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Breeding method for temperate corn employing tropical germplasm

A corn breeding and germplasm technology, applied in the directions of botanical equipment and methods, application, plant genetic improvement, etc., can solve the problems of difficulty in tropical germplasm population, high cost, low efficiency, etc., and achieve the ability to adapt to the natural environment. low, high efficiency

Inactive Publication Date: 2013-04-10
SICHUAN YAYU TECH DEV CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0018] In order to solve the problems of long time, high cost and low efficiency in the process of using tropical germplasm in the temperate zone, and the difficulty of fully utilizing many tropical germplasm populations that are not suitable for the temperate zone, the present invention provides a temperate corn breeding method using tropical germplasm method

Method used

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  • Breeding method for temperate corn employing tropical germplasm
  • Breeding method for temperate corn employing tropical germplasm
  • Breeding method for temperate corn employing tropical germplasm

Examples

Experimental program
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Effect test

Embodiment 1

[0052] Example 1 Breeding of temperate-tropical germplasm inbred lines and temperate-tropical germplasm hybrids using temperate-tropical germplasm hybrid combinations

[0053] refer to image 3 , using the excellent temperate-tropical germplasm hybrid combination Zheng 32×S37 to breed the excellent temperate-tropical germplasm inbred line YA3237 and the excellent temperate-tropical germplasm hybrids Yayu 10 and Yayu Qinglan 8.

[0054] In the spring of 1989, the excellent tropical germplasm inbred line S37 and the excellent temperate germplasm inbred line Zheng 32 with complementary traits were used to match the temperate-tropical germplasm hybrid combination Zheng 32×S37 as basic materials for line selection.

[0055] In the winter of 1989, in Hainan S 1 Generations of mixed pollination, the next generation will be self-crossed in Ya'an and Hainan respectively in 1 year and 2 generations according to the pedigree method. At the same time as self-crossing, multi-generation t...

Embodiment 2

[0057] Example 2 Breeding of temperate-tropical germplasm inbred lines and temperate-tropical germplasm hybrids using temperate-tropical germplasm hybrids

[0058] refer to image 3 The fine temperate-tropical inbred line YA7937 was bred by using the excellent temperate-tropical hybrid Yayu 2 (in 1989, the excellent temperate inbred line 7922 and the excellent tropical inbred line S37 were crossed to form Yayu 2) Combine YA7937×YA8219 with excellent temperate-tropical germplasm hybrids.

[0059] In the spring of 1998 in Ya'an, the irradiated Yayu 2 was used as the basic material for line selection, and the S1 generation was selected for mixed pollination with high-quality single plants.

[0060] In the spring of 1999-2004, it was self-crossed successively in Ya'an and Chengdu. In 2004, it bred YA7937, an excellent temperate-tropical maize inbred line with stable and consistent traits and meeting the expected goals.

[0061] In the winter of 2009, the hybrid combination YA793...

Embodiment 3

[0062] Example 3 Breeding of temperate-tropical germplasm inbred lines and temperate-tropical germplasm hybrids using temperate-tropical germplasm hybrid combinations

[0063] refer to image 3 , using the temperate-tropical hybrid combination S37×N29 to breed an excellent temperate-tropical germplasm inbred line YA3729 and an excellent temperate-tropical germplasm hybrid Yayu 12.

[0064] In the spring of 1989, the excellent tropical inbred line S37 and the excellent temperate inbred line N29 with complementary traits were combined with the temperate-tropical germplasm hybrid combination S37×N29 as the basic material for line selection.

[0065] In the winter of 1989 in Hainan S 1 Generations of mixed pollination, the next generation according to the pedigree method in Ya'an, Hainan, respectively, for 1 year and 2 generations of continuous selfing. At the same time as self-breeding, the excellent temperate-tropical inbred line 7922 was used for multi-generation determinatio...

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Abstract

The invention provides a breeding method for a temperate corn employing tropical germplasm. The method comprises the steps that a temperate-tropical germplasm hybridized combination A*B or B*A crossed by a temperate germplasm selfing line A and a tropical germplasm selfing line B, a temperate-tropical germplasm hybrid C, a tropical germplasm hybridized combination D*E, or a tropical germplasm hybrid F serves as a breeding material; 1-2 generations are bred with a mixed pollination method or a method of mixed pollination after backcrossing; a single plant is selected for continuous selfing; a temperate-tropical germplasm selfing line X or a tropical germplasm selfing line Y having the characteristics of temperate germplasm and tropical germplasm is breeded through multi-generation pedigree selection; and then a temperate-tropical germplasm hybrid Z having the characteristics of the temperate germplasm and tropical germplasm is crossed. The breeding method has the benefits that the breeding time is short, the cost is low, the efficiency is high, and multiple tropical germplasm colonies not adapting to a temperate zone can be fully used.

Description

technical field [0001] The invention relates to crop breeding technology, in particular to a temperate corn breeding method using tropical germplasm. Background technique [0002] With the increase of human demand for corn and the change of natural environmental conditions, corn breeding has a long way to go and the difficulty exists for a long time. In temperate zone maize breeding, due to long-term use of temperate zone germplasm resources, the stress resistance and adaptability of hybrids are fragile and reduced, making it difficult to breed better new hybrid maize varieties. Tropical germplasm maize has the characteristics of vigorous seedlings, long growth period, tall plants, high biological yield, fast grain dehydration, well-developed root system, strong stems, strong resistance to stress, drought resistance, weed resistance, and pest resistance. Utilizing tropical germplasm resources, its excellent characteristics such as high biological yield, fast grain dehydrati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01H1/02A01H1/04
Inventor 胡学爱杨荣梁燕刘世建杨雪
Owner SICHUAN YAYU TECH DEV CO LTD
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