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Method for breeding maize inbred line

An inbred line, corn technology, applied in the directions of botanical equipment and methods, application, plant genetic improvement, etc., can solve the problems of poor resistance of hybrids, decreased reproductive yield, decreased disease resistance, etc., and achieves large and reduced pollen. Breeding land, reducing the effect of bald tip

Inactive Publication Date: 2010-05-19
YUNNAN SHIFENG SEED IND
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Problems solved by technology

However, due to the increase in breeding generations and the increase in the age of use, inbred lines will have weak viability, reduced disease resistance, and reduced reproductive output, resulting in poor resistance and low yield of the prepared hybrids.

Method used

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  • Method for breeding maize inbred line
  • Method for breeding maize inbred line

Examples

Experimental program
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Embodiment

[0023] The inbred line Mo 322 can be bred by using the Mobai No. 1 maize variety introduced from Mexico and continuously planting selfing for 5 generations. Mo 322 was used as the female parent, and the inbred line B255 introduced from the United States was used as the male parent. The hybrid seeds of Mo 322×B255 were obtained after planting, and the inbred line Mo 255 was finally obtained through 6 consecutive generations of self-breeding.

[0024] In the self-breeding Mo 322 of Mobai No. 1 mentioned above, a single plant should be selected for isolation by artificial bagging before flowering, and the male flowers should be set the day before spinning and loosening powder, and the pollen should be collected on the female flowers of the plant when it blooms the next morning. , and put on the paper bag again.

[0025] In the process of crossing Mo 322 and B255, artificial bagging and isolation should be carried out before flowering. When spinning powder, the pollen of male pare...

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Abstract

The invention relates to seed production technology for maize hybrid seeds, and belongs to the technical field of agricultural bred new seeds. NO.1 black-white introduced from Mexico is continuously bred and inbred for 5 generations to select the inbred line black 322; and the black 322 serving as a female parent and the inbred line B255 introduced from America serving as a male parent are prepared into black 322*B255 hybrid seeds, and the inbred line is inbred and selected through continuous 6 generations to obtain inbred line black 255. The selected inbred line 255 has the advantages of short stalk, multi-disease resistance, stable hereditary character and high common combining ability, and is an excellent inbred line for preparing the maize hybrid seeds.

Description

technical field [0001] The invention relates to a seed production technology of corn hybrids, and belongs to the technical field of new agricultural seed breeding. Background technique [0002] Maize inbred lines are the basis for the use of heterosis and the preparation of hybrids in maize. Maize has corresponding adaptability to the environment. To formulate high-yield, high-quality, multi-resistance and wide-adaptability maize hybrids, breeding inbred lines with excellent genetic characteristics is the key. However, due to the increase in breeding generations and the increase in the age of use, the inbred lines will have weak viability, reduced disease resistance, and reduced reproductive yield, resulting in poor resistance and low yield of the prepared hybrids. Therefore, there is an urgent need to breed new maize inbred lines to meet the needs of formulating new hybrids. Contents of the invention [0003] The technical problem to be solved by the present invention i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01H1/04A01H1/02
Inventor 雷明增赵吉奎杨云芬
Owner YUNNAN SHIFENG SEED IND
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