Method for removing impurities and maintaining purity for fields of shandan 8806 maize hybrid seeds

A hybrid, corn technology, applied in the directions of botanical equipment and methods, applications, and plant genetic improvement, can solve problems such as low activity, achieve accurate purity testing methods, improve field purity, and maintain the effect of yield potential

Inactive Publication Date: 2010-06-02
NORTHWEST A & F UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The drug has pre-emergence herbicidal activity, but the activity is lower than that of post-emergence

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The inbred line L102, which is sensitive to the herbicide nicosulfuron-methyl at the seedling stage, was selected as the female parent, and the maize inbred line K22 with good resistance to it was selected as the male parent, and the maize hybrid Shandan was produced according to the conventional method. 8806.

[0033] When the maize Shandan 8806 hybrid seedlings develop to the stage of three leaves and one heart to five leaves and one heart (the optimal plan is the three leaves and one heart stage), combined with weeding in the corn field, a mixed herbicide containing nicosulfuron (suspension agent, in which nicosulfuron Atrazine content 2.5%, atrazine content 19.5%), the weeds and Shandan 8806 corn plants are fully sprayed with stems and leaves at a dose of 120 grams per mu.

[0034] Since the female parent inbred line L102 has no resistance to the herbicide nicosulfuron, it can stop growing after application of the drug, and the top new leaves lose chlorosis in 4 to ...

Embodiment 2

[0036] The inbred line L102, which is sensitive to the herbicide nicosulfuron-methyl at the seedling stage, was selected as the female parent, and the maize inbred line K22 with good resistance to it was selected as the male parent to produce the maize hybrid Shandan 8806 according to the conventional method .

[0037] When the corn Shandan 8806 hybrid seedlings develop to the three-leaf one-heart to five-leaf one-heart stage (the optimal plan is the three-leaf one-heart stage), combined with weeding in the corn field, use nicosulfuron herbicide (oil suspension concentrate, the active ingredient content is 40 gram nicosulfuron-methyl / liter), according to the amount of 70-100 grams per mu, spray the stems and leaves of weeds and corn plants in an all-round way.

[0038]Since the female parent inbred line L102 plant is not resistant to the herbicide nicosulfuron, it can stop growing after application of the pesticide, and the new leaves on the top will lose chlorosis in 4 to 5 d...

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Abstract

The invention discloses a method for removing impurities and maintaining purity for fields of shandan 8806 maize hybrid seeds, which selects a maize inbred line L102 as a female parent and a maize inbred line K22 as a male parent, and produces the maize hybrid seed shandan 8806 according to the conventional method; when the maize hybrid seedlings shandan 8806 are cultured between the three-leaf stage and the five-leaf stage, weeding is performed in the maize fields, a herbicide nicosulfuron or a mixed herbicide containing nicosulfuron is selected to be sprayed on field weeds and stem leaves of the shandan 8806 hybrid seedlings to remove the female parent inbred line plants, then thinning and final singling of seedlings are performed according to the conditions of the field seedlings. The method can realize weeding in the maize fields as well as maintaining purity of the hybrid seeds, thus ensuring the field purity of the maize hybrid seed shandan 8806 and providing a simple, intuitive and accurate purity detection method for the maize hybrid seed shandan 8806.

Description

technical field [0001] The invention belongs to the technical field of utilization of crop heterosis, and in particular relates to a method for removing impurities and maintaining purity of the Shandan 8806 corn hybrid in the field. Background technique [0002] Maize is one of the earliest and most widely used crops to utilize heterosis in agricultural production. For a long time, the use of crop heterosis has become an important measure to increase maize yield and improve quality. Generally, the production of corn hybrids can be obtained in the following two ways: [0003] (1) Artificial male method; [0004] (2) Three-line method of cytoplasmic male sterility, etc. [0005] However, in the actual production of corn hybrid seeds, due to various reasons, it is impossible to completely clean and timely remove the male flowers of the female parent of the corn inbred line, or sometimes the male inbred line of the female parent is sterile due to climate and other reasons. T...

Claims

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Application Information

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IPC IPC(8): A01H1/02A01H1/04
Inventor吴权明薛吉全毛建昌张兴华南文华李发民路海东
OwnerNORTHWEST A & F UNIV