Genetic effects on bolting date were studied in a diallel crossing involving six varieties of Chinese cabbage (Brassica campestris subsp. pekinesis ).The results indicated that:bolting date is a quantitative character which follows the additive dominant genetic model.Additive is the major effect,dominant is partial dominant,early bolting date shows dominant to later bolting time,and more recessive genes can postpone the bolting time.
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