Method for breeding wheat variety resistant to gibberellic disease

Abstract

The invention discloses a method for breeding a wheat variety resistant to gibberellic disease, and belongs to the technical field of breeding. The method comprises the following steps: hybridizing wheat parent materials which are excellent in agronomic character, resistant to gibberellic disease and not high in stalk to obtain an F1 generation; sowing and planting the F1 generation in a suitable sowing period of wheat, spraying gibberellic disease bacterial liquid for 3-4 times from the initial stage of flowering to the end of flowering, creating a hotbed for gibberellic disease, inducing gibberellic disease outbreak, observing and recording before the wheat is completely ripe, marking single ears which are not infected with gibberellic disease or are slightly infected with gibberellic disease, and carrying out harvesting and threshing after the wheat is completely ripe to obtain an F2 generation. Through multi-generation screening cultivation, the defect of unstable resistance of natural condition screening is overcome, the wheat variety resistant to gibberellic disease infection can be effectively selected, meanwhile, it is guaranteed that the bred variety has stable gibberellic disease resistance, technical reference is provided for China, especially for units without natural identification conditions, and therefore, the method has very important significance and application value for comprehensively improving the wheat gibberellic disease resistance breeding level in China.

Description

technical field [0001] The invention relates to a wheat breeding method, in particular to a breeding method for bred wheat varieties resistant to small blight, and belongs to the technical field of breeding. Background technique [0002] In recent years, the occurrence of wheat scab has been frequent and high, and the occurrence of scab has led to a decrease in wheat yield and seriously affected the quality of wheat, resulting in the inability of wheat to be used for food or even feed. In terms of production, chemical control is generally adopted in wheat planting areas The method is to spray pesticides during the flowering stage of wheat to suppress the recurrence of scab. In some places, chemicals have to be applied three to four times, but the expected effect is still not achieved. The use and residue of a large number of chemicals not only causes ecological environment The damage to the scab is serious, and it brings potential danger to food safety. Therefore, only by st...

AI Technical Summary

Problems solved by technology

[0002] In recent years, the occurrence of wheat scab has been frequent and high, and the occurrence of scab has led to a decrease in wheat yield and seriously affected the quality of wheat, resulting in the inability of wheat to be used for food or even feed. In terms of production, chemical control is generally adopted in wheat planting areas The method is to spray pesticides during the flowering stage of wheat to suppress the recurrence of scab. In some places, chemicals have to be applied three to four times, but the expected effect is still not achieved. The use and residue of a large number of chemicals not only causes ecological environment The damage to the scab is serious, and it brings potential danger to food safety. Therefore, only by starting from the source and breeding varieties resistant to scab can the problem be fundamentally solved.