Summary
Previous evidence suggested that the gene for red auricle (Ra) might be linked to the gene Sr6 for stem rust resistance on chromosome 2D. However, tests indicated that Ra is not linked to either Sr6 or C, which is also on 2D.
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References
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Knott, D.R., Zeven, A.C. A test for linkage between Sr6 and Ra in wheat. Euphytica 36, 221–224 (1987). https://doi.org/10.1007/BF00730667
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DOI: https://doi.org/10.1007/BF00730667