Inheritance of Resistance to Stagonospora nodorum Leaf Blotch in Kansas Winter Wheat Cultivars

Plant Disease
Yong-Ki KimWilliam W Bockus

Abstract

Stagonospora nodorum blotch can cause serious yield and quality losses of wheat (Triticum aestivum) in many countries worldwide. Although there are other control methods, host resistance is the most desirable. Three recent Kansas winter wheat cultivars (Betty, Heyne, and 2163) have been developed with moderate levels of resistance to the leaf phase of Stagonospora nodorum blotch. To determine inheritance of resistance and allelism, these cultivars were crossed with one of three susceptible lines (Larned, KS96WGRC39, or Newton) and intercrossed in all possible combinations, including reciprocals. The parents, F1, F2, and F3 generations were tested for resistance to S. nodorum in the greenhouse as 4-week-old seedlings. Cytoplasmic effects were not detected in any cross. The mean levels of infection in the F1s of the two crosses Betty × Larned and Heyne × KS96WGRC39 indicated resistance was dominant. The observed phenotypic ratios of F2 plants for both crosses were not significantly different from the expected ratio for a single dominant gene. The ratio observed for F3 lines in the Betty × Larned cross fit that expected for a single dominant gene. However, the observed ratio of the F3 lines from the cross Heyne × KS96WGRC39 did no...Continue Reading

References

Nov 10, 2001·Annual Review of Phytopathology·Barry M Cunfer, Peter P Ueng
Apr 1, 1995·Genome Génome / Conseil National De Recherches Canada·H Ma, G R Hughes
May 1, 2001·Plant Disease·William W BockusMerle G Eversmeyer

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Citations

Aug 14, 2012·Genetics and Molecular Biology·Fethi BnejdiMohamed El Gazzah
Jan 11, 2007·Genome Génome / Conseil National De Recherches Canada·Zhaohui LiuJustin D Faris

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