Breeding method for high-yield disease-resistant strong gluten wheat in middle and lower reaches of Yangtze River

Abstract

The invention discloses a breeding method for high-yield disease-resistant strong gluten wheat in the middle and lower reaches of Yangtze River. The breeding method comprises the following steps: a wheat variety which has excellent comprehensive agronomic characters and good comprehensive disease resistance and carries a gibberellic disease-resistant site QFhs.crc-2DL in the middle and lower reaches of Yangtze River is taken as a parent 1, a powdery mildew-resistant wheat variety (line) or an intermediate material is taken as a parent 2, after the parent 2 and the parent 1 are hybridized once, backcrossing is carried out for multiple times to fix the genetic background of excellent comprehensive agronomic characters and good comprehensive disease resistance of offspring, in the backcrossing process, each generation is artificially inoculated to identify powdery mildew resistance, a powdery mildew-resistant offspring single plant is hybridized with a powdery mildew-resistant and high-yield strong gluten or medium strong gluten wheat variety (line) parent 3 in the middle and lower reaches of the Yangtze River, and the high-yield disease-resistant strong gluten wheat variety in the middle and lower reaches of the Yangtze River is bred by combining the selection of a gibberellic disease-resistant molecular marker, the phenotype selection for enhancing comprehensive disease resistance, the high-generation identification of yield and the evaluation of the quality of flour and bread. The method greatly reduces the workload of identification of low-generation and high-generation field gibberellic disease.

Description

technical field [0001] The invention belongs to the technical field of wheat breeding methods and relates to a method for breeding high-yield, disease-resistant, strong-gluten wheat in the middle and lower reaches of the Yangtze River. Background technique [0002] (1) The middle and lower reaches of the Yangtze River is the largest rice-wheat rotation area in my country, and the total output of rice and wheat accounts for more than 1 / 3 of the country's total. Since the 1990s, with the continuous expansion of the area of ​​rice machine transplanting and direct seeding, the harvest period has been continuously delayed, resulting in a gradual delay in the wheat sowing period. Delayed sowing causes wheat to be prone to high temperature and humidity from flowering stage to maturity stage, which increases the risk of encountering various diseases and adversity: if there is a large outbreak of head blight, it will not only seriously affect the yield and quality of wheat, but the t...

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Problems solved by technology

[0010] (10) In summary, the existing problems in the prior art are: lack of germplasm resources and genes / loci for excellent disease resistance or strong gluten, long breeding cycle, unreliable selection of low-generation phenotypes, and large segregation of offspring traits , the target traits of breeding selection are difficult to stabilize in a short period of time, and the workload of disease resistance identification and yield identification of the advanced generation is relatively large, which is not conducive to artificial selection, and the effect is difficult to achieve the expected goal

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