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Method for breeding erected-wheatear indica type three-line sterile line

A three-line sterile line, erect panicle type technology, applied in the directions of botanical equipment and methods, application, plant genetic improvement, etc., can solve the problems of poor rice quality and resistance, narrow planting range, single variety, etc., to reduce labor Intensity, faster generation process, lower production cost effect

Inactive Publication Date: 2014-05-14
福建省农业科学院水稻研究所
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problems of narrow planting range of erect panicle type japonica rice varieties (mainly in Liaoning and the lower reaches of the Yangtze River), single variety, poor rice quality and poor resistance in the current production practice of our country, and provide a kind of japonica rice that can be widely used in my country Planted erect panicle type indica three-line sterile line and its breeding method, using radiation mutagenesis combined with backcross breeding method to breed a male sterile line similar to the same type of sterile lines in other main characters but with dominant erect panicle traits , use it to select erect or semi-erect indica hybrid rice, which can improve the yield potential of hybrid rice varieties; at the same time, erect panicle is an apparent trait, which can be used as a marker gene, which is easy to remove impurities in the process of seed production and improve the yield potential of hybrid rice varieties. Hybrid Seed Purity

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Breeding of sterile lines with colorless and erect spikes.

[0021] In Fuzhou in 2008 with a dose of 300Gy 60 Coγ-rays were used to irradiate 1000 grams of dry seeds of the three-line maintainer line "206B" of indica rice. In the first season of the same year, the irradiated seeds were sown normally, and multiple M1 seedlings were transplanted, and they were mixed when they matured. In the winter of the same year, the M2 seeds were added to Hainan, and more than 5,000 plants were planted in a single plant. After 15 days of full rice, the plants with curved panicles were initially eliminated through visual inspection. The remaining plants were further measured with a protractor. The angle between the connection line of the spike tip and the extension line of the stalk is the standard of the spike angle, and individual plants with a curvature of the spike neck less than 40 degrees are selected and listed on a sign. These plants will be used as erect spike mutants. ...

Embodiment 2

[0023] Breeding of colored erect panicle male sterile lines with spikelets.

[0024] In Fuzhou in 2008 with a dose of 300Gy 60 Coγ-rays were used to irradiate 1000 grams of dry seeds of the three-line maintainer line "206B" of indica rice. In the main season of the same year, the irradiated seeds were sown normally, M 1 Multiple seedlings are transplanted and harvested after maturity. M 2 The seeds were planted in Jiadai, Hainan, and more than 5,000 plants were planted in a single plant. After 15 days of full rice ears, the plants with curved panicles were preliminarily eliminated through visual inspection, and the remaining plants were further measured with a protractor. The angle between the line and the extension line of the stalk is the standard of the ear angle, and the individual plants with the curvature of the ear neck less than 40 degrees are selected and marked. These plants will be used as erect ear mutants. After maturity, a single plant is harvested. I...

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Abstract

The invention discloses an erected-wheatear indica type three-line sterile line, and a cultivation method thereof. A dominant erected-wheatear mutant is obtained after an indica type three-line maintainer line is induced by radiation, an erected-wheatear gene is led to an excellent three-line sterile line in a hybrid backcross manner, the dominant erected-wheatear three-line sterile line is cultivated, a foundation is established for expanding the selection range of the variety by freely assembling and selecting the erected or partly erected indica hybrid rice between the varieties, a condition is provided for further enhancement of resistance to lodging, fertilizer tolerance and close planting of the rice, and the possibility of breakthrough of the yield of hybrid rice varieties is increased.

Description

technical field [0001] The invention relates to a method for cultivating an erect panicle indica sterile line variety, belonging to the technical field of plant variety breeding. Background technique [0002] Rice is one of the main food crops in my country. In recent years, with the rapid development of my country's economy, the area of ​​agricultural arable land has gradually decreased. How to stabilize and increase the total output of rice is an important problem facing my country's agricultural production. However, breakthroughs in plant type of rice and other crops are the key to achieving breakthroughs in yield, and breeding of ideal plant type in rice has increasingly become the focus of breeders. The formation of rice plant type is mainly determined by factors such as plant leaf shape and panicle shape. Its main connotation is to shape the excellent light-receiving posture of rice, so that it can fully capture and use light energy throughout the growth and growth p...

Claims

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Application Information

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IPC IPC(8): A01H1/06A01H1/04A01H1/02
Inventor 叶新福程朝平郑向华杨德卫叶宁卢礼斌
Owner 福建省农业科学院水稻研究所
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