Breeding method of corn hybrids

A hybrid and corn technology, which is applied in the fields of botanical equipment and methods, application, and plant genetic improvement, can solve the problems of high grain water content, late maturity, and unsuitable grain machine harvesting.

Active Publication Date: 2021-07-09
DRY LAND FARMING INST OF HEBEI ACAD OF AGRI & FORESTRY SCI
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Problems solved by technology

[0004] The Huang-Huai-Hai area adopts a wheat-corn planting pattern of two crops a year. The effective accumulated temperature of summer corn in the northern part of the Huang-Hui-Hai area is insufficient, the grain water content is high, and it has not reached physiological maturity; with the

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Embodiment Construction

[0036] The structure and application principle of the method for breeding corn hybrids of the present invention will be further described in detail below in conjunction with specific embodiments.

[0037] The technical scheme adopted in the breeding method for the invention of corn hybrids is:

[0038] The method includes the following steps:

[0039] The first step is to establish heterosis group and heterosis model

[0040] The domestic backbone inbred line Qi 319 was crossed with Ye 81162, and the pedigree method was used to select the optimal line for 6 generations of self-crossing, and the inbred line Heng H1027 was bred, which belonged to PB group × Red group, and was divided into A group.

[0041] The introduced inbred line PH4CV mutant was backcrossed with PH4CV, and the inbred line Heng HC705 was bred after 5 generations of self-crossing. The heterosis group pedigree was divided into the Iodent group, which belonged to the male parent group B;

[0042] In the second...

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Abstract

The invention belongs to the technical field of corn hybridization, and discloses a breeding method of corn hybrids. The method is mainly technically characterized by comprising the following steps: firstly, establishing a heterosis group and a heterosis mode, hybridizing a public selfing line Q319 and a local germplasm 81162, adopting a pedigree method, conducting selfing for six generations, selecting a superior line, cultivating a selfing line Heng H1027 which belongs to a PB group*Reid group, dividing the selfing line Heng H1027 into a group A, introducing a selfing line PH4CV variant to backcross with PH4CV, then conducting selfing for five generations to breed a selfing line Heng HC705, and dividing a pedigree of the heterosis group into an Iodent group which belongs to a male parent group B; performing test-matching and grouping on a newly introduced germplasm material, then performing line selection, then carrying out circulating line selection, enabling F1 generation inheritable characters to be stable, carrying out selfing or improved line backcrossing on single plants, and realizing segregation of F2 or BC1 generation characters; and planting ear rows in the F3 generation, performing phenotype selection and inter-group test-matching rotation selection on the segregated ear rows and individuals, and finally obtaining the new corn hybrid variety. The method has the advantages of early maturity, short stems, lodging resistance and suitability for mechanical grain harvesting.

Description

technical field [0001] The invention belongs to the technical field of corn breeding, in particular to a method for breeding corn hybrids. Background technique [0002] Maize is a cross-pollination crop. The combination of one type of maize inbred line with another type of inbred line often has good heterosis, while the heterosis among inbred lines within the group is weak. This type of inbred line The system is called a heterosis group, and two heterosis groups with heterosis are collectively called a heterosis pattern. The heterosis pattern is artificially formed by the breeders through circular improvement in order to make better use of germplasm and heterosis. [0003] Corn is the largest crop in my country, and ensuring food security is the country's largest strategic demand. Food security depends on the seed industry, and fine varieties are the basis for high yields of corn. The introduction and research of maize in my country is relatively late, the germplasm base ...

Claims

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Application Information

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IPC IPC(8): A01H1/02A01H1/04
CPCA01H1/02A01H1/04
Inventor 陈淑萍卜俊周谢俊良岳海旺魏建伟彭海成
Owner DRY LAND FARMING INST OF HEBEI ACAD OF AGRI & FORESTRY SCI
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