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Method for breeding novel waterlogging-tolerant maize variety by using special waterlogging tolerance of teosinte

A teosinte and corn technology, which is applied in the field of breeding new waterlogging-tolerant corn materials using the special waterlogging-resistant traits of teosinte, can solve the problems of high cost, limited effect of waterlogging prevention measures, and difficulty in implementing them, so as to shorten the breeding time, The effect of broadening maize germplasm

Inactive Publication Date: 2012-07-18
唐祈林
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The general measure to reduce crop waterlogging is to improve the growing environment of crops by opening ditches and draining water. However, this method has the disadvantages of high cost and difficulty in implementation. In addition, the predictability and long duration of waterlogging adversity are poor. limited

Method used

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  • Method for breeding novel waterlogging-tolerant maize variety by using special waterlogging tolerance of teosinte
  • Method for breeding novel waterlogging-tolerant maize variety by using special waterlogging tolerance of teosinte
  • Method for breeding novel waterlogging-tolerant maize variety by using special waterlogging tolerance of teosinte

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] In March 2007, we used Teosinte grass with high waterlogging resistance and selected Nicaragua maize species as the non-recurrent parent (male parent), and crossed the inbred line R08 as the recurrent parent (female parent), and harvested F 1 substitute seeds;

[0023] Planted F in March 2008 1 Generation, and backcross with R08 (female parent), harvested BC 1 f 1 substitute seeds;

[0024] Planted BC in March 2009 1 f 1 Generation of 600 grains, flooding for 14 days at the three-leaf one-heart stage, screened to obtain individual plants with high waterlogging resistance, transplanted into the field, after the plants tasseled, removed the intermediate and wild-type plants, and used the corn-type individual plants It is the male parent and R08 backcross, and the corresponding numbers are harvested as BC by individual plants. 1 f 2 Generation Seed and BC 2 f 1 substitute seeds;

[0025] Planted BC in September 2009 1 f 2 Generation Seed and BC 2 f 1 Substitu...

Embodiment 2

[0029] In 2007, the diploid perennial Teosinte grass with high waterlogging resistance was selected as the non-recurrent parent (male parent), and the inbred line Mo17 was used as the recurrent parent (female parent) for crossbreeding, and F 1 substitute seeds;

[0030] Planted F in March 2008 1 Generation, and backcross with Mo17 (female parent), harvested BC 1 f 1 substitute seeds;

[0031] Planted BC in March 2009 1 f 1 Generation of 600 grains, flooded for 14 days at the three-leaf one-heart stage, screened to obtain individual plants with high waterlogging resistance, transplanted into the field, after the plants tasseled, removed the intermediate type and wild type plants, and used the corn type The male parent is backcrossed with Mo17, corresponding to the serial number, and BC is harvested by individual plant 1 f 2 Generation Seed and BC 2 f 1 substitute seeds;

[0032] Planted BC in October 2009 1 f 2 Generation Seed and BC 2 f 1Substitute seeds were flo...

Embodiment 3

[0036] In March 2007, the local high-adaptability maize inbred line 48-2 (relatively higher waterlogging resistance) was selected as the non-recurrent parent (male parent), and the inbred line Mo17 (relatively lower waterlogging resistance) was selected as the recurrent parent (female parent). This) was crossed and harvested into F 1 substitute seeds;

[0037] Planted F in March 2008 1 Generation, and backcross with Mo17 (female parent) to obtain BC 1 f 1 Generation seeds, and selfing to obtain F 2 substitute seeds;

[0038] Planted BC in March 2009 1 f 1 Generation Seed and F 2 Substitute seeds were flooded for 14 days at the three-leaf-one-heart stage. According to the screening criteria in Example 1 and Example 2, no single plant with high waterlogging resistance was obtained.

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Abstract

The invention discloses a method for breeding a novel waterlogging-tolerant maize variety by using the special waterlogging tolerance of the teosinte. By transferring the excellent waterlogging tolerance of the teosinte to the maize inbred line so that the maize inbred line has excellent waterlogging tolerance, the novel maize inbred line with excellent waterlogging tolerance can be obtained rapidly, the breeding time can be shortened, the excellent character of the germ plasm resource of the teosinte can be transferred to the maize, the germ plasm of the maize can be extended, the waterlogging-tolerant genes of the maize can be found, and the way of making the maize to have waterlogging tolerance can be disclosed.

Description

technical field [0001] The invention belongs to the technical field of crop breeding, in particular to a method for breeding new waterlogging-resistant corn materials using the specific waterlogging-resistant traits of teosinte grass. Background technique [0002] Global warming leads to frequent floods and droughts. Due to waterlogging and drought, the reduction of crop production in the world is increasing year by year, and the economic loss caused by frequent waterlogging is second only to drought. Except for the waterlogging caused by frequent rainstorms and floods, the soil with excessive moisture in the world accounts for about 12 %, these soils with excessive moisture are more prone to frequent crop waterlogging. [0003] Crop waterlogging generally has two meanings: wet damage and waterlogging damage. Humidity damage means that the soil is too wet, the water is in a saturated state, the soil water content exceeds the maximum water holding capacity of the soil, and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01H1/02A01H1/04
Inventor 唐祈林荣廷昭黄玉碧潘光堂吴元奇周树峰郑名敏蒋伟曹墨菊刘坚高世斌兰海卢艳丽童式刚唐磊
Owner 唐祈林
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