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

Abstract

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 production, and does not affect the quality characteristics of maize while increasing the yield of the seed production.

Description

technical field [0001] The invention relates to the technical field of maize hybrid breeding, in particular to a method for breeding a double-maintainer maize cytoplasmic male sterile hybrid. Background technique [0002] Maize is an annual grass plant, a monoecious cross-pollinated crop, and the natural hybridization rate is over 90%. Maize hybrids are seeds produced by crossing two inbred lines. The generation of heterosis is strong and the yield is significantly increased. Maize crops are planted to use heterosis to obtain high yield. However, when preparing hybrids, manual detasseling is required, which not only increases the labor intensity and improves the cost of seeds, but also makes it difficult to ensure the quality of hybrids due to incomplete detasseling. Cytoplasmic male sterile lines play a very important role in the use of heterosis. Plants that exhibit male sterility, because their own male gametes are aborted, while female organs and gametes develop normall...

AI Technical Summary

Problems solved by technology

There is currently no method of using double maintainer lines in the breeding of maize cytoplasmic male sterile hybrids

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