Variety breeding method

Abstract

The invention discloses a variety breeding method. According to the variety breeding method, a drought-resistant soybean variety, a saline-alkaline-tolerant soybean variety, a budworm-resistant variety, a cyst nematode disease-resistant variety, a soybean downy mildew-resistant variety, a soybean grey spot-resistant variety and a soybean mosaic virus disease-resistant variety are used as cross parents, and a variety is bred through hybridization and multiple-cross polymerization and through multi-generation stress resistance and disease and pest resistance identification and screening. The high-stress-resistance soybean variety which can highly resist seven kinds of stress and diseases and pests and is excellent in agronomic and yield traits is bred. Compared with a common soybean variety, the yield of the bred soybean variety is increased by 15-18% per mu, the pesticide spraying cost is reduced by 80-90 yuan per mu, the economic benefit can be increased by 300-450 yuan per mu, meanwhile, the variety can be planted in arid areas and saline-alkali areas, the economic income of farmers in the arid areas and the saline-alkali areas can be greatly increased, and the life of the farmers is improved; and through a seed screening machine, seeds are selected, and the seeds which cannot well develop are removed, so that the variety excellencyof the final seeds is ensured, and the survival rate is increased.

Description

technical field [0001] The invention belongs to the technical field of variety breeding, and in particular relates to a variety breeding method. Background technique [0002] Soybean is one of the important grain and oil crops in my country, and its planting area and total output rank among the top in the world. Soybean has a high water requirement and is one of the most sensitive crops to water scarcity among leguminous crops. Due to the dry climate and the lack of necessary irrigation conditions in most soybean producing areas in my country, there are always some producing areas that are affected by drought every year and affect the normal growth and development of plants, resulting in a decrease in soybean yield. Saline-alkali soil is a soil type widely distributed on the earth's land, accounting for about 25% of the total land area. The area of ​​saline-alkali land in the world is nearly 1 billion hectares. According to the second soil census in my country, the area o...

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Problems solved by technology

[0003] When seeds can be produced in large quantities, the selection of seeds has become a major problem. Seeds with dysplasia or low survival rate mixed in the improved species will lead to the failure of plants to grow in some locations during the subsequent sowing growth process, thus waste of land resources

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