Temperature sensitivity and efficacy of Wheat streak mosaic virus resistance derived from CO960293 wheat

Wheat yields often are limited by infection by Wheat streak mosaic virus (WSMV). Host plant resistance to WSMV can reduce losses. This study was conducted to characterize a new source of temperature-sensitive resistance found in CO960293 wheat. The source of the temperature-sensitive resistance in C...

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Published inPlant disease Vol. 90; no. 5; pp. 623 - 628
Main Authors Seifers, D.L, Martin, T.J, Harvey, T.L, Haber, S, Haley, S.D
Format Journal Article
LanguageEnglish
Published United States 01.05.2006
Subjects
crop yield
disease resistance
host plants
host-pathogen relationships
plant genetics
plant viruses
Triticum aestivum
wheat
Wheat streak mosaic virus
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Summary:Wheat yields often are limited by infection by Wheat streak mosaic virus (WSMV). Host plant resistance to WSMV can reduce losses. This study was conducted to characterize a new source of temperature-sensitive resistance found in CO960293 wheat. The source of the temperature-sensitive resistance in CO960293 is unknown. Parental and other wheat lines were tested for WSMV resistance using 51 WSMV isolates under different temperatures to determine the stability of the resistance, and yield trials were conducted in the field for 3 years. All parental wheat lines became infected by WSMV at all temperatures and were infective in back assay to 'Tomahawk' wheat. No WSMV isolate defeated the resistance of CO960293 at 18 degrees C. Yield of CO960293 in field trials was reduced in only 1 of 3 years. Our data demonstrate that this wheat line can be a valuable source of resistance to WSMV in wheat programs, particularly in areas where temperatures are cool following planting in the fall.
ISSN:0191-2917
1943-7692
DOI:10.1094/PD-90-0623