Hybrid seed production method for nitrogen efficient maize

A hybrid and corn technology, applied in the direction of botany equipment and methods, applications, plant gene improvement, etc., can solve the problems of nutrient stress tolerance and high nutrient efficiency germplasm that have not been fully developed and utilized

Inactive Publication Date: 2011-06-29
CHINA AGRI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

As far as nutritional traits are concerned, since the high-yield breeding process has generally been carried out under the condition of satisfying nutrients for a long time, most of the selected varieties

Method used

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  • Hybrid seed production method for nitrogen efficient maize
  • Hybrid seed production method for nitrogen efficient maize
  • Hybrid seed production method for nitrogen efficient maize

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0138] Embodiment 1, the preparation of nitrogen double high-efficiency hybrid

[0139] 1. Screening nitrogen-efficient maize inbred lines as parents

[0140] (1), parent screening method:

[0141] The corn inbred lines to be screened are planted under low-nitrogen and high-density conditions, and the planting management methods are as follows:

[0142] Fertilization treatment - nitrogen fertilizer is 45kg N / hm 2 , phosphate fertilizer is 100kg P 2 o 5 / hm 2 , potash fertilizer: 100kg K 2 O / hm 2 . All fertilizers were applied as base fertilizer at one time. The planting density is 100,000 plants / ha, and the row-to-plant spacing is adjusted according to the actual situation (you can choose a row-to-plant spacing of 60 cm and a plant-to-plant spacing of 17 cm; or a row-to-plant spacing of 50 cm and a plant-to-plant spacing of 20 cm).

[0143] (2) Screening criteria for parents:

[0144] Select an inbred line that meets at least one of the following conditions I, II and...

Embodiment 2

[0270] Embodiment 2, the preparation of high-nitrogen high-efficiency hybrid

[0271] 1. Maternal Screening

[0272] Xiyu 3 was continuously selfed for 8 generations, and the inbred lines obtained in each generation were planted according to the following method, and then screened according to the parental screening criteria in step 1 (2) of Example 1.

[0273] Planting management method: fertilization treatment - nitrogen fertilizer is 45kg N / hm 2 , phosphate fertilizer is 100kg P 2 o 5 / hm 2, potash fertilizer: 100kgK 2 O / hm 2 . All fertilizers were applied as base fertilizer at one time. The planting density is 100,000 plants / ha, and the row-to-plant spacing is adjusted according to the actual situation (you can choose a row-to-plant spacing of 60 cm and a plant-to-plant spacing of 17 cm; or a row-to-plant spacing of 50 cm and a plant-to-plant spacing of 20 cm).

[0274] As a result, the target inbred line meeting the screening criteria was obtained, which was used ...

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Abstract

The invention discloses a hybrid seed production method for nitrogen efficient maize, which comprises the following steps of: selecting maize inbred lines shown as (1), (2) and (3) as a parent strain; hybridizing to obtain an F1 generation; selecting the maize F1 generation meeting the conditions shown as A, B and C to obtain a target new maize combination (or a new variety). By the method disclosed by the invention, a new maize variety is obtained, the utilization efficiency of nitrogen is improved, and the yield is obviously increased compared with a contrast. Therefore, the method disclosed by the invention is favorable for increasing the breeding efficiency of a new maize nitrogen efficient variety, and has a broad application prospect in the field of maize breeding.

Description

technical field [0001] The invention relates to a method for hybrid seed production of nitrogen-efficient corn. Background technique [0002] Corn is an important feed, economic and bioenergy crop, and its demand at home and abroad is increasing day by day. With population growth and economic development, my country's food demand will continue to show continuous rigid growth. To achieve China's food security in 2030, the total output must increase by more than 40% on the current basis, and the per unit yield must increase by more than 45%, that is, the average annual growth rate must reach 2.0%. Therefore, achieving sustained and stable increases in grain production and ensuring national food security are major tasks for my country's agriculture at present and for a long time to come. Corn, an important food resource, is playing an important role. [0003] High-yielding nitrogen-efficient varieties are one of the important ways to solve my country's food security, resourc...

Claims

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Application Information

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IPC IPC(8): A01H1/02A01G1/00
Inventor 陈范骏米国华张福锁袁力行顾日良
Owner CHINA AGRI UNIV
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