Technical method for continuous improvement of corn single cross hybrid

A single-crossing and technology technology, applied in the direction of plant genetic improvement, botanical equipment and methods, applications, etc., can solve the problems of difficult to control the breeding effect, difficult to focus on breeding goals, etc., achieve significant improvement effect, reduce breeding costs and The effect of variety promotion risk and strong competitive advantage

Active Publication Date: 2014-09-10
HENAN AGRICULTURAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a method for constructing a recurrent population with excellent single-cross parent sister lines for the problems that the breeding targets are not easy to concentrate and the breeding effect is not easy to control in the previous maize breeding methods. , the selection effect is easy to control, not only applicable to the improvement of comprehensive traits of single-cross species and their parent populations, but also very effective in the improvement of a certain trait

Method used

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  • Technical method for continuous improvement of corn single cross hybrid
  • Technical method for continuous improvement of corn single cross hybrid
  • Technical method for continuous improvement of corn single cross hybrid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] In this example, the comprehensive traits of the maize single-cross Yudan 603 were improved.

[0019] In this example, the two parent materials of Yudan 603, an excellent single-cross maize variety, were used as the research object, and the commercially available Yudan 603 (original single-cross variety) was used as the control species to improve the comprehensive traits of Yudan 603 and its two parents. The female parent of Shan 603 had fewer panicle rows and larger grains, which affected the benefit of seed production and improved the number of panicle rows.

[0020] The specific operation steps are as follows:

[0021] Firstly, the basic population of two parents of Yudan 603 was constructed. According to comprehensive traits such as insect resistance, disease resistance, lodging resistance, fruitiness, greenness, and agronomic traits, excellent single panicles were selected from the single-propagation fields of the two parents, and the middle grains of the single p...

Embodiment 2

[0052] In this example, the comprehensive traits of the maize single-cross Yudan 608 were improved.

[0053] In this example, the two parent materials of the excellent single-cross maize Yudan 608 were used as the research object, and the commercially available Yudan 608 (the original single-cross variety) was used as the control species, and the comprehensive traits of Yudan 608 were improved by uplifting.

[0054] The specific operation steps are as follows:

[0055] Firstly, the basic population of two parents of Yudan 608 was constructed. According to comprehensive traits such as insect resistance, disease resistance, lodging resistance, fruitiness, greenness, and agronomic traits, excellent single panicles were selected from the single-propagation fields of the two parents, and the middle grains of the single panicles were mixed to form their respective basic groups. That is, the paternal basic population MC0 and the maternal basic population FC0;

[0056] Secondly, the...

Embodiment 3

[0075] In this example, a single trait is improved.

[0076] This example includes the improvement of comprehensive traits and single traits of maize single-cross Yudan 603 and its parent populations. The invention is not only effective for the improvement of comprehensive traits of two-parent populations and hybrid combinations, but also effective for the improvement of certain traits of two-parent populations or single-cross species. The female parent material of Yudan 603 has incomplete development of grain and pericarp. In the present invention, the development of grain and pericarp is taken as the target trait in each seed selection and identification process. In the process of obtaining the seeds of the female parent material every time, the ears with less developed pericarp and less kernels are purposely selected, and the incomplete pericarp and kernels are eliminated during threshing. For example, in the process of obtaining the seeds of the improved population of the...

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Abstract

The invention discloses a technical method for continuous improvement of corn single cross hybrid. The method comprises the following steps: respectively selecting excellent individual plants from base population aiming at characters needing to be improved; planting the individual plants into panicle rows in the next season, performing selfing on superior plants in the panicle rows, and performing test cross on each excellent male parent panicle row and each excellent female parent panicle row; performing yield and improved character contrast test on the test cross combination and original single cross hybrid; planting the combined parent selfing clusters with excellent characters into panicle rows according to the identification result, carrying out mixed pollinating on the two parent cluster excellent panicle rows according to a one-superior-female parent multi-superior-male parent mode, mixing middle seeds of the clusters obtained by mixed pollinating so as to form a novel base population to enter the selection in the next selection. The technology has target concentration and can be applied to improvement of the comprehensive characters or single character of corn single cross hybrid and single cross hybrid parent population due to continuous cyclical selection, the yield is increased by over 5 percent compared with that of the original single cross hybrid, and the other comprehensive characters are obviously improved compared with those of the original single cross hybrid.

Description

technical field [0001] The invention belongs to the technical field of corn breeding, and is an interactive recurrent selection technical method for uninterrupted improvement of excellent single-cross corn varieties in the "post-breeding stage". Background technique [0002] Maize is an important food crop in my country, and excellent maize varieties are one of the key factors affecting the high and stable yield of maize. In my country, there are many maize hybrid varieties approved by the state and provincial level every year, but there are not many maize varieties with excellent comprehensive properties, high yield, stable yield, multi-resistance, wide adaptability, and high seed production efficiency, which can be widely promoted in production There are even a small number of corn varieties. Some varieties have been active in the market for 2-3 years and then disappeared, and some have even been eliminated without promotion. The main reasons for this phenomenon are as fol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01H1/02A01H1/04
Inventor 李潮海李鸿萍董朋飞杨春收孙启杰宋航杨艳
Owner HENAN AGRICULTURAL UNIVERSITY
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