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Breeding method for maize variety

A technology of corn and varieties, applied in the direction of botany equipment and methods, applications, plant genetic improvement, etc., can solve the problems of weakened vitality, reduced disease resistance, low yield, etc., and achieve high combining ability, wide suitability, and tolerance strong drought effect

Inactive Publication Date: 2011-08-03
贵州省毕节地区农业科学研究所
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the increase of the breeding generation and the increase of the use time of the inbred line, there will be phenomena such as weakened vitality, reduced disease resistance, and reduced reproductive output, resulting in poor disease resistance and low yield of the prepared hybrids.

Method used

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  • Breeding method for maize variety
  • Breeding method for maize variety

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Experimental program
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Effect test

Embodiment

[0021] Seed Production Technology of Inbred Line 82

[0022] The basic method of seed production: the tropical maize germplasm line 371 was used as the female parent, and three La maize inbred lines containing local germplasm background were aggregated, selfed for three generations, and the maize inbred line 269 was obtained as the male parent. A single cross was obtained by crossing, and then the single cross was used as the basic material, and then selfed for 6 generations, so as to obtain the maize inbred line 82.

[0023] 1. Land selection and isolation area setting: Select land with medium or higher fertility and irrigation conditions as the farming field. For safe isolation, there must be no other corn varieties within 500 meters of the breeding inbred line.

[0024] 2. Sowing at the right time: When the soil temperature stabilizes above 10°C, it should be sown in time. Spring sowing in Yunnan is generally done in late March.

[0025] 3. Reasonable dense planting: Calc...

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Abstract

The invention relates to a method for producing cross-bred maize seeds and belongs to the technical field of agricultural new variety breeding. In the invention, a female parent is obtained by subjecting a tropical maize seed breeding line 371 to three generations of self-breeding, a male parent is a maize self-bred line 269 which is obtained by three generations of self-breeding of a combination of three La maize self-bred lines with local seed background, the female parent and the male parent are crossed to produce single cross seeds, and the maize self-bred line 82 is obtained by 6 generations of self-breeding of the single cross seeds serving as a base material. The self-bred line 82 produced by the invention has the advantages of resisting various diseases such as gray leaf spot, along with stable hereditary property and high combining ability. The self-bred line 82 is a high-quality self-bred line for producing maize cross-bed 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 hybrid vigor and the preparation of hybrids in maize. Maize has corresponding adaptability to the environment. To prepare maize hybrids with high yield, high quality, multi-resistance and wide adaptability, breeding inbred lines with excellent genetic characteristics is the key work. However, due to the increase of the breeding generation and the increase of the use time of the inbred line, there will be phenomena such as weakened vitality, reduced disease resistance, and reduced reproductive yield, resulting in poor disease resistance and low yield of the prepared hybrids. Therefore, there is an urgent need to breed new maize inbred lines in agricultural production to meet the needs of formulating new hybrids. Contents of the inventi...

Claims

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Application Information

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IPC IPC(8): A01H1/02
Inventor 罗仕文
Owner 贵州省毕节地区农业科学研究所
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