Production method for hybrid wheat seed

A technology of hybrid wheat and seeds, which is applied in the direction of botany equipment and methods, applications, plant genetic improvement, etc., can solve the problems of large amount of wheat seeds used, difficult production and acceptance of hybrid wheat seeds, etc., and achieve the effect of cost reduction and cost saving

Inactive Publication Date: 2002-06-19
NORTHWEST A & F UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The amount of wheat seeds used is large, and high-priced hybrid wheat seeds are difficult to be accepted by production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Embodiment 1, taking the three-line seed production system as an example.

[0048] (1) Select the hybrid wheat combination that meets the requirements of mixed seed production. F produced by K7664A / R205 1 The first generation hybrid combination "905". The plant height of the male sterile line K7664A is 75cm, the plant height of the male restorer line R205 is 90cm, and the male parent is 15cm taller than the female parent; the male sterile line K7664A is 5-6 days earlier in heading and 2-4 days earlier in flowering than the restorer line R205; F 1 The plant height of the generation is 86cm-88cm, only 4cm-6cm shorter than the restorer line; F 1 Many years of multi-point experiments in the northern spring wheat area, the heterosis is obvious, with an average yield increase of 18% to 25%.

[0049] (2) "905" hybrid wheat seed production is carried out in the spring wheat area of ​​the Liaoxi Plain in China, and the suitable planting density is 200,000 seedlings / mu. Calc...

Embodiment 2

[0058] Embodiment 2, taking the two-line hybrid wheat seed production system as an example.

[0059] (1) According to the combination selection requirements of mixed seed production, the hybrid wheat combination "991" produced by the temperature-sensitive male sterile line A691 / R169 was selected to produce hybrid wheat seeds for mixed seed production. CMS line A691, very precocious, plant height 70cm, restorer line R169 heading 8 days later than A691, flowering 4-5 days later, plant height 10cm higher than A691; combination "991" F 1 The plant height of the first generation is 82cm, which is only 2cm higher than that of the restorer line; the yield advantage of the first generation hybrid is more than 20%, and it is disease-resistant and early-maturing.

[0060] (2) The "991" combination was sown in autumn in the Huanghuai winter wheat region for seed production. The planned basic seedlings per mu are 120,000. The seed weights of sterile lines and restorer lines needed for m...

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PUM

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Abstract

The method for producing hybride wheat seed is characterized by that when it utilizes the hybridization of wheat to produce hybride one-generation seed, it adopts the combination of restoring line and sterile line, in which they are sown in same period, well met in flowering season, restoring line plant is 10 cm-20 cm higher than sterile line plant. The height difference of F1 generation and restoring line plant does not exceed 10 cm, and mixing them according to the ratio of sterile line seed and restoring line seed of 8.5:1.5 and planting them to form mixed population, in which the sterile line is pollinated by restoring line in flowering season to produce hybride one-generation seed. The restoring line can be self-hybridized to produce restoring line seed. The harvest adopts two emthods: (1). mix-harvesting production seed containig 80-90% of F1 generation seed and 10%-20% of storing line self-hybridized seed, it can reduce production cost; and (2) after flowered for 15-20 days, manually exterminating restoring line ear from mixed population, and producing pure hybride one-generation seed.

Description

[0001] 1. Field [0002] The invention relates to the field of wheat heterosis utilization of food crops, and further relates to a hybrid wheat seed production method. 2. Background technology [0003] Wheat is one of the most important food crops for humans. A large number of studies have proved that wheat, like rice, corn, rapeseed and other crops, has significant heterosis in the first generation of hybrids. It is of great economic significance to use heterosis to improve wheat production level. [0004] In order to produce wheat hybrid seeds on a large scale, more than 70 types of male sterile three lines of wheat have been bred in various countries since the 1960s, among which T type and K type are widely used in research. However, production practice has proved that the use of sterile lines and maintainer lines to produce sterile lines has low seed yield, high cost, and difficulty in maintaining purity, which have always limited the wide application of the three-line m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01H1/02
Inventor 何蓓如宋喜悦
Owner NORTHWEST A & F UNIV
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