The Ouchterlony immuno-double diffusion and crossed immuno-electrophoresis tests each identified one specific pollen protein in each of 5 grape cultivars. Additional proteins that were common provided evidence for ‘White Roumi’ being closely related to ‘Red Roumi’ and ‘Italia’ and distantly related to ‘Thompson Seedless’. An intermediate but close serological relationship was also identified between ‘Italia’ and both ‘Bez-EI-Nakah’ and ‘Thompson Seedless’.
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Samaan et al. (1981) studied this question.
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