A Salt Tolerance Breeding Method of Wheat Using Flower Haploid to Screen Excellent Salt Tolerance Lines

Abstract

The invention discloses a salt-tolerant wheat breeding method for screening an excellent salt-tolerant strain by means of anther culture of haploid. The breeding method comprises the steps that 1, a salt-tolerant wheat resource and a breeding main parent are screened; 2, salt-tolerant wheat screening pressure is determined; 3, the salt-tolerant wheat resource is hybridized with the breeding main parent, and an F1 hybrid species is obtained; 4, the F1 hybrid species is subjected to anther culture, and a haploid plant is obtained; 5, subculture root strengthening of the haploid plant is conducted; 6, the haploid plant is subjected to root-soaking reduplication; 7, anther-cultured seedlings are subjected to single-plant seed collection, an anther culture family is obtained, screening of agronomic characteristics and salt resistance is conducted, and the novel salt-tolerant wheat strain is obtained. According to the salt-tolerant wheat breeding method for screening the excellent salt-tolerant strain by means of anther culture of the haploid, the salt-tolerant wheat breeding cycle is significantly shortened, the salt-tolerant wheat breeding speed is greatly increased, salt-tolerant wheat breeding can be achieved within three years, and important industrial value is achieved.

Description

technical field [0001] The invention relates to the field of agricultural biotechnology, in particular to a salt-tolerant breeding method for wheat which utilizes haploids to screen excellent salt-tolerant strains, which can significantly shorten the salt-tolerant breeding cycle of wheat and greatly speed up the salt-tolerant breeding speed of wheat. Background technique [0002] Soil salinization is a worldwide resource problem and ecological problem. According to statistics, there are about 950 million hectares of various saline soils in the world, accounting for 10% of the global land area, and are widely distributed in more than 100 countries and regions. Moreover, about 50% of the global irrigated land area suffers from soil salinization to varying degrees. Due to the secondary salinization of soil, the global salinized area is still increasing rapidly. The development of soil salinization has brought serious economic losses and ecological hazards. Statistics from the...

AI Technical Summary

Problems solved by technology

Some scientific research institutes at home and abroad have adopted the method of salt-treating wheat tissues to screen salt-tolerant variants of wheat, and there are also reports on cultivating wheat anthers to screen salt-tolerant variants to cultivate salt-tolerant varieties of wheat, but in the expansion of wheat haploid pathway Lack of use

Common wheat is hexaploid, with 6 chromosome groups and 42 chromosomes in the somatic cells. The genome is huge, and the salt tolerance mechanism of wheat is very complicated, which is the result of the coordinated expression of a large number of genes. Among them, the role of salt-induced expression genes is very important. Salt resistance is controlled by quantitative traits, and the compensation effect of genes leads to the resistance of conventional wheat tissues to salt damage and weakens the sensitivity of wheat tissues to salt treatment, resulting in the insensitivity of conventional salt tolerance screening

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