Method for enabling sexual corns to generate dominant and recessive apomictic hybrids

A technology of apomixis and hybrids, which is applied in the directions of botanical equipment and methods, applications, and plant genetic improvement, and can solve problems affecting the process and effect of cultivating non-segregating hybrids, affecting dominant apomictic hybrids, etc.

Inactive Publication Date: 2014-11-19
NORTHWEST A & F UNIV
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  • Application Information

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Problems solved by technology

Since the autonomous seed-setting rate of apomicts and the combining ability between them and sexual maize can affect ...

Method used

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  • Method for enabling sexual corns to generate dominant and recessive apomictic hybrids
  • Method for enabling sexual corns to generate dominant and recessive apomictic hybrids
  • Method for enabling sexual corns to generate dominant and recessive apomictic hybrids

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Embodiment Construction

[0010] Use 4317 non-fusion corn as the male parent, and plant it adjacent to the sexual corn with white cobs, Chang 72, 7131, 7132, 478 and 7133 with red cobs as the female parent, and spin silk on the female parent Before, it is isolated and bagged, and the male parent also bags its tassels the day before pollination. When the female parent's ear is spinning, pat the male parent's tassel at 9-11 in the morning or 3-5 in the afternoon. The pollen was collected by bagging, sprinkled on the ear, and then continued to be bagged in isolation, so that the pollination was performed twice in a row. After maturity, the ear of the female parent was collected, dried, and threshed for storage, thereby producing F0 generation seeds of each combination. Plant the F0 generation seeds of each combination. In the F1 population, it can be seen that the female ears are dominant apomictic hybrids and sexual hybrids with white cobs capable of self-fertilizing and the female ears are dominant apomi...

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Abstract

The invention discloses a method for enabling sexual corns to generate dominant and recessive apomictic hybrids. Red spike-stalk self-fruited 4317 facultative apomict corns serving as a male parent are hybridized with sexual corns chang 72, 7131, 7132 and 478 of which white spike-stalks cannot be self-fruited and sexual corns 7133 of which red spike-stalks cannot be self-fruited; F1 can generate dominant apomictic hybrids of which the white spike-stalks can be self-fruited and sexual hybrids of which the red spike-stalks cannot be self-fruited as well as dominant apomictic hybrids of which red spike-stalks can be self-fruited and sexual hybrids of which the red spike-stalks cannot be self-fruited; after the sexual hybrids are subjected to selfing, F2 can separate out recessive apomictic hybrids of which light red spike-stalks or red spike-stalks can be self-fruited after the selfing of sexual hybrids. The dominant apomictic hybrids are high in self-fruiting rate, and generations cannot be separated; the dominant apomictic hybrids are main male parents for cultivating unseparated hybrids; the recessive apomictic hybrids are relatively low in self-fruiting rate and relatively poor in purity, and can be also used as basic materials for cultivating the unseparated hybrids through planting separation.

Description

technical field [0001] The invention belongs to the technical field of maize apomictic breeding, in particular to a method for producing dominant and recessive apomictic hybrids in sexual maize. Background technique [0002] The fundamental goal of maize apomixis breeding is to breed non-segregating hybrids so that they can use the function of heterosis to reach the level of fixed heterosis. The main method of breeding non-separating hybrids is to use apomictic and sexual maize hybrids first, then select excellent dominant apomictic hybrids in each generation, and then repeatedly cross with sexual parents until the apomictic characteristics and A dominant apomictic hybrid with excellent agronomic traits. Since the autonomous seed setting rate of apomicts and the combining ability between them and sexual maize can affect the level of dominant apomictic hybrids, it will inevitably affect the process and effect of breeding non-separating hybrids. Therefore, research on the me...

Claims

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Application Information

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IPC IPC(8): A01H1/02
Inventor 董安书
Owner NORTHWEST A & F UNIV
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