Method for breeding rice thermo-photoperiod sensitive dual-purpose genic male sterile

Abstract

The invention discloses a method for breeding a rice thermo-photoperiod sensitive dual-purpose genic male sterile. The rice thermo-photoperiod sensitive dual-purpose genic male sterile comprises the following steps: (1) taking Guangzhan 63S as a female parent and Guanghui499 as a male parent; (2) hybridizing and combining the Guangzhan 63S and Guanghui499 to obtain Guangliangyou 4 hybrid F1, mixing and harvesting a small amount of F1 seeds; (3) planting F2, selecting 12 plants, cutting stubbles and regenerating for carrying out self seed-setting, mixing and harvesting single plants with good restoring fertility to obtain F3 seeds, planting F3 in the same year to obtain 83 mature seedlings; (4) selecting 28 single plant lines, cutting stubbles of the single plant lines with relatively consistent agricultural current conditions and uniformity, excellent sterile stability and good flowering habit in the middle ten days of August, and regenerating to obtain selfing seeds F5; (5) adopting shuttle breeding, namely south-reproduction and north-selection, from a generation F4, synchronously breeding male sterile lines in a generation F8, producing a small amount of core seeds, and carrying out small-scale combination and isolation for seed production, wherein a male sterile line generation reaches up to F10 and is named as Guang18S.

Description

Technical field: [0001] The invention relates to a method for breeding a light-temperature-sensitive dual-purpose nuclear sterile line of rice, which belongs to the field of agricultural technology. Background technique: [0002] Hybrid rice is produced by crossing different rice species, relying on the female parent and its two objects, namely "three lines" (sterile line, maintainer line and restorer line). In terms of production, a breeding field and a production field are planted. The breeding field is planted with a sterile line and a maintainer line. When they both bloom, the maintainer line transmits pollen to the sterile line with the help of wind, insects, water, birds and other media. , the sterile line gets normal pollen fruiting, and the offspring produced are still the sterile line, so as to achieve the purpose of breeding the sterile line. We can keep a part of the propagated CMS seeds to continue to reproduce in the coming year, and the other part will be prod...

AI Technical Summary

Problems solved by technology

Conventional rice has better quality but low yield, so both high yield and high quality are unresolved problems in conventional rice and existing hybrid rice breeding

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