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Method for selecting and breeding corn new-bred through hybridized induction of unisexual seeding material

A technology of parthenocarpy and hybridization, which is applied in the direction of botany equipment and methods, application, plant gene improvement, etc., to achieve the effects of good comprehensive agronomic traits, easy identification, and eliminating the process of self-purification

Inactive Publication Date: 2006-10-11
JILIN ACAD OF AGRI SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, they cannot be obtained and utilized because they are patented or kept in a state of secrecy, so breeding new high-frequency induction lines is a prerequisite for this work

Method used

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  • Method for selecting and breeding corn new-bred through hybridized induction of unisexual seeding material
  • Method for selecting and breeding corn new-bred through hybridized induction of unisexual seeding material

Examples

Experimental program
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Effect test

Embodiment 1

[0026] In 2004, the foreign hybrid X1132P with high yield and excellent comprehensive traits was pollinated by using the parthenogenic induction line Jigaoyin Line 3 as the male parent. Normal hybrid diploid grains; while the aleurone layer at the top is purple, the germ tip is colorless, and the germ surface is small, triangular in shape, and deeply depressed, it is the "haploid" X1132P parthenocarpy induced "Grains; A total of 1023 "haploid" grains were obtained according to the above markers.

[0027] In 2005, the selected "haploid" grains were carefully sown, and 693 plants emerged. The jointing stage was further confirmed according to the growth of the seedlings, plant height, leaf length, leaf sheath (sheet) color, and leaf angle. The haploid seedlings grow slowly, the plant height is low, the plants are thin, the leaves are short and relatively upward, and the leaf color is light; the diploid seedlings grow strong, the plants are tall and the leaves are hypertrophic, an...

Embodiment 2

[0030] In 2003, the “Huangzao Four Groups” was selected as the backbone germplasm of domestic maize (in 2001, there were 13 Huangzao four populations including j853, Chang7-2, Si444, 773-2, K12, K14, Zhe461, H23, etc. The population synthesized by cross-line artificial mixing) is the basic material for line selection, and the pollen of No. 3 Jigaoyu line is used to pollinate it. Marker traits such as triangle shape and deep depression were identified, and 732 "haploid" grains were obtained.

[0031] In 2004, the selected "haploid" seeds were sown finely, and 471 plants emerged. At the jointing stage, 423 haploid plants were further confirmed according to the growth of seedlings, plant height, leaf length, and leaf color. 36 diploid or double haploid plants were obtained through natural doubling, and 13 self-fertilized fruit ears.

[0032]In the winter of 2005, three new inbred lines were added in Hainan, and the selected offspring showed uniform performance and good comprehen...

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Abstract

The invention discloses a method for breeding new corn strain by cross inducing parthenocarpy material, belonging to the crop breeding field. The invention mainly uses the Jigao inductive line No. 3, which can cross inducing with high frequency parthenocarpy to generate autocopulative line, to induce following generation to generate haploid after the corn group or hybrid pollination, then forms stable autocopulative line through natural or artificial duplication with haploid. Compared with normal method, the invention is characterized by the simplified breeding process, shortened time, increased efficiency, and autocopulative line of high purity.

Description

technical field [0001] The invention relates to a method for crop breeding, in particular to a method for breeding new varieties of corn by using hybridization-induced parthenocarpy materials. Background technique [0002] Maize breeding is a cyclical and long-term work. Generally, it takes 10-15 years to breed a variety. Not only is the workload heavy, time-consuming and laborious, but it may also take too long. After hard work, the results often do not meet the requirements of the market. Therefore, how to shorten the breeding time and speed up the breeding speed has always been the goal that breeders are striving to pursue. Many methods have been proposed for this purpose, such as using anthers or pollen to cultivate haploids, and then doubling them into inbred lines can greatly shorten the breeding period. , used to be a method with great hope, but it is difficult to be widely used in practice due to the difficulty of anther culture, complicated technology and unsatisfa...

Claims

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Application Information

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IPC IPC(8): A01H1/02A01H1/04A01H1/08
Inventor 才卓徐国良刘向辉董亚琳代玉仙李淑华任禾张志强林志高海
Owner JILIN ACAD OF AGRI SCI
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