Breeding method for maize inbred line high and low generations

A technology for inbred lines and maize is applied in the field of high and low generation selection of maize inbred lines, which can solve the problems of reducing dominant potential and stress resistance, difficult to make breakthroughs in bred varieties, lack of basic materials for breeding, etc. Excellent character, suitable for mechanized operation, low ear position

Inactive Publication Date: 2016-08-03
RES INST OF GANSU DUNHUANG SEED CO LTD
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Insufficient germplasm improvement and innovation, low investment in medium and long-term corn breeding goals, and lag in development have resulted in a lack of basic breeding materials and a narrow genetic basis, reducing the potential for further improvement of heterosis and stress resistance, making it difficult to make major breakthroughs in bred varieties

Method used

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  • Breeding method for maize inbred line high and low generations
  • Breeding method for maize inbred line high and low generations

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Experimental program
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Effect test

Embodiment 1

[0015] The breeding method of the high and low generations of the corn inbred line of the present embodiment comprises the following steps:

[0016] 1. Hybridizing the corn variety 5599 with 6WC to obtain the F1 generation of hybrid ears;

[0017] 2. In the F1 generation, 5 ears of ear samples were collected, and the rest were self-crossed to obtain the F2 generation;

[0018] 3. In the 5 ear rows of the F2 generation, 5 ears are taken in each ear row to obtain 25 ears;

[0019] Four, get 5 fringes of fringes of F1 generation in step 2 and 25 fringes of fringes of F2 generation in step 3 and carry out hybridization, obtain 125 F3 generation high and low generation sisters cross fringe;

[0020] 5. Combine the 125 ears obtained in step 4 with a ripening period of 115 days, number of rows of ears at 16 rows, lodging resistance reaching grade 3, resistance to leaf spot disease within 3, and seeding rate reaching more than 80% to select a single plant, Continuous selfing for 4 g...

Embodiment 2

[0022] The method of breeding high and low generations of corn inbred lines in this example is different from Example 1 in that the screening conditions in step five are that the maturity period is 118 days, the number of ear rows is 14 rows, and the lodging resistance reaches 3 Grade, resistance to leaf spot disease within 3, seed yield over 80%; continuous selfing for 5 generations.

Embodiment 3

[0024] The corn seeds obtained in Examples 1 and 2 were sown in spring in the early maturing area of ​​Northeast China during the growth period, about 115 days, the seedling sheaths were purple, the leaves were dark green, and the early onset was extremely strong, the average plant height was 175 cm, the ear position was 60 cm, and the plant type Compact, tough stems, upward thrusting leaves, medium tassel branches, purple anthers, pink filaments, average ear length 17 cm, ear diameter 5.1 cm, number of ear rows 12-14 rows, red cob, average number of grains per row 38 grains, weight of 100 grains 31 grams, long stalk of ear, simple ear, orange-yellow grain, half-dent shape, seed yield 84%. Field performance: resistance to large and small leaf spot, head smut, sheath blight, rough shrinkage and other diseases. Due to the combination of the advantages of different sources and types of corn, the selected inbred lines have wide adaptability, strong stress resistance and are suitab...

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Abstract

The invention relates to a method for breeding high and low generations of maize inbred lines, which relates to a method for obtaining improved varieties by hybridization, in particular to a method for obtaining new maize inbred lines for cycle improvement. Its purpose is to provide a method for breeding high-quality corn with good resistance. The method for breeding high and low generations of corn inbred lines of the present invention comprises: crossing corn variety 5599 with 6WC to obtain F1 generation; then self-crossing to obtain F2 generation; crossing 5 ears of F1 generation with 25 ears of F2 generation to obtain 125 F3 generations Sister crossed ears, the F3 generation was continuously selfed and screened to obtain improved varieties. The breeding method of the invention ensures that the prepared hybrid has the characteristics of good quality, strong stress resistance, wide adaptability and good commerciality. The invention is used in the field of breeding of new varieties of crops.

Description

technical field [0001] The present invention relates to a method for obtaining improved maize inbred lines by means of hybridization, in particular to a combination of high coordination in which one of the parents still has some small defects, and is used to carry out two inbred lines in the same group. Ring selection improves the hybridization method to obtain new varieties of maize. Background technique [0002] Due to the selection and breeding of excellent corn varieties, it is difficult to have sustainability. The lack of basic materials and the narrow genetic basis make it difficult to make major breakthroughs in breeding. Insufficient germplasm improvement and innovation, low investment in medium and long-term corn breeding goals, and lag in development have resulted in a lack of basic breeding materials and a narrow genetic basis, reducing the potential for further improvement of heterosis and stress resistance, making it difficult to make major breakthroughs in bre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01H1/02A01H1/04
CPCA01H1/02A01H1/04
Inventor 姜一新闫治斌马世军闫富海秦嘉海王学李世凤马明帮
Owner RES INST OF GANSU DUNHUANG SEED CO LTD
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