KS03HW12及其亲本系（KS97HW29/KS97HW131//KS96HW100 - 5）进行了评估。将亲本小麦品系置于生长箱中不同温度下，使其受到WSMV的压力，以确定抗性的稳定性，并进行了两年的田间产量试验以确认其有效性。为了确定其对一系列分离株抗性的有效性，用KS03HW12对六种不同地理来源的WSMV分离株进行了测试。在三个系谱亲本中，只有一个KS97HW29具有抗性。KS97HW29的亲本系无法用于测试；因此，无法进一步确认抗性的假定来源。在18°C时，六个测试的WSMV分离株均未系统感染KS03HW12。KS03HW12在田间试验中的产量与健康对照无差异。因此，优良冬小麦KS03HW12似乎是一种对WSMV具有稳定且有效的温度敏感抗性来源，对小麦育种计划应具有实用价值。
