Variation in the protein content of single seeds of four varieties of oil seed rape

Single seeds of four varieties of oil seed rape, Bronowski, Gulle, Zephyr and Oro were analysed for protein content using a micro‐Kjeldahl method. Considerable variation was detected and protein levels ranged from 11 to 42% of total seed dry weight. Approximately 70% of the seed protein was found in the cotyledons. Heavier seeds were found to contain more protein in all four varieties, though no correlation could be detected between the percentage protein content of the seeds and seed weight.