Breeding method of dual-purpose genic male sterility line of high-quality fragrant rice

A technology of a nuclear sterile line and a breeding method, which is applied in the field of breeding of a dual-purpose nuclear sterile line of high-quality aromatic rice, can solve problems such as high technical difficulty, achieve double difficulties, ensure the safety of seed production, and facilitate regeneration and reproduction Effect

Active Publication Date: 2020-10-02
CHONGQING ACAD OF AGRI SCI
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AI Technical Summary

Problems solved by technology

At present, there are few aroma-type dual-purpose GMS lines, and it is necessary to aggregate favorable traits such as low sterile threshold temperature, aroma type, high quality, plant and leaf shape, and rice blast resistance in breeding, which is technically difficult

Method used

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  • Breeding method of dual-purpose genic male sterility line of high-quality fragrant rice

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Embodiment 1

[0028] A kind of breeding method of high-quality aromatic rice dual-purpose male sterile line (for the schematic flow chart, see figure 1 ), including the following steps:

[0029] (1) Fragrance segregation population construction: In 2013, Hainan Qiufan selected the high-quality aromatic rice maintainer Yixiang 1B as the donor, and crossed the low-sterility threshold temperature, high-quality dual-purpose GMS line Y58S as the recipient to obtain F1 (Y58S / Yixiang 1B) generation seeds;

[0030] The F1 generation was planted in Zhengji Yongchuan Base, Chongqing in 2014. Single seedlings were transplanted in 20 holes, and the miscellaneous plants were removed in 2 holes at the heading stage. According to observations, F1 (Y58S / Yixiang 1B) had normal fruiting and no rice blast or sheath blight. , collected all the seeds of F1 strains after maturity, dried and shelled mechanically, compared with Yuxiang 203, eliminated the strains whose rice quality was worse than Yuxiang 203 an...

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Abstract

The invention discloses a breeding method of a dual-purpose genic male sterility line of high-quality fragrant rice, and belongs to the breeding field. The method includes the construction of fragrance separation population, a seed drying fragrance identification method is used to carry out Hainan winter propagation primary selection and Chongqing regular season re-selection of fragrance sterile individual plants, after winter propagation and regular season addition stabilization, sterile seeds are propagated, sowing is performed the Chongqing regular season and the Hainan autumn propagation season in stages to screen low sterile start temperature sterile lines, and test cross is performed to evaluate the high-quality combining ability of fragrances, and the high-quality fragrance dual-purpose genic male sterility line is comprehensively bred. F1 population high-quality fragrance evaluation and screening indicators are put forward while the fragrance separation population is constructed , F2, F3 and F4 generations use the seed drying identification method to innovate the fragrance identification technology, the F5 generation uses the leaf KOH fragrance identification and purification, rice quality low-generation selection and fragrance combining ability screening are combined, high-quality fragrance dual-purpose nuclear sterile line is bred, and the effectiveness of the selection of fragrant dual-purpose genic male sterility line is ensured.

Description

technical field [0001] The invention relates to the field of breeding, in particular to a method for cultivating a dual-purpose male sterile line of high-quality aromatic rice. Background technique [0002] The industrial application of hybrid rice has made outstanding contributions to world food security. With the improvement of people's living standards and the diversification of dietary structure, there is a structural surplus of rice, and high-quality aromatic rice varieties have sprung up. Fragrant rice is a high-quality rice variety with an attractive and special aroma. Its types include fragrant indica, fragrant japonica and fragrant glutinous rice, all of which have a special fragrance. The rice grains are crystal clear, rich in various essential nutrients for the human body, and have certain nourishing and medicinal effects. Its aroma relieves fatigue and helps to increase appetite. In addition to being used as rice, various rice wines, rice cakes and other foods...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01H1/02A01H1/04
CPCA01H1/02A01H1/04
Inventor 张现伟李经勇肖人鹏唐永群潘晓雪刘强明李超明
Owner CHONGQING ACAD OF AGRI SCI
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