Corn hybrid breeding method

A hybrid, corn technology, applied in the directions of botanical equipment and methods, application, plant genetic improvement, etc., can solve the problem of inbred lines and hybrid combination traits and yield characteristics, hinder the development and progress of corn breeding and production, corn germplasm problems such as narrow resources, to achieve the effect of good quality, high yield and high keratin content

Inactive Publication Date: 2009-07-22
BEIJING KINGS NOWER SEED S&T
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AI Technical Summary

Problems solved by technology

[0002] The narrow maize germplasm resources have seriously hindered the development and progress of maize breeding and production in my country. Most of the maize hybrids that have been widely used in maize production in my country in the past 20 years come from Lancaster,

Method used

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  • Corn hybrid breeding method

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Experimental program
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Effect test

Embodiment 1

[0023] Embodiment 1: The specific breeding process of the hybrid Nonghua 27 of the present invention

[0024] Nonghua 27 was bred by heterozygous hybridization of Beijing Golden Nonghua Seed Industry Company's 2005 self-selected line 5H558 as the female parent and Huang C (selected) as the male parent. Among them, 5H558 was bred by 6 generations of American hybrid X1132X. The male parent, Huang C (selection), was bred by continuous selfing of the Huang C mutant strain for 6 generations. Nonghua 27 is a multi-point variety test variety in 2006, with outstanding yield, with an average yield of 886.8 kg per year, which is 36.8% higher than that of the control variety Nongda 108. In 2007, it participated in the preparatory test of the spring sowing group in Hebei Province with an average yield of 808 kg per 6 points , 29.83% higher than the control variety Sanbei No. 6, ranking first among the 171 tested varieties.

[0025] 1), output performance:

[0026] In 2006, the multi-po...

Embodiment 2

[0035] Embodiment 2: the seed production technology of hybrid Nonghua 27 of the present invention

[0036] 1. Ensure safe isolation: No other corn crops can be planted within 300 meters around the seeding field.

[0037] 2. Elimination of miscellaneous and inferior: Before the father and mother parents spin silk, remove all the miscellaneous plants in the parent and female parent lines, and mutate the plants.

[0038] 3. Staggered sowing: first sow the male parent of the first phase, and then sow the male parent of the second phase after the first phase of the male parent sees roots and buds.

[0039] 4. Harvest at the right time: Harvest when the bract leaves turn yellow and the grains appear mature "black layer".

[0040] 5. Precipitation and bud protection: choose a ventilated place to dry well to prevent frostbite and mildew.

Embodiment 3

[0041] Embodiment 3: the production technology of hybrid Nonghua 27 of the present invention

[0042] It is suitable for spring planting in Beijing, Hebei Province, and Northwest corn areas.

[0043] 1. Sowing date and seed treatment

[0044] Site selection and sowing date: It is suitable for planting on flat land and low-lying land with medium fertility; the ground temperature of 5 cm above the ground is stable through 8. C is the suitable sowing time.

[0045] Seed treatment: use seed coating agent for seed coating treatment to improve insect resistance and disease resistance, and ensure that the seedlings are full, complete and strong in one sowing.

[0046] 2. Planting density and form

[0047] It is suitable for seed clearing, the planting density is 3500 plants / mu, and the optimal number of harvested plants is 3300 plants / mu.

[0048] 3. Fertilization

[0049] Nonghua 27 is a mid-scroll type hybrid that is tolerant to fertilizer and water; sufficient organic fertili...

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Abstract

The invention belongs to the field of heterosis utilization, and particularly relates to a seed selection method for corn hybrid species. The method takes inbred line 5H558 as a female parent and takes inbred line yellow C (selected) as a male parent to hybridize so as to prepare a corn hybrid species, Nonghua 27, wherein the inbred line 5H558 is obtained by taking US hybrid species of X1132X as base material, and adopting a pedigree method through continuous inbred 6-generation seed selection, and the inbred line yellow C (selected) is obtained through continuous 6-generation inbred by the pedigree method based on the variant strain of an introduced yellow C. The hybrid species is characterized by high yield, stable yield, high disease resistance, and high biological output.

Description

technical field [0001] The invention relates to a method for breeding corn hybrids, which belongs to the field of utilization of corn heterosis. Background technique [0002] The narrow maize germplasm resources have seriously hindered the development and progress of maize breeding and production in my country. Most of the maize hybrids that have been widely used in maize production in my country in the past 20 years come from Lancaster, Reed The four lines of Huangmaya, Ludahonggu and Tangsipingtou not only have the problem of genetic vulnerability, but also the selected inbred lines and hybrid combinations have no characteristics in terms of traits or yield, and it is difficult to have a large breakthrough. [0003] The history of my country's corn breeding tells us: "The introduction and application of foreign excellent resources is one of the important reasons for the development and progress of my country's corn breeding and production for more than 20 years", so we shou...

Claims

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Application Information

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IPC IPC(8): A01H1/04A01H1/02
Inventor 尤恩训董君霞
Owner BEIJING KINGS NOWER SEED S&T
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