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Published online 8 September 2006
Published in Crop Sci 46:2155-2160 (2006)
© 2006 Crop Science Society of America
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Introgression of a Strawbreaker Foot Rot Resistance Gene from Winter Wheat into Jointed Goatgrass

A. Perez-Jonesa,*, C. A. Mallory-Smitha, O. Riera-Lizarazua, C. J. W. Watsona, Z. Wangb, M. Rehmanb and R. S. Zemetrab

a Dep. of Crop and Soil Science, Oregon State Univ., Corvallis, OR 97331-3002
b Dep. of Plant, Soil, and Entomological Sciences, Univ. of Idaho, Moscow, ID 83844-2339


Figure 1
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  		Fig. 1. Percentage of strawbreaker foot rot (SFR) infection in two winter wheat cultivars, Madsen (MD) and Stephens (ST), three jointed goatgrass accessions, Washington (WA), Oregon (OR), and Idaho (ID), and 15 BC2S2 progenies. Vertical bars represent standard errors of the mean.

 

Figure 2
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  		Fig. 2. Strawbreaker foot rot symptoms in (a) the resistant winter wheat cultivar Madsen and (b) the BC2S2 progeny 823, and (c) the susceptible winter wheat cultivar Stephens and (d) the jointed goatgrass accession ID.

 

Figure 3
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  		Fig. 3. Starch gel showing the presence of the endopeptidase enzyme Ep-D1b allele from VPM1 in the resistant winter wheat cultivar Madsen and the BC2S2 progeny 823, and its absence in the susceptible jointed goatgrass accession ID and the winter wheat cultivar Stephens. The Ep-D1b allele is tightly linked with the strawbreaker foot rot resistance Pch1 gene.

 

Figure 4
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  		Fig. 4. Somatic mitotic metaphase of a BC2S2 progeny after acetocarmine staining showing 2n = 4x = 28 chromosomes.

 




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