Summary
Only a few publications deal with the genetics of auricle colour of wheat. They report that red pigmentation is conditioned by one dominant gene, symbolized Ra. Ra is present in Egyptian local wheat cultivars. My own research showed the great instability of this character.
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Zeven, A.C. The genetics of auricle colour of wheat (Triticum aestivum L.): A review. Euphytica 34, 233–236 (1985). https://doi.org/10.1007/BF00022914
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DOI: https://doi.org/10.1007/BF00022914