Field weeding and purity-keeping method for corn hybrids

A hybrid and corn technology, applied in the direction of botany equipment and methods, application, plant gene improvement, etc., can solve the problems of application limitations, achieve the effect of accurate purity test method, avoid field production loss, and improve the level of advantage utilization

Inactive Publication Date: 2013-06-26
NORTHWEST A & F UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But it is only suitable for corn hybrid Shandan 8806, and its application is limited for other corn hybrids

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] Shandan 22 maize hybrid was formed by crossing the inbred line M3026 as the female parent and 340x as the male parent in the Agricultural College of Northwest A&F University. In 2010, it passed the approval of Shaanxi Provincial Variety Approval Committee (Shaanxi Shenyu 2010005). This variety applied for national plant variety protection in 2010, its variety right application number is: 20100014.8, and the announcement number is: CNA006373E.

[0059] The inbred line 340X, which is sensitive to the herbicide nicosulfuron-methyl at the seedling stage, was selected as the female parent, and the maize inbred line M3026 with good resistance to it was selected as the male parent, and the maize hybrid Shandan was produced according to the conventional method. 22 backcross seeds.

[0060] When maize Shandan 22 backcross hybrid seedlings develop to three-leaf-one-heart to five-leaf-one-heart stage (optimized plan is three-leaf, one-heart stage), combined with corn field weedin...

Embodiment 2

[0063] Zhengdan 958 was bred by the Food Crops Research Institute of Henan Academy of Agricultural Sciences. The female parent inbred line is Zheng 58, and the male parent inbred line is Chang 7-2. It passed the national examination and approval in 2000 (National Examination Yu 20000009), a new plant variety The protection authorization number is: CNA20000053.5.

[0064] Both the male parent Chang 7-2 and the female parent inbred line Zheng 58 of Zhengdan 958 are resistant to nicosulfuron. The female parent line Zheng 58 was used as the female parent, and the female parent line L102 of Shandan 8806 was used as the male parent for crossing and backcrossing. Zheng 58 was used as the recurrent parent to carry out saturation backcrossing, and the main gene sensitive to nicosulfuron in L102 was introduced into the Zheng 58 maize inbred line, so as to select a herbicide nicosulfuron-sensitive and other agronomic line. The new Zheng 58 with the same traits.

[0065] The transfer of...

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Abstract

The invention discloses a field weeding and purity-keeping method for corn hybrids. The method chooses an inbred line with nicosulfuron herbicide susceptible lethality as the female parent and a corn inbred line with nicosulfuron herbicide resistance as the male parent, and a corn hybrid is produced according to the conventional method; when corn hybrid seedlings are grown to the three-leaf one-tip stage to the five-leaf one-tip stage, in combination with corn field weeding, nicosulfuron herbicide or mixed herbicide containing nicosulfuron is chosen to be sprayed on field weeds and the stem leaves of the hybrid seedlings, the plants of the inbred line as the female parent are removed, and thinning and final singling are then carried out according to the field seedling condition. Besides corn field weeding, the method also achieves the weeding and purity-keeping effect for corn hybrids, thus guaranteeing the field purity of corn hybrids, and the invention also can provide a simple, visual and accurate purity-checking method for corn hybrids.

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 corn hybrids 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. The degree of com...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01H1/02A01H1/04
Inventor 吴权明南文华毛建昌薛吉全张兴华
Owner NORTHWEST A & F UNIV
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