Polyploid two-line hybrid rice and breeding method thereof
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United States of America
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Apr 20, 2021
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Jul 26, 2018
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Mar 21, 2018
filing date -
Mar 21, 2018
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Abstract
A method for breeding polyploid two-line hybrid rice includes determining a tetraploid rice photo thermosensitive genic male sterile line with the gene characteristic of PMeS (polyploid meiosis stability) and a tetraploid rice restoring line with the gene characteristic of PMeS; hybridizing and matching by indica sterile/japonica restoring or japonica sterile/indica restoring hybrid combination; preparing a tetraploid rice hybrid by adopting a tetraploid rice photo thermosensitive genic male sterile line and a tetraploid rice restoring line; and breeding a stable tetraploid rice hybrid combination which is determined as the polyploid two-line hybrid rice combination. The breeding method disclosed by the present invention utilizes the strong heterosis of polyploid rice, and transforms the existing diploid heterosis into the heterosis of polyploid two-line hybrid rice; and by adopting the method disclosed by the present invention, a new polyploid two-line hybrid rice variety with large ears, large grains and high yield can be bred.
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