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Method for breeding inbred line based on corn Suwan-Iodent population

An inbred line and group technology, applied in the field of inbred line selection, can solve the problems of high cost, shortening the flowering period of parental tunes, and difficulty in southern corn seed production, with strong purpose, strong operability, and obvious advantages Effect

Pending Publication Date: 2021-06-25
贵州省旱粮研究所
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Problems solved by technology

[0005] The purpose of the present invention is to provide a method for breeding inbred lines based on the Suwan-Iodent population of corn, so as to solve the deficiencies in the existing technology such as difficult seed production and high cost of southern corn; the method is practical and simple to operate , low cost, strong pertinence, and obvious industrialization effect, shorten the flowering period of parental tune, increase seed yield, provide greater profits for seed industry enterprises and provide farmers with high-quality seeds

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  • Method for breeding inbred line based on corn Suwan-Iodent population

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Embodiment 1

[0023] A method for breeding inbred lines of a new corn Suwan-Iodent population, comprising the following steps:

[0024] Step 1: Group cutting of seedlings and selection of environmental stress: plant about 30,000 plants in the original Suai C0 population, with a density of 8,000 plants / mu, and apply stress such as drought and no fertilization after emergence to the flowering stage to delay the flowering stage , lower plants and other adverse reactions. Through different leaf stages, artificially cut off the first leaf above the ground to create stress and make it destroy the growth potential of corn plants. It is found that the seedlings are cut at the 4-6 leaf stage of corn, and the flowering-pollination stage is basically the same , strong male and female coordination, the comprehensive evaluation is level 3, and the parental control (DK517F) is managed normally in the field. At the flowering stage, select excellent individual plants from the S1 population of maize, and p...

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Abstract

The invention discloses a method for breeding an inbred line based on a corn Suwan-Iodent population. The method comprises the following steps: cutting seedlings of the population and selecting seedlings according to environmental stress pressure; conducting multi-environment remote identification and selection; obtaining a test cross variety by adopting an incomplete dicolumn hybridization design; conducting field identification; analyzing a heterosis mode; and evaluating and analyzing hybrid yield and field multipoint phenotypes, and breeding a selfing line. The method effectively solves a group photosensitivity of Suwan-Iodent corn, hasobvious advantages, strong operability and strong purposivenesscompared with the existing breeding method, particularly well solves a problem of photosensitivity selection of a tropical material in step one of cutting seedlings of the population and selecting seedlings according to environmental stress pressure, and provides a good possibility for utilization in a temperate zone.

Description

technical field [0001] The invention relates to a method for breeding an inbred line based on a corn Suwan-Iodent population, belonging to the technical field of crop breeding. Background technique [0002] At present, the homogeneity of maize varieties is serious and the germplasm base is very narrow, resulting in the production of tens of millions of hectares of crops relying on a narrow genetic base, while suffering from a variety of diseases and insect pests; Improvement is difficult to overcome disadvantages under the premise of retaining advantages, which makes it difficult to make breakthroughs in selected hybrid combinations, resulting in serious homogeneity of varieties in production. The introduction, identification, improvement and utilization of foreign germplasm is one of the most effective ways to broaden the current germplasm base. Breeding practice in the past 40 years has proved that tropical maize germplasm resources have made great contributions to the de...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01H1/00A01H1/02A01H1/04
CPCA01H1/00A01H1/02A01H1/04
Inventor 郭向阳陈泽辉吴迅祝云芳王安贵刘鹏飞
Owner 贵州省旱粮研究所
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