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

Abstract

The invention discloses a method for breeding a thermo-photoperiod sensitive dual-purpose genic male sterile Guangxuan S. The method for breeding the thermo-photoperiod sensitive dual-purpose genic male sterile Guangxuan S comprises the following steps: (1) taking Guangzhan 63S as a female parent and Guanghui7849 as a male parent; (2) hybridizing to obtain a hybrid F1, and mixing and harvesting a small amount of F1 seeds; (3) planting F2, selecting 12 low-panicle-enclosure and typical abortion and sterile plants to obtain F3 seeds, and planting F3 in 12 plant rows; (4) selecting three single plant line groups, cutting stubbles, and regenerating to obtain selfing seeds F4; (5) carrying out generation adding to obtain F5; (6) adopting shuttle breeding, namely south-reproduction and north-selection, from a generation F4, and synchronously breeding male sterile lines in a generation F8, wherein a male sterile line generation reaches up to F12 and is named as Guangxuan S. Rice quality of Guang18S obtained by adopting the method disclosed by the invention is as follows: coarse rice rate is 81.39%, milled rice rate is 74.4%, head milled rice rate is 71.3%, chalky kernel percentage is 21%, chalk degree is 1.5%, transparency is 1%, and grain length is 6.5mm.

Description

Technical field: [0001] The invention relates to a method for breeding a light-temperature-sensitive dual-purpose nuclear male sterile line Guangxuan S, 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 wil...

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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