Breeding method of novel strain of high-quality, high-yield, multi-resistance and high-combining ability corn selfing line

A technology of inbred lines and new lines, applied in the direction of botany equipment and methods, application, plant gene improvement, etc., can solve the problems of difficulty in adapting to the mechanization of corn production, unsuitable for dense planting and mechanized operations, low germination potential of corn seeds, etc. problems, to achieve the effect of effective utilization, high appearance quality, and good bract tightness

Active Publication Date: 2014-01-29
MAIZE RES INST GUANGXI ACADEMY OF AGRI SCI +1
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Problems solved by technology

[0003] At present, the existing corn varieties in my country cannot meet the needs of production, mainly including the varieties with poor stress resistance, unsuitable variety traits, unsuitable seed quality, and difficult to adapt to the requirements of corn production mechanization
The development of the corn seed industry is relatively backward, and the situation is particularly severe. Although there are a large number of domestic corn varieties, the level of original inbred lines is low. Compared with some foreign dominant varieties, most domestic corn varieties are not suitable for close planting and mechanized operations. The germination potential of seeds is low, and foreign seeds are forced to withdraw domestic seeds, crowding out the domestic seed market, weakening my country's breeding advantages, and seriously threatening food security

Method used

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Examples

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Embodiment 1

[0028] Example 1 Breeding method of new corn inbred line Guizhao 18421

[0029] 1. In 1999, the inventor introduced the corn population Swan(late)C from Thailand 4 , and evaluate the growth period, plant agronomic traits and disease resistance. From 2000 to the first half of 2001, the pedigree method was used to select the best plants from the population for self-crossing and selection to the S3 generation. In this step, the selection planting density was 57,000 plants / hm 2 ;

[0030] 2. In the second half of 2001, the combining ability of the S3 strain was determined, and the SN-18-3-1 and SN-4-2-1 strains were identified in the second half of 2002. In this step, the planting density was selected to be 57,000 plants / hm 2 ;

[0031] 3. In the first half of 2003, the circular breeding strategy was applied, and SN-18-3-1 and SN-4-2-1 from the same population were used to form the basic material SN-18-3-1×SN-4-2-1 for Department of selection. In the second half of 2003, th...

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Abstract

The invention discloses a breeding method of a novel strain of a high-quality, high-yield, multi-resistance and high-combining ability corn selfing line. The breeding method comprises that through selfing of optimal plants of a corn line Swan(late)C4, the novel strain Guizhao 18421 of the high-quality, high-yield, multi-resistance and high-combining ability corn selfing line is obtained. The Swan(late)C4 as a base breeding material has high resistance, good appearance quality and good fecundity. Through circulation breeding and high-density selective stress, the Guizhao 18421 has excellent properties such as good quality, high yield, multi-resistance and high-combining ability and can be used as a base material for production of an excellent corn hybrid and improvement on corn seed quality.

Description

technical field [0001] The invention belongs to the technical field of crop breeding, and in particular relates to a breeding method for a high-quality, high-yield, multi-resistant and high-matching new corn inbred line. Background technique [0002] Corn is an important crop in the world, and its total output is second only to wheat, ranking second. Corn has risen to become the largest food crop in my country and has an important strategic position in food security. Leading and supporting the development of my country's modern corn industry is the fundamental task of the scientific and technological progress of the national corn industry technology system. [0003] At present, the existing corn varieties in my country cannot meet the production needs, mainly including the varieties with poor stress resistance, unsuitable variety traits, unsuitable seed quality, and difficult to adapt to the requirements of mechanized corn production. The development of the corn seed indust...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01H1/02
Inventor 文仁来何雪银田树云苏月贵吴翠荣闫飞燕何静丹何懿滕辉升王飞林王艳婷
Owner MAIZE RES INST GUANGXI ACADEMY OF AGRI SCI
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