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Breeding method of long and small-grain two-line male sterile line of rice, light and simple seed production method of hybrid rice

A hybrid rice and rice technology, which is applied in the field of hybrid rice, can solve the problems of poor quality of combined rice, and achieve the effects of high quality of rice, improved diversity and strong combining ability.

Active Publication Date: 2022-06-07
HUNAN AGRICULTURAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The invention provides a breeding method of long and small-grain two-line male sterile line of rice and a light and simple seed production method of hybrid rice, so as to solve the problem of combining rice with the existing rice small-grain male sterile line suitable for light and simple mechanized seed production. poor quality problem

Method used

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  • Breeding method of long and small-grain two-line male sterile line of rice, light and simple seed production method of hybrid rice
  • Breeding method of long and small-grain two-line male sterile line of rice, light and simple seed production method of hybrid rice
  • Breeding method of long and small-grain two-line male sterile line of rice, light and simple seed production method of hybrid rice

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Effect test

Embodiment 1

[0053] In the summer of 2012, C815S was used as the female parent and Taifeng B was used as the male parent to obtain the hybrid F1. The hybrid F1 was planted in Sanya, Hainan to obtain the F2 generation. The F2 generation was planted in Changsha in April, and the grain length was greater than 10mm and the thickness was less than 2mm. The F3 generation was obtained by planting the seeds. In the F3 generation, the seeds with strong tillering ability, short plants, grain length greater than 10 mm and thickness less than 2 mm were selected to obtain the F4 generation. The seeds of the lines with a length of more than 10mm and a thickness of less than 2mm were planted, and after 5 years and 9 generations of directional cultivation, the long and small grain two-line male sterile line 1146S was bred in the winter of 2016. The selection process is shown in Table 1.

[0054] Table 1 The breeding process of long and small grain type two-line male sterile line

[0055]

[0056]

Embodiment 2

[0058] During the hybrid seed production in Changsha, Hunan in May 2019, the rice restorer line 8W796 was used as the male parent and 1146S was used as the female parent. , On May 29th, sow in two phases, raise seedlings by throwing seedlings, 6 / 6 of the male parent is thrown in the field, 5500 holes per mu, before sowing the female parent, the field is required to be leveled, the flatter the better, when sowing, the field surface requirements There is no water, ditches around, and a trailer in the middle. The female parent sows Bud Valley on June 6. The female parent is required to open the box when sowing. The width of the box is 2.2 meters, which is convenient for field work; the female parent is weighed according to the area of ​​each mound field. It is easy to sow evenly. After the female parent is sown, when there is no water in the field (2nd to 3rd day), close the weeding according to the weather, and then keep the field without water for at least 3 days; apply 30kg of ...

Embodiment 3

[0065] During hybrid seed production in Changsha, Hunan in May 2019, the large-grain male parent Wanghui 780 was used as the male parent, and 1146S was used as the female parent. Sowing in two phases on the 23rd of May and 27th of May, raising seedlings by throwing seedlings, 6 / 6 of the male parent is planted in the field, 5 500 holes per mu. Before sowing the female parent, the field is required to be leveled, the flatter the better. The surface of the field requires no water, ditches around it, and a trailer in the middle. The female parent sows bud valley on June 6, and the female parent is required to open the box when sowing. The width of the box is 2.2 meters, which is convenient for field work; It is easy to sow evenly. After the female parent is sown, when there is no water in the field (the 2nd to 3rd day), close the weeding according to the weather, and then keep the field without water for at least 3 days; After watering, apply 30 kg of compound fertilizer per acre ...

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Abstract

The invention discloses a breeding method of long and small-grain two-line male sterile line of rice and a light and simple seed production method of hybrid rice. Hybridization is obtained by using C815S as the female parent and Taifeng B as the male parent to obtain hybrid F1, and planting F1 to obtain F2 In the F2 generation, the seeds with a grain length greater than 10mm and a thickness less than 2mm were selected and planted to obtain the F3 generation. In the F3 generation, the seeds of a single plant with strong tillering ability, short plants, grain length greater than 10mm and thickness less than 2mm were selected and planted to obtain F4 In the F4 generation and the F5 generation, the seeds of the lines with good rice quality, grain length greater than 10mm and thickness less than 2mm are screened for planting, and then the seeds of the F9 generation or above obtained through more than 4 generations of cultivation are rice long and small grain type. Two-line CMS. According to the breeding method of the rice long-small-grain type two-line male sterile line of the present invention, the rice long-small-grain type two-line male sterile line obtained has the characteristics of ideal plant type, good outcrossing characteristics, strong combining ability, good resistance, and excellent rice quality. Suitable for light and simplified mechanized seed production.

Description

technical field [0001] The invention relates to the field of hybrid rice, in particular, to a breeding method for a long-small-grain type two-line sterile line of rice. In addition, the present invention also relates to a light and simplified seed production method for hybrid rice. Background technique [0002] In the early days, the American Ring Seed Company began to carry out the mechanized seed production experiment on the hybrid rice combination Nanyou 2 bred in my country; after that, Germany, Japan and other countries also successively carried out research on the mechanized seed production technology of hybrid rice. In Brazil, Argentina and other South American countries, the American Rice Technology Corporation and Germany's Bayer have adopted the parent-based mechanical dry-row seeding, mechanical or agricultural aircraft spraying, fertilizing, helicopter powdering, mechanical harvesting and other seed production technologies, realizing large-scale mechanized planti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01H1/02A01H1/04
CPCA01H1/02A01H1/04Y02A40/10
Inventor 明兴权唐文帮邓化冰张桂莲王峰肖云华王悦陈秋红卢学丹
Owner HUNAN AGRICULTURAL UNIV
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