The
hybrid seed production method comprises the following steps: selecting CMS
celery seeds as female parents, accelerating
germination in late July until white buds appear,
sowing the seeds in a sand table,
transplanting the seeds in a plug tray in late August, and placing the seeds in an illumination
incubator for low-
temperature treatment in mid-September, normal water and
fertilizer management during low-
temperature treatment; selecting
celery seeds as male parents, accelerating
germination in the middle ten days of September until white buds appear,
sowing the seeds in a sand table, and
transplanting the seeds in a hole tray in the first ten days of October; the celery seedlings are planted in a plastic
greenhouse in the middle ten days of November, and normal water and
fertilizer management is carried out in the
seedling stage; manual low-
temperature treatment of celery seedlings is finished in late December, and the celery seedlings are planted in a plastic
greenhouse; when 20%-30% of florets of the first-level
inflorescence of the celery seed plants bloom,
pollination is started, and the male parent seed plants are all
cut off and eliminated after
pollination is finished; when most of the seeds on the celery seed plants turn yellow, harvesting can be carried out, and
hybrid seeds are obtained.