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Breeding method for hybrid rice

A hybrid rice and rice technology, applied in the field of hybrid rice breeding, can solve the problems of reducing the income of seed producers, increasing the cost of seed production, affecting the quality of commercial grains, etc. The effect of improving the efficiency of seed production

Active Publication Date: 2015-12-02
RICE RES ISTITUTE ANHUI ACAD OF AGRI SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the one hand, this requires a lot of labor support, which is in conflict with the current situation that a large number of rural laborers are moving to cities, and the labor force directly engaged in agriculture has been greatly reduced; The high level will affect the promotion and application of hybrid rice; moreover, the early harvest of the male parent will affect its quality as commercial grain and reduce the income of seed producers

Method used

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  • Breeding method for hybrid rice
  • Breeding method for hybrid rice

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Experimental program
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Effect test

Embodiment 1

[0042] The breeding of embodiment 1 hybrid rice

[0043] 1. Select large-grain (GW=0.6cm) (NRIL16, selected by the Rice Research Institute of Anhui Academy of Agricultural Sciences using the F4 generation of Chuandali / Yangdao 6, bred and sold by the Rice Research Institute of Anhui Academy of Agricultural Sciences) and small-grain rice ( Chuan 7, preserved by the Rice Research Institute of Anhui Academy of Agricultural Sciences, a local variety in Sichuan, GL=0.5cm) germplasm;

[0044] 2. Using the excellent two-line GMS line N876S (Guangzhan 63S) as the female parent, crossed with Minghui 63, backcrossed and self-crossed (BC 1 f 3 ), the obtained two-line sterile line, self-bred by the Rice Research Institute of Anhui Academy of Agricultural Sciences and sold to the outside world) as the female parent and hybridized with rice argentina, and N876S was used as the recurrent parent to backcross for 2-3 generations and then self-crossed.

[0045] Hefei, planting BC in early May...

Embodiment 2

[0054] The breeding of embodiment 2 hybrid rice

[0055] 1. Use 0.5% EMS to mutate the excellent two-line GMS line N876S, plant the mutagenized M1 generation (about 30,000 plants), and harvest the seeds of the mutagenized M1 plant (M2 generation, no less than 50 seeds per plant).

[0056] 2. In Hefei, in early May, plant the M2 generation seeds into rows (no less than 30 rows per row), select small-grained, and microscopically inspected individual plants with excellent agronomic properties, transplant and regenerate individual plants without pollen after stubble cutting, and harvest Seeds on regenerated rice.

[0057] 3. In the same year, Hainan, planted in mid-November, selected individual plants with small grains and excellent agronomic properties for selfing, and harvested the seeds.

[0058] 4. In the next year, Hefei, plant the seeds harvested in step 3 in early May, select a single plant with small grains and excellent agronomic properties, microscopically check, transp...

Embodiment 1

[0066] Breeding of comparative example 1 hybrid rice

[0067] 1. Select the germplasm of large-grain rice (thousand-grain weight above 40-60g) and small-grain rice (thousand-grain weight above 15g), which are Sichuan Dali (germplasm resources provided by Sichuan Rice and Sorghum Research Institute), Xiaoxiangai (Hunan Rice Research Institute) provided rice seed resources);

[0068] 2. In Changsha, the two-line GMS line Y58S was used as the female parent to cross with the large-grain rice Chuan Da-grain to obtain F 1 planted as F 2 Genetic population, select a number of excellent sterile individual plants with grain shape similar to Chuan Da grain from the population, and obtain F 3 seed.

[0069] In the same year, F 3 For generation, select excellent individual plants with a thousand-grain weight above 35g from the population, and harvest F 4 seed.

[0070] 3. Bring back to Changsha to plant F next year 4 Group, select excellent individual plants with a thousand-grain w...

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Abstract

The invention discloses a breeding method for hybrid rice and belongs to the breeding field of hybrid rice. The breeding method for hybrid rice disclosed by the invention comprises the steps: improving a rice sterile line with small grain rice germplasm to obtain a small grain sterile line which is excellent in agronomic characters; improving a rice restorer line with large grain rice germplasm to obtain a large grain restorer line which is stable in agronomic characters; and then carrying out test-mating on the small grain sterile line as a female parent and the large grain restorer line, planting a test-mating F1 generation, and selecting a hybridized combination which is excellent in character to obtain the hybrid rice. The rice length of the small grain sterile line obtained by breeding is smaller than the rice width of the large grain restorer line, so that a male parent and a hybrid can be quickly and efficiently separated, and the breeding method is suitable for mixed sowing and production of hybrid seeds and / or mechanical operation, and the efficiency and incoming of production of hybrid seeds are improved, and the cost is lowered.

Description

technical field [0001] The invention relates to a hybrid rice breeding method, in particular to a hybrid rice breeding method capable of efficiently distinguishing male parents and hybrids, and belongs to the field of hybrid rice breeding. Background technique [0002] Rice is the main food crop in China. At present, the annual rice planting area is about 430-440 million mu, of which the annual planting area of ​​hybrid rice is about 220 million mu, accounting for more than 50% of the total rice area, which is a major contribution to China's rice production and food security. made a great contribution. [0003] At present, in most of the hybrid combinations promoted in China, the male parent (restorer line) and the female parent (sterile line) are planted alternately. After powdering, the male parent is harvested in advance, and then the female parent is harvested to avoid mixing of male parent seeds. The purity and quality of the hybrids are guaranteed. Since the male par...

Claims

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Application Information

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IPC IPC(8): A01H1/02
Inventor 倪大虎杨剑波倪金龙宋丰顺李莉
Owner RICE RES ISTITUTE ANHUI ACAD OF AGRI SCI
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