Agronomic and quality effects in winter wheat of a gene conditioning resistance to wheat streak mosaic virus |
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| Authors: | L A Divis R A Graybosch C J Peterson P S Baenziger G L Hein B B Beecher T J Martin |
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| Affiliation: | (1) USDA-ARS, Department of Agronomy & Horticulture, University of Nebraska, Lincoln, NE 68583, USA;(2) Department of Crop and Soil Sciences, Oregon State University, Corvallis, OR 97331, USA;(3) University of Nebraska, Lincoln, NE 68583, USA;(4) Agriculture Research Center-Hays, Kansas State University, 1232 240th Ave, Hays, KS 67601, USA;(5) Present address: USDA-ARS, Washington State University, Pullman, WA 99164, USA |
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| Abstract: | Wheat streak mosaic virus (WSMV) is one of the most important diseases limiting winter wheat (Triticum aestivum L.) production in the western Great Plains of North America. There is no known effective WSMV resistance within the primary gene pool of wheat. However, a resistance gene (Wsm1) has been transferred to wheat from a perennial relative, intermediate wheat-grass Thinopyrum intermedium (Host) Barkworth & DR Dewey]. Nebraska-adapted winter wheat lines carrying Wsm1 were used to characterize the effects of this alien introgression on agronomic and quality traits. Sister-lines from six breeding populations were evaluated under virus-free conditions, and under a naturally occurring viral infection. In uninfected locations, no significant difference for grain yield was detected between resistant (R) and susceptible (S) lines, when averaged over populations, but resistant lines had significantly higher test weights. Within populations, significantly higher grain yield was observed only in population 1, while significantly higher test weights occurred in populations 1, 2, 5 and 6. At the infected location, resistant lines were significantly higher in yield in five of six populations. In two of six populations, susceptible lines were significantly higher in bread loaf volume and bake mix time, while in the remaining populations, no significant quality differences were observed. As the Wsm1 gene provided yield advantages under viral infection, and there was no yield detriment in the absence of the virus, its deployment in hard winter wheat cultivars merits consideration.Joint contribution of the United States Department of Agriculture, Agricultural Research Service and the Department of Agronomy, University of Nebraska-Lincoln as Journal Series Paper No. 15066. Mention of firm names or trade products does not imply that they are endorsed or recommended by the USDA or the University of Nebraska over other firms or products not mentioned. |
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| Keywords: | Triticum aestivum Wheat streak mosaic virus Wsm-1 Resistance gene Agronomic and quality effects |
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