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Method for producing hybrid rice seeds Chuanxiangzhan

A production method and technology of hybrids, applied in rice cultivation, botany equipment and methods, plant genetic improvement, etc., can solve problems such as high risk and uncontrollable weather influence

Inactive Publication Date: 2011-06-15
BEIJING KINGS NOWER SEED S&T
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the cost of three-line rice seeds is higher than the production of two-line rice hybrids, due to the two-line seed production, the risk is high and the uncontrollability affected by the weather

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Embodiment 1: the specific production process of hybrid Chuanxiangzhan of the present invention

[0014] Chuanxiangzhan is produced by crossing Chuanxiang 29A with the restorer line Huazhan.

[0015] Chuanxiang 29A was introduced from a high-quality three-line male sterile line bred by Sichuan Academy of Agricultural Sciences.

[0016] The restorer line Huazhan, quoted from the China Rice Research Institute, is a restorer line based on SC02-S6 from Malaysia, which has been repeatedly tested and systematically selected.

Embodiment 2

[0017] Embodiment 2: the production technology of hybrid Chuanxiangzhan of the present invention

[0018] (1) Safety isolation: Seed production isolation for other rice varieties with a spatial distance > 500 meters or an interval of more than 15 days between heading and flowering.

[0019] (2) Timely sowing: the male parent is inserted 25-30 days earlier than the female parent in the first phase, or the leaf order difference is 6.5-7.5 leaves, or the effective accumulated temperature difference between the parents is about 205°C (May 20-25 for the female parent in central Jiangsu Day sowing, the first phase of the male parent is planted around April 24), the second and third phases are separated from the previous phase by about 7 days, or the two phases of the male parent are separated by 12 days.

[0020] (3) Reasonable dense planting and suitable row ratio: the distance between plants and rows of the female parent is 16.7×10 cm, and 150,000 to 180,000 basic seedlings are pl...

Embodiment 3

[0024] Embodiment 3: the cultivation and application technology of Chuanxiangzhan hybrid

[0025] 1. Timely sowing and cultivating strong seedlings. Most of Anhui and Henan are used for sowing mid-season rice, and the seedling age is 18 to 22 days.

[0026] 2. Reasonable dense planting. The planting specification is 23 (or 26) cm × 13 cm, and 2 grain seedlings per stalk or 18,000 to 22,000 stalks per mu.

[0027] 3. Fertilizer and water management: N, P, and K fertilizers are applied together, enough base fertilizer is applied, tillering fertilizer is applied early, and seedlings are fertilized later; shallow water regenerates, thin water tillering, enough seedlings to dry the field, water retention at the ear stage, and alternating dry and wet times in the later stage Mature, avoid water prematurely.

[0028] 4. Timely prevention and control of pests and diseases.

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PUM

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Abstract

The invention belongs to the field of heterosis utilization, and particularly discloses a method for producing hybrid rice seeds Chuanxiangzhan. The hybrid rice seeds Chuanxiangzhan are new three-line early rice compositions produced by hybridizing a cytoplasmic male sterile line Chuanxiang 29A and a restorer line Huazhan, wherein the female parent Chuanxiang 29A is a high-quality and pyricularia oryzae-resistant aromatic indica sterile line commonly bred by the crop research institute of Sichuan academy of agricultural sciences and Sichuan Huafeng seed industry Co., Ltd., and has good flowering habit and high outcrossing rate; and the male parent restorer line Huazhan is an inbred line. The hybrid seeds have the characteristics of high yield, stable production, high disease resistance and high biological yield.

Description

technical field [0001] The invention relates to a production method of rice hybrid Chuanxiangzhan, which is a method for producing a new combination of hybrid rice by using a three-line method. Background technique [0002] China is a big rice country, and its rice breeding technology has always been in a leading position in the world. However, due to the growth of China's population, the problem of feeding the growing population is still the most important problem that my country's agriculture needs to solve. Although the cost of three-line rice seeds is higher than the production of two-line rice hybrids, the two-line seed production is risky and uncontrollable due to weather. In order to reduce the risk of production, seed companies use the three-line method to produce rice hybrids, which is still the most used method by seed companies. With the shortening of the replacement period of current varieties and the need to expand competition with foreign seed companies, bree...

Claims

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Application Information

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IPC IPC(8): A01H1/02A01H1/04A01G16/00A01G22/22
Inventor 李绍明谭春平徐大明李辉
Owner BEIJING KINGS NOWER SEED S&T
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