bnapus_bin map is an SRAP based ultra dense map for a DH population of 58 lines. The DH population was produced from a cross between a Canadian spring type canola ‘Westar’, and a Chinese semi-winter type rapeseed cultivar, ‘Zhongyou 821’. A total of 1,634 primer combinations including 12 fluorescently labeled and 442 unlabeled primers produced 13,551 mapped SRAP markers. All the SRAP markers were assembled in 1,055 bins that were placed onto 19 linkage groups.