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Novel cross breeding of rice and its tech. for same

A hybrid rice and rice technology, applied in the directions of botanical equipment and methods, application, plant gene improvement, etc., can solve the problem that the seed setting rate and heterosis of the indica-japonica hybrid F1 generation cannot have both, and the indica-japonica subspecies hybrid F1 generation. low problems, to achieve the effect of strong heterosis, normal seed setting rate and strong disease resistance

Inactive Publication Date: 2004-09-15
CHENGDU INST OF BIOLOGY CHINESE ACAD OF S
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Problems solved by technology

[0005] The purpose of the present invention is to overcome the difficulty of low seed setting rate of the indica-japonica subspecies hybrid F1 generation under the existing breeding and seed production method conditions, and solve the contradiction that the seed-setting rate and heterosis of the indica-japonica subspecies cross F1 generation can not have both

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  • Novel cross breeding of rice and its tech. for same
  • Novel cross breeding of rice and its tech. for same
  • Novel cross breeding of rice and its tech. for same

Examples

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example 1

[0034]Example 1: The inventor started indica-japonica hybrid breeding in 1988 (see Figure 5), and selected several indica-japonica restorer lines from the selfed F4 generation of Fujiang No. 2 and 02428 hybrid offspring. Its average seed setting rate is 30%-40%, but its biological yield is high and its heterosis is strong. Through 8 generations of chromosome behavior analysis, molecular hybridization, cell and embryo development research, it has been fully demonstrated that they are true hybrids of indica and japonica with high uniformity and stability. The hybrid combination prepared with it and the indica-type CMS line D90A showed strong indica-japonica heterosis. The hybrid F1 generation had strong green stems, ideal plant type, and a seed setting rate of 80%. This year, the demonstration in Shifang City, Sichuan Province is nearly 150,000 square meters, and the average yield is about 15% higher than that of the control popularized seed Youyou 63 and Gang 22. It is early-ma...

example 2

[0037] Example 2: The inventor used biotechnological methods such as asexual reproduction and ACHT to shorten the time to obtain a strong indica-japonica restorer line, and is mating with a japonica-type male sterile line, and also obtained some strong indica-japonica restorers. The dominant hybrid combination, whose appearance is indica-japonica rice, is a high-yielding, high-quality, multi-resistance strong indica-japonica dominant hybrid.

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Abstract

A cultivating technique for hybridized rice, which uses the inter-subspecies heterosis of nonglutinous rice features that the low-generation, high-hybridization and strong-dominancy recovery line of nonglutinous rice is chosen, cultivated and stabilized its heterosis is used through androgamete to resolve the contradiction between low bearing rate and heterosis, resulting in a hybridized combination with high yield increased by 15% and high quality.

Description

[0001] 1. Field [0002] The invention belongs to a new method for utilizing heterosis between indica and japonica subspecies. 2. Background technology [0003] my country is a big rice planting country in the world, and there have been indica rice and japonica rice since ancient times, that is, indica subspecies and japonica subspecies. The hybrid F1 of indica rice and japonica rice has strong heterosis, which has attracted the attention of the world. In 1951, Yang Shouren started research on hybrid breeding of indica and japonica rice at the Agricultural College of Shandong University in Qingdao, and pointed out that indica and japonica rice have the characteristics of learning from others. In 1987, Yuan Longping clearly pointed out in the article "Hybrid Rice Breeding Strategy" published in "Hybrid Rice" that the use of heterosis between indica and japonica subspecies may be a feasible way to break the stagnant rice yie...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01H1/02A01H1/04
Inventor 吴伯骥涂升斌
Owner CHENGDU INST OF BIOLOGY CHINESE ACAD OF S
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