Method for breeding double-maintainer-line maize cytoplasmic male sterile hybrid

The invention discloses a method for breeding a double-maintainer-line maize cytoplasmic male sterile hybrid. According to the method, a cytoplasmic male sterile line material A and a maintainer lineB1 are subjected to continuous back cross to obtain a stable male sterile line A1, a stable cytoplasmic male sterile line material A1 and the maintainer line B1 are subjected to continuous back crossto obtain a stable male sterile line A1, the stable male sterile line A1 and a maintainer line B2 are hybridized to obtain a hybrid cytoplasmic male sterile line A2; the hybrid cytoplasmic male sterile material A2 and a cytoplasmic male sterile restorer line material R are hybridized to obtain an F1 hybrid with fertile pollen. The provided method for breeding the double-maintainer-line maize cytoplasmic male sterile hybrid has the advantages that a double-maintainer-line line is utilized in the breeding method of the maize cytoplasmic male sterile hybrid, which can significantly increase the yield of the seed productio