Method for increasing 3-4 generations of winter wheat filial generation in one year by utilizing climatic conditions

Abstract

The invention discloses a method for increasing 3-4 generations of winter wheat filial generation in one year by utilizing climatic conditions. The method comprises the steps of: firstly carrying out dormancy breaking treatment on current-generation hybrid F0, breeding in field while shielding with 1-2 layers of sunshade nets, harvesting to obtain F1 generation, carrying out pot culture on seeds F1 in outdoor natural conditions, breeding with potted seeds F1 to obtain seeds F2 generation, breeding with the wheat seeds F2 generation to obtain seeds F3 generation, and finally breeding with the seeds F3 generation in peak with elevation of 1500m in north to obtain wheat seeds F4 generation. By adopting the steps, 4 generations are increased within a year and a half, the investment is low and the cost is low, thus a new way is explored for routine breeding, in-situ generation increasing and rapid planting of the wheat.

Description

technical field [0001] The invention belongs to the agricultural breeding method, especially the field of combining crop breeding and agricultural meteorology, and relates to crop cultivation. Background technique [0002] Winter wheat hybrid breeding is a widely used and effective breeding method recognized at home and abroad. Winter wheat is a self-pollinating crop, but in general, the natural outcrossing rate is 1-8%, that is, the same variety is grown in a large amount during the planting process. Part is self-pollination, only 1-8% of cross-pollination, cross-pollination will produce variation, and then produce heterosis. In order to obtain the heterosis of wheat, it is necessary to remove the pollen (castrate) from one of the wheat parents (A) and cross it with another wheat parent (B). or A×B). The wheat hybrid seeds obtained in that year are hybrid contemporary, denoted by F1. The seeds of F1 are planted again in the second year, and the seeds produced are the sec...

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Problems solved by technology

[0003] There are deficiencies in this breeding method. First, the breeding time is long. Second, the investment in scientific research is relatively large. Third, the varieties will be artificially mixed in multi-year planting. This is often costly and the number of times of addition is small, and this method of addition has certain technologies in the cold north, so it cannot be implemented smoothly

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