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Improving method of alternate selection of maize inbred line

An inbred line, corn technology, applied in the direction of plant genetic improvement, botanical equipment and methods, applications, etc., can solve the problems of lack and difficulty in research, and achieve the effect of improving efficiency, shortening life, and solving the limitations of drought conditions

Inactive Publication Date: 2012-07-18
HENAN AGRICULTURAL UNIVERSITY
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AI Technical Summary

Problems solved by technology

Maize hybrids are obtained by crossing their parents. Therefore, while screening their stress resistance, they must also take into account the selection of their combining ability. Compared with wheat and microorganisms, the research is more difficult, and there is still a lack of technology in this area.

Method used

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  • Improving method of alternate selection of maize inbred line
  • Improving method of alternate selection of maize inbred line

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Embodiment Construction

[0035] The following examples illustrate the present invention in detail, but do not limit the present invention in any way.

[0036] As shown in the selection process shown in Figure 1, Zheng 58 and Chang 7-2 were selected for disease resistance selection in Henan and drought resistance selection in Hainan, taking into account their high yield under normal conditions, and selecting 6 consecutive generations at the same time. Match and identify the hybrid combination, the specific breeding process is as follows:

[0037] In the first ten days of June of the first year, Zheng 58 and Chang 7-2 were selected for sowing in Henan, and plants with good disease resistance were selected from them to obtain S1 ears, and S1 ear rows and hybrid combinations were planted;

[0038] In the first ten days of November of the first year, S1 ear rows were planted in Hainan, set as seedling drought treatment and normal irrigation treatment, from which the drought-resistant plants were selected for self...

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Abstract

The invention relates to an improving method of alternate selection of a maize inbred line, which belongs to the technical field of maize breeding. Zheng 58 and Chang 7-2 are taken as base materials, the ecological conditions of high-temperature, high-humidity and being prone to maize diseases of Henan in summer are taken as disease resistance selection, the ecological conditions of dry and rainless of Hainan in winter are taken as drought resistance selection, six generations are continuously selected through the alternate selection of the disease resistance and the drought resistance in twoplaces of Henan and Hainan in one year, and the hybrid combination and the identification are simultaneously carried out, thereby enhancing the drought resistance and the disease resistance of Zheng 58 and Chang 7-2 of the maize inbred line. The stable inbred line with good stress resistance and the hybrid combination can be generally selected and bred within only three years through the south-north alternate selection, thereby greatly accelerating the generation process of the improvement of the inbred line, improving the efficiency of selecting and breeding and further achieving the purposeof fast and high-efficiently improving the maize inbred line.

Description

Technical field [0001] The invention relates to the technical field of corn breeding, in particular to an improved method for alternate selection of corn inbred lines. Background technique [0002] Corn is an important ternary crop of grain, economy and forage in my country, and it has a good development prospect. The maize plant is tall and grows in the season of high temperature and high evaporation, so it needs more water throughout its life. With the warming of the climate, mankind will face the serious challenge of water shortage. Our country directly reduces the corn harvest by about 2.3 million tons every year due to drought. Therefore, screening drought-resistant maize germplasm and breeding drought-resistant varieties are of great significance to increase maize yield. At the same time, in recent years, corn diseases in my country have become more and more serious, leading to reduced corn yield and quality, and posing a serious threat to production safety. Years of pra...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01H1/04A01H1/02
Inventor 李潮海马俊峰王小星董朋飞齐红志
Owner HENAN AGRICULTURAL UNIVERSITY
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