Inheritance of Wheat Streak Mosaic Virus Resistance in KS03HW12.

Wheat streak mosaic (WSM), caused by Wheat streak mosaic virus (WSMV), is a destructive viral disease in wheat (Triticum aestivum L.). Host resistance is a primary and effective way to control the disease. KS03HW12 is a newly discovered resistance source. The objective of this study is to determine the inheritance of WSMV resistance in KS03HW12. KS03HW12 was crossed with susceptible parents KS03HW15 and KS04HW87. Parents, F1 and F2 were evaluated for WSMV reaction at 18⁰C in the growth chamber after artificial inoculation with Sydney-81. F2 derived F3 progenies were further evaluated for WSMV reaction to confirm the F2 segregation ratio. Our results showed that the WSMV resistance in KS03HW12 is controlled by two dominant genes with epistasis.