Method for breeding wheat resisting short-stalk powdery mildew

Abstract

The invention mainly provides a method for breeding wheat resisting short-stalk powdery mildew, mainly comprising the following steps: carrying out the sexual hybridization with short stalk wheat as the maternal parent and Xi'an 8 wheat as the male parent to obtain an initial F generation; experimentally planting the cultured F generation under a severe environment, carrying out the purification, rejuvenation and sowing; carrying out the purification and rejuvenation again; using the remain seeds as the F1 generation; sowing the seeds of the F1 generation, and purifying and remaining the original strains of meeting the characteristics of the F1 generation through selective preference and rogueing; re-breeding till the strain being basically stable, separately planting seeds purified from various areas, and carrying out the mixed harvest; and planting the seeds of the mixed seeds of the mixed-harvest strain, and then purifying and rejuvenating again. The variety bred by the invention has good powdery-mildew resistance, is relatively light in the outbreak of banded sclerotial blight, and has better integral property; the variety is suitably and widely planted in the south areas of winter wheat in Yellow River and Huai River such as north Anhui Province, northwest Jiangshu Province, southwest Shandong Province, plain irrigation areas of Shanxi Province, North China plain, and the like.

Description

Technical field [0001] The invention relates to a breeding method, in particular to a wheat breeding method. Background technique [0002] Whether in China or in the world, wheat is one of the most important crops. It is also the most adaptable crop. Its output ranks first in important farming including corn, rice and potato. However, the pests and diseases of wheat have caused serious losses to its yield, and the yield loss can reach about 80% in severe cases. Therefore, it has brought great damage and influence to agricultural production. Coupled with the substantial improvement in people’s quality of life and the restrictions on green food requirements, it is obviously not advisable to use chemical agents to prevent pests and diseases. Obviously, this will cause environmental pollution, not to mention, destroy the ecological balance, and at the same time create growth. The residues of a lot of medicines are taken by the human body and cause different degrees of harm to the hum...

AI Technical Summary

Problems solved by technology

Although there are many high-yield and good-resistant varieties that have been researched, some of them cannot keep up with the later yield due to their poor disease resistance; or, although some have good resistance, they have disadvantages such as low yield. Relatively increased, and some can not maintain very stable characteristics, or the characteristics of varieties are relatively stable, but cannot be promoted on a large scale, and are limited to specific planting areas

In short, in the breeding process, how to combine disease resistance, yield, and wide planting area is a very difficult and long process, and it also involves the selection of parents, which is also a labor-intensive process. process, because the influence of parent selection on new varieties is self-evident

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