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Breeding method of early-stage functional type super early rice variety

A functional and variety technology, applied in the fields of botanical equipment and methods, application, and plant genetic improvement, can solve the problems of rotten budding rice, restrict the development of direct seeding rice, low germination rate, etc. The effect of improving selection efficiency

Active Publication Date: 2014-08-13
CHINA NAT RICE RES INST
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Problems solved by technology

At present, many high-yield and high-quality rice varieties cannot be used for direct-seeding rice due to low germination rate and rotten buds under low-temperature flooding, which also limits the development of direct-directed rice.

Method used

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  • Breeding method of early-stage functional type super early rice variety

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Embodiment 1

[0025] Embodiment 1: A kind of breeding method of early functional super early rice variety

[0026] 1) Select rice varieties with high germination ability at suitable temperature: set the temperature of the plant incubator at 30±1°C, humidity 80%, and dark conditions for germination test, and select the rice varieties with a germination rate ≥ 95% and germination (bud length ≥ 5mm). The rice materials that need time ≤ 72h are ready for use;

[0027] 2) Seed germination low-temperature flooding treatment: The rice material seeds selected in step 1) are subjected to a low-temperature germination test under flooding conditions, the temperature of the incubator is 15±1°C, the humidity is 80%, and it is dark, and the germination rate ≥ 90% of the rice materials with germination (bud length ≥ 5mm) required time ≤ 12d are reserved;

[0028] 3) Low-temperature treatment at germination stage: low-temperature treatment is carried out on the rice materials selected in step 2), the temp...

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Abstract

The invention relates to a breeding method of an early-stage functional type super early rice variety, belonging to the field of rice breeding technology. The breeding method comprises the following steps: screening the variety of rice with high germinating capacity at proper temperature; carrying out seed germination low-temperature flooding treatment; carrying out low-temperature treatment of germination stage; carrying out normal-temperature restoration treatment; screening low-temperature-resistance variety in germination stage; continuously carrying out normal-temperature restoration treatment; carrying out low-temperature seedling stage treatment; screening low-temperature-resistant variety of seedling stage; hybridizing with superhigh-yield rice; screening seeds harvested by F1; planting into a strain F3 and selecting excellent single plants; selecting excellent single plants from F4-F6 strains, and adding generations stably; planting the strains to F7 generation, and determining and selecting to obtain the early-stage functional type super early rice variety. The obtained early-season rice can effectively avoid the irregular directly-seeded rice germination, and germ and seedling rotting caused by early-stage low temperature and flooding, the production reduction risks caused by cold damage and flooding in seeding and seedling stage are reduced, the development of the rice direct-sowing technology is promoted, and the per unit yield of double-cropping early rice at the middle and lower Yangtze river is improved.

Description

technical field [0001] The invention belongs to the technical field of rice breeding, and in particular relates to a breeding method for early functional super early rice varieties. Background technique [0002] The "early functional" super rice is relative to the "late functional" super rice. It can be understood as a new rice physiological model. Under the unfavorable environmental conditions of low temperature and flooding at the seedling stage, it shows obvious advantages in the growth physiological characteristics of roots, buds and seedlings. [0003] Rice is the main food crop in our country. Chilling damage is a common problem in rice cultivation in double-cropping rice cropping areas. It is more prominent in the early rice areas in the middle and lower reaches of the Yangtze River, Northeast my country, alpine mountainous areas, and cold water irrigation areas. Affected by low temperature, rice rots. The rotten seedlings affect the yield; on the other hand, with the...

Claims

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Application Information

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IPC IPC(8): A01H1/02A01H1/04
Inventor 焦桂爱胡培松唐绍清谢黎虹魏祥进邵高能圣忠华
Owner CHINA NAT RICE RES INST
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