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In red raspberry a major gene, R , is proposed which controls the formation of rhamnose-containing fruit pigments, cyanidin, 3-rutinoside (Cy 3-Ru) and cyanidin 3-glucosylrutinoside (Cy 3-GIRu). Genotypically ‘Willamette’, ‘Washington’ and ‘Matsqui’ are rr , ‘Canby’, ‘SHRI 6626/41’ and ‘SHRI 6531/42’ are Rr and ‘SHRI 6531/84’ is RR .
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Barritt et al. (1975) studied this question.
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