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ARS Home » Plains Area » Manhattan, Kansas » Center for Grain and Animal Health Research » Hard Winter Wheat Genetics Research » Research » Publications at this Location » Publication #331148
Title: Resistance to wheat streak mosaic virus and Triticum mosaic virus in wheat lines carrying Wsm1 and Wsm3

Author
item KUMSSA, TADELE - Kansas State University
item ZHAO, DONGLAN - Kansas State University
item Bai, Guihua
item ZHANG, GUORONG - Kansas State University

Submitted to: European Journal of Plant Pathology
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 7/15/2016
Publication Date: 8/5/2016
Publication URL: https://handle.nal.usda.gov/10113/5491319
Citation: Kumssa, T., Zhao, D., Bai, G., Zhang, G. 2016. Resistance to wheat streak mosaic virus and Triticum mosaic virus in wheat lines carrying Wsm1 and Wsm3. European Journal of Plant Pathology. doi:10.1007/s10658-016-1021-8.

Interpretive Summary: Wheat streak mosaic virus (WSMV) and Triticum mosaic virus (TriMV) diseases are two important wheat viral diseases in the US Great Plains. Three resistance genes, Wsm1, Wsm2, and Wsm3, have been reported to date, and their resistance is temperature-sensitive. To determine the threshold temperatures for Wsm1 and Wsm3, wheat lines C.I.15092 (Wsm1), KS96HW10-3 (Wsm1), and KS12WGGRC59 (Wsm3) were evaluated for WSMV resistance at 27, 30, 33 and 35C and for TriMV resistance at 18, 21, 24, 27, 30, 33 and 35C. Only C.I.15092 showed resistance to WSMV at up to 30C, and tolerance to TriMV at up to 35C. The other two lines showed resistance to TriMV at up to 21C. Molecular marker data suggested that C.I.15092 may carry not only Wsm1, but also additional gene(s) other than Wsm2 or Wsm3. This line may be very useful for improving resistance to WSMV in wheat that functions at the higher temperatures often encountered in the early fall or late spring of winter wheat cropping cycles.

Technical Abstract: Wheat streak mosaic virus (WSMV) and Triticum mosaic virus (TriMV) are important viruses of wheat (Triticum aestivum L.) in the Great Plains of United States. In addition to agronomic practices to prevent damage from these viruses, temperature sensitive resistance genes Wsm1, Wsm2 and Wsm3, have been identified. However, threshold temperatures for Wsm1 and Wsm3 have not been clearly defined. To better understand these two resistance genes, wheat lines C.I.15092 (Wsm1), KS96HW10-3 (Wsm1), and KS12WGGRC59 (Wsm3) were evaluated for WSMV resistance at 27, 30, 33 and 35oC and for TriMV resistance at 18, 21, 24, 27, 30, 33 and 35oC. The results showed that only C.I.15092 remained resistant at 30oC for both viruses. This line also tolerated TriMV at 33 and 35oC with less sever symptom and lower infection rates. Wheat lines KS96HW10-3 and KS12WGGRC59 hold resistance to TriMV up to 21oC. Molecular marker results suggested that the resistance in C.I.15092 is most probably conditioned by the resistance gene Wsm1 and additional gene(s) other than Wsm2 and Wsm3.