Propagation method of rape recessive nuclear male sterile line

The invention relates to a breeding method of a recessive nuclear male sterile line of rape, which comprises the following steps: selecting homozygous sterile plants of which the ratio of sterile plants to fertile plants is within a set range from recessive nuclear male sterile two-line homozygous lines, and transplanting the homozygous sterile plants into a greenhouse; in the greenhouse, when the homozygous sterile plants grow to budding and an initial flowering period, the temperature of the greenhouse is controlled to be increased firstly and then reduced, far infrared light irradiation is carried out, and the homozygous sterile plants are converted into fertile plants; honeybees are placed in the greenhouse for supplementary pollination selfing, and a homozygous sterile line female parent is harvested; and breeding the homozygous sterile line female parent and the homogeneous temporary maintainer line male parent to obtain the rape recessive cell nucleus male sterile line of 100% sterile plants. According