Off-site generation-adding breeding method for winter wheat

Abstract

The invention provides an off-site generation-adding breeding method for winter wheat. The method comprises the following steps: A, sowing winter wheat seeds of the Nth generation in a field in a Huanghuai wheat zone in early-to-mid October of the first year, and digging out seedlings with roots after natural vernalization; B, transplanting the seedlings with roots dug out in the step A to a field in Hainan province, conducting strain selection according to a breeding target, and harvesting seeds of the (N+1)th generation after the seedlings are mature; C, in the next year, sowing the seeds of the (N+1)th generation in a field of Liaoyuan region in ice crust, conducting strain selection according to the breeding target, and harvesting the seeds of the (N+2)th generation after wheat is mature in mid-to-late July; and N is a natural number. According to the method disclosed by the invention, one-year-one-generation of traditional breeding is easily changed into one-year-two-generation of breeding, the breeding age limit is shortened, and the breeding efficiency is improved; and the method is mainly embodied in that 1) the method is simple, rapid and economical, low in technical difficulty, free of special facilities, simple and feasible, and less manpower and material resources are required; 2) the generation-added plants do not need artificial low-temperature vernalization, and the operation is simple and convenient;.

Description

technical field [0001] The invention belongs to the field of crop breeding, and in particular relates to a method for additional breeding of winter wheat in different places. Background technique [0002] Wheat is one of the staple foods of human beings and is widely planted in the world. With the growth of population and the continuous improvement of living standards, the demand for wheat continues to increase. Winter wheat in the Huanghuai winter wheat area is a crop that grows across the year, with a long growth period, during which it undergoes low-temperature vernalization and light periods before it can normally flower and set fruit. Generally, only one generation can be planted and selected each year. Wheat conventional cross-breeding is a method to obtain target materials by crossing the combination of parents and selecting the separated offspring. It usually takes about 8 years for winter wheat conventional cross-breeding to select stable lines. The previous genera...

AI Technical Summary

Problems solved by technology

The traditional off-site supergeneration of winter wheat is directly sown in off-site, and the seeds are planted and harvested. Before sowing, the seeds need to be broken from dormancy or vernalized. For the existing winter wheat plants that are multi-generational and multiplied in Hainan, the harvested seeds are usually planted in the local area after vernalization. Or in different places, in this case, the seeds are difficult to tiller, or there are few tillers, the growth and development are affected to a certain extent, it is difficult to select agronomic traits, and the effect of adding is not ideal

Seeds harvested after generation in Hainan are brought back to the local area for sowing. The seeds need to be invested in breaking dormancy or vernalization, and it is difficult to carry out large-scale planting and selection.

[0004] To speed up the wheat breeding process, there are other methods such as wheat haploid breeding and anther culture, such as wheat haploid breeding, which can significantly shorten the breeding period, but it requires the flowering period of wheat and corn to meet, the technology of immature embryo culture and doubling treatment in the later stage High, high cost, small offspring group, it is difficult to obtain high-quality pure line materials