Breeding method and application of high-linoleic-acid maize inbred line

A high linoleic acid, inbred line technology, applied in the directions of application, botanical equipment and methods, plant genetic improvement, etc., can solve the problems of not significantly increasing the proportion of linoleic acid, high oil corn not being widely promoted and applied, etc. , to achieve the effect of improving economic efficiency

Inactive Publication Date: 2020-02-28
SUQIAN AGRI SCI RES INST JIANGSU ACAD OF AGRI SCI
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  • Application Information

AI Technical Summary

Problems solved by technology

Although high-oil (high-fatty acid) corn greatly improves the total energy level of corn grains, improves many of its nutritional components, and significantly increases the total fatty acid content of corn grains. The absolu

Method used

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Experimental program
Comparison scheme
Effect test

Example Embodiment

[0032] Example 1

[0033] 1) F1 was obtained by crossing Suyu 20 and Yunrui 21 and named SY12-1; the introduced inbred line K12 was used as the female parent with compact plant type, good male-male coordination, long ears, hard-grained type, and good resistance. SY12-1, a medium-dwarf, disease-resistant and large-eared hybrid SY12-1 was used as the male parent, and 2 F1 ears of the hybrid F1 were obtained to form the basic population S0;

[0034] 2) The harvested S0 generation basic seeds were irradiated with 60Co-γ rays with an irradiation dose of 200Gy and a dose rate of 1.52Gy / min to obtain a mutagenic population;

[0035] 3) All the irradiated seeds are planted and selfed as much as possible during the pollination period. The harvest period is divided into single ear numbers and harvested to obtain selfed S1 generation materials. Take 2-3g of seeds per ear, use gas chromatography to select high linoleic acid corn seeds with linoleic acid content of more than 60% in S1 generation...

Example Embodiment

[0038] Example 2

[0039] The hybrid combination SQ1817, prepared with YM-2 as the female parent and Chang 7-2 as the male parent, has been identified by Hainan and Jiangsu. It is resistant to high temperature, rust, and lodging. The growth period is 105 days. The plant type is semi-compact. Low position, resistant to high temperature in the powder-spreading stage, cylindrical ears, yellow and semi-hard kernels, total fatty acid content of 4.8%, linoleic acid content accounted for 61.5% of the average proportion of total fatty acids, higher than the control Su Yu 29, Zheng Dan 958, respectively The output reached 605.7Kg by 17.5% and 19.6%, which was an increase of 2.7% and 4.8% respectively compared with the control Suyu 29 and Zhengdan 958.

[0040] The present invention provides a method for breeding high linoleic acid corn inbred line and its application, by using the breeding method, an inbred line with a linoleic acid content of more than 60% in fatty acid can be selected and...

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Abstract

The invention provides a breeding method of a high-linoleic-acid maize inbred line and relates to the technical field of novel corn variety breeding. The breeding method is characterized in that by base population building and radiation mutagenesis which are combined with linoleic acid content detection, the high-linoleic-acid maize inbred line is bred through continuous selfing, and the linoleicacid content in the fatty acid of the offspring of the inbred line is allowed to exceed 60%. Continuous combining ability measurement of S4-S6 generations shows that the screened high-linoleic-acid maize inbred line YM-2 is excellent in comprehensive characters, the linoleic acid content in the fatty acid of the inbred line YM-2 reaches 61%, and the inbred line YM-2 is resistant to high temperature and Puccinia polysora Underw, high in stem rot, ostrinia nubilalis and viral disease resistance, medium in northern leaf blight and southern leaf blight and high in lodging resistance. Accordingly,by using the inbred line as the parent for hybridization, maize hybrids high in linoleic acid content can be cultivated, the nutrient content of common maize can be further increased, the value of thecommon maize serving as maize for feed or maize developed into healthcare food can be increased, and economic benefits can be increased.

Description

technical field [0001] The invention belongs to the technical field of breeding of new corn varieties, and in particular relates to a breeding method of high linoleic acid corn inbred lines. Background technique [0002] Corn kernels contain a variety of fatty acids, of which linoleic acid is the most abundant. Linoleic acid is an unsaturated fatty acid that is necessary for the human body but cannot be synthesized by itself in the body, and must be ingested from food. Many studies have shown that if the human body lacks linoleic acid, it will cause a series of cardiovascular and cerebrovascular diseases, such as high blood pressure, cerebral hemorrhage, heart disease, heart and brain blood thickening, hemiplegia and stroke. And linoleic acid can soften cardiovascular and cerebrovascular, promote blood circulation, reduce fat and blood pressure, promote metabolism, regulate endocrine and delay aging, etc., known as "vascular scavenger". [0003] At present, the content of ...

Claims

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Application Information

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IPC IPC(8): A01H1/04A01H1/02A01H1/06
CPCA01H1/02A01H1/04A01H1/06
Inventor 刘晓飞王卫军崔小平孙宝林
Owner SUQIAN AGRI SCI RES INST JIANGSU ACAD OF AGRI SCI
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