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Method for breeding corn-rice line-three with super-strong hybridization-dominating due to distant-hybridization by rice and corn

A technology of distant hybridization and corn, which is applied in the direction of botany equipment and methods, application, plant gene improvement, etc., can solve the problems of serious separation of offspring, difficult production and application, etc., achieve high photosynthetic capacity, wide and straight flag leaves, improve The effect of nutritional structure

Inactive Publication Date: 2006-11-15
程旭波
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Problems solved by technology

Experiments have proved that when maize DNA is introduced into rice, its offspring will be severely separated and it is difficult to put it into production

Method used

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  • Method for breeding corn-rice line-three with super-strong hybridization-dominating due to distant-hybridization by rice and corn
  • Method for breeding corn-rice line-three with super-strong hybridization-dominating due to distant-hybridization by rice and corn
  • Method for breeding corn-rice line-three with super-strong hybridization-dominating due to distant-hybridization by rice and corn

Examples

Experimental program
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Effect test

Embodiment Construction

[0032] Non-limiting examples are described as follows:

[0033] 1. Using the conventional hybrid rice CMS line "Zhenshan 97A" as the female parent to carry out sexual crossing with "maize inbred line E28", the method is: artificially collect pollen from "maize inbred line E28" and pollen it to conventional hybrid rice " Zhenshan 97A" stamen stigma obtained the first generation of intergeneric hybrids, and most of the first generation materials were not fruity, indicating that the maize inbred line E28 has a maintenance effect:

[0034] Select the above-mentioned intergeneric hybrid sterile line of the first generation and continue to backcross with "maize inbred line E28" to obtain the first generation of backcross sterile line A1, and then use "E28" to backcross with A1 to obtain the second generation of backcross sterile line The breeding line A2 was backcrossed to the eighth generation in this way, and the maize and rice male sterile line A8 with excellent agronomic propert...

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Abstract

A method for selectively culturing three lines of hybrid corn rice with ultra-strong dominance by distant hybridization between paddy rice and corn includes such steps as respective sexual hybridization of the sterile line of hybrid rice with the selfing line and recovery line of corn, and continuous respective backcross of the obtained first hybrid generation with the selfing line and recovery line of corn to obtain the sterile line, maintenance line and recovery line of corn rice, which have ultra-strong dominance, high resistance to stress and high yield.

Description

1. Technical field [0001] The invention relates to a method for breeding new varieties of crops by sexual hybridization, in particular to a method for breeding three lines of superdominant maize and rice by distant hybridization between the genera of rice and maize. 2. Background technology [0002] my country's hybrid rice research is at the leading level in the world. After more than 30 years of development, conventional hybrid rice with a yield of more than 700 kg per mu and super rice with a high yield of more than 800 kg have come out. Conventional hybrid rice and super rice are obtained by interspecific hybridization of rice. Due to the inbreeding of its interspecifics, the stress resistance performance deteriorates year by year, and it is difficult to further improve the yield and rice quality. Therefore, only by interbreeding with intergeneric varieties with distant quality sources can we obtain new rice varieties with super advantages. The greater the difference be...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01H1/02A01H1/04
Inventor 程旭波程海波柳艳舟储昭立蒋昌齐陈庆三
Owner 程旭波
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