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High-efficiency corn variety circulation breeding method

A technology of corn and varieties, applied in the direction of botany equipment and methods, application, plant gene improvement, etc., can solve the problems of low efficiency and large cost of new varieties, and achieve the effects of improving efficiency, saving funds, and speeding up the progress of breeding

Inactive Publication Date: 2017-05-31
云南瑞禾种业有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a high-efficiency method for circular breeding of corn varieties, which solves the problems of low efficiency and large amount of money for cultivating new high-yielding corn varieties in the prior art

Method used

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Examples

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specific Embodiment 1

[0018] A kind of high-efficiency corn variety circular breeding method, comprises the following steps: a. Purposefully select the first group of female parents and the first group of male parents in the area; b. use the first group of female parents and the first group of male parents After the male parent is improved by crossing and 1-3 times of directional backcrossing, the improved early-generation line material is obtained; c. The improved early-generation line material is obtained through continuous self-crossing for 2-4 generations to obtain the basic material, and then select representative The backbone inbred lines with good general combining ability are tested by incomplete diallel hybridization with the basic materials; d. During the detection process of incomplete diallel hybridization, through the analysis of the planting process and yield measurement data, screen out the ones with good general combining ability The basic material is used as the target early generat...

specific Embodiment 2

[0021] This embodiment further illustrates the first group of female parents and the first group of male parents in step a on the basis of specific embodiment 1, the first group of female parents and the first group of male parents in the above step a The selection is based on the principle of defect complementation. The first group of female parents selects plants with high yield and good disease tolerance, and the first group of male parents selects plants with good disease resistance and good grain quality. The first group of female parents and male parents are the basis for breeding the second group of female parents and male parents. Therefore, when selecting the first group of female parents and first group of male parents, it is mainly to make up for the defects, so as to carry out directional backcross improvement It is more efficient and can make the improved materials show more comprehensive and excellent properties. High yield means that a single ear has more than 14...

specific Embodiment 3

[0023] This embodiment further illustrates the second group of female parents and the second group of male parents in step d on the basis of specific example 1. The second group of female parents in the above step d selects resistance qualified , low ear position, good plant type, large number of ear rows, and ear rot-resistant plants. The second group of male parents selected plants with excellent resistance, long ear length, good grain quality, well-developed tassels, and ear rot-resistant plants. The selection of the second group of female parents and male parents is also based on the principle of making up for defects, so that the hybrid offspring can have the excellent traits of both male and female parents. Low ear position means that the ear position is below the lower 1 / 3 of the plant. , and the good quality of the grain mainly means that the grain is hard or semi-hard.

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Abstract

The invention discloses a high-efficiency corn variety circulation breeding method. The method comprises the following steps: 1, selecting a first group of female parents and a first group of male parents in an area; 2, carrying out hybridization and 1-3 time directional backcrossing improvement on the first group of female parents and the first group of male parents to obtain an improved early selfing line material; 3, selfing the improved early selfing line for 2-4 generations to obtain a base material, selecting a representative key inbred line with good general combining ability, and carrying out incomplete diallel cross on the selected representative key inbred line and the base material; 4, screening a base material with good general combining ability through analysis, and selfing the screened base material used as a target early selfing line material for 4-6 generations to obtain a second group of female parents and a second group of male parents with good general combining ability; and 5, hybridizing the second group of female parents and the second group of male parents, respectively planting corn test cross combinations obtained through the hybridization in all regions, and carrying out yielding ability and disease resistance screening. The problems of low efficiency and large cost of high-yield corn cultivation in the prior art are solved.

Description

technical field [0001] The invention relates to the field of agricultural planting, in particular to a high-efficiency circular breeding method for corn varieties. Background technique [0002] Corn is one of the most widely distributed food crops in the world. Corn contains beneficial ingredients such as isomaltooligosaccharides, carotene, and plant fiber. Adequate intake of corn can not only prevent cancer but also benefit gastrointestinal health. Corn has the characteristics of low calories and can be used as a substitute for weight loss. Corn can not only be used as food and feed, but also has a wide range of uses in medicine, chemical industry and other fields. For example, alcohol produced from corn starch is a green and clean fuel. Facts have proved that people have a huge demand for corn, and its application prospects are broad. [0003] At present, with the continuous increase of the population, consumers' demands for meat, eggs, and milk are also increasing year b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01H1/04A01H1/02
CPCA01H1/04A01H1/02
Inventor 岳祯钧
Owner 云南瑞禾种业有限公司
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