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Breeding method of sweet and glutinous fresh corn variety

A technology for fresh-eating corn and waxy corn, applied in the field of fresh-eating waxy corn, can solve the problems of low starch content in seeds, unsuitable for quick-freezing processing, low seed germination rate, etc., improve the taste and quality, and meet the diversified needs of production and market. , the effect of high sugar content in grains

Active Publication Date: 2022-07-29
BEIJING ACADEMY OF AGRICULTURE & FORESTRY SCIENCES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with pure waxy corn, the average sweetness of sweet and waxy corn ears is higher, but it is not suitable for quick-freezing processing; (sh2 sh2wxwx), the process is complicated, and the breeding period is long; and due to the low starch content of the seeds, there are problems such as low seed germination rate, weak emergence, and poor resistance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Example 1 Breeding of sweet and waxy superior inbred lines

[0041] The present embodiment provides the breeding process of sweet and waxy excellent inbred lines, and the steps are as follows:

[0042] (1) Taking my country's excellent waxy maize variety Zhongnuo No. 2 as the basic material, self-crossed to obtain the S1 population. The superior strain was selected to continue selfing for one generation to obtain the S2 population.

[0043] (2) In the S2 population, the superior plants were selected and crossed with the super sweet waxy homozygous double crypto-backbone inbred line D6644, which was independently bred by the Maize Research Center of the Beijing Academy of Agriculture and Forestry, to obtain the first generation of hybrid seeds.

[0044] (3) Plant the first-generation seeds of the hybrid, and select the excellent individual plants with good growth, strong resistance and good greenness to carry out bagging selfing to obtain selfed ear.

[0045] (4) Selec...

Embodiment 2

[0050] Example 2 Breeding of sweet and waxy fresh corn hybrids 1

[0051] (1) Taking A in Example 1 as the male parent, and taking the backbone inbred line of Chinese waxy maize as the female parent, hybridization was performed to obtain hybrid seeds.

[0052] (2) To plant the above hybrids, first carry out comprehensive character identification, and select the combination with strong plants, dark green leaves, good greenness of bracts and strong resistance; further, at the milk maturity stage of the ear (20-26 day) to detect the sugar content of the grains, and identify the combination with a sugar content of more than 12%; further, 27-31 days after pollination of the ear, detect its water content, and identify the water content of the grains 31 days after pollination Still more than 50% of the mix.

[0053] (3) After the above detection and selection, an excellent variety Jingke Tiannuo 789 was bred. In the vegetative growth stage, the plants grew vigorously, and the plants...

Embodiment 3

[0056] Example 3 Breeding of sweet and waxy fresh corn hybrids 2

[0057] (1) Taking A in Example 1 as the female parent and the backbone inbred line of Chinese waxy maize as the male parent, hybridization was performed to obtain hybrid seeds.

[0058] (2) To plant the above hybrids, first carry out comprehensive character identification, and select the combination with strong plants, dark green leaves, good greenness of bracts and strong resistance; further, at the milk maturity stage of the ear (20-26 day) to detect the sugar content of the grains, and identify the combination with a sugar content of more than 12%; further, 27-31 days after pollination, the water content of the ear is detected, and it is identified that the water content of the grain is still 31 days after pollination. A combination of more than 50%.

[0059] (3) After the above detection and selection, an excellent variety H was selected, with strong plant growth, good greenness of plants and bracts, and s...

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Abstract

The invention relates to the technical field of fresh-eating waxy corn, in particular to a method for breeding sweet and waxy-type fresh-eating corn varieties. In the breeding method provided by the invention, a sweet waxy corn inbred line A is created by crossing a waxy corn variety and a super sweet and waxy homozygous double-cryptic backbone inbred line; Cross-bred hybridization to obtain sweet glutinous fresh corn varieties. The breeding method provided by the invention can create an excellent sweet waxy inbred line with high seed germination rate, good plant agronomic characters, strong resistance and high sugar content in grains; A corn variety with a grain sugar content of 14%. The sweet waxy corn selected by the method has significantly higher grain sugar content and taste quality than ordinary waxy corn, and the harvest period is longer than that of the sweet and waxy corn, which is suitable for fresh eating and quick-freezing processing.

Description

technical field [0001] The invention relates to the technical field of fresh-eating waxy corn, in particular to a method for breeding sweet and waxy-type fresh-eating corn varieties. Background technique [0002] Waxy maize (Zea mays L. certaina Kulesh) is a special type of maize formed by recessive mutation of the endosperm gene of common maize kernels (waxy mutation to waxy). Compared with ordinary corn, almost 100% of the starch contained in waxy corn kernels is amylopectin, which is rich in nutrients and has higher planting benefits. Waxy corn has become an important crop for adjusting the structure of my country's planting industry and increasing farmers' income. [0003] Waxy corn tastes sticky, soft and fragrant, but the sugar content in the grain is low. The sugar content of the grain in the milk-ripening stage (also expressed as Brix value, in percent) is generally about 8%, and the taste is not sweet. In order to meet the diversified needs of the market, my countr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01H1/02A01H1/04
CPCA01H1/02A01H1/04A01H5/10A01H6/4684
Inventor 赵久然卢柏山史亚兴徐丽
Owner BEIJING ACADEMY OF AGRICULTURE & FORESTRY SCIENCES
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