This paper makes a preliminary analysis based on the quality change trend of varieties approved by Shandong Province from 2005 to 2020.The breeding method of approved varieties from 2005 to 2020 is mainly cross breeding,among which the single cross breeding method is the most widely used.The yield,protein content,and the sum of protein and fat content all showed an upward trend.Although the fat content showed a downward trend,the overall change was not significant.The changing trend of yield and quality characteristics of the approved varieties reflects that the breeding goals of Shangdong province in recent years have mainly been high protein,high quality and high yield,and the breeding methods are mainly single crossing methods in cross breeding.There are many soybean processing enterprises in Shandong Province,and the demand for soybeans is very high every year.High-protein soybeans are soybeans urgently needed by soybean processing enterprises in our province.Therefore,cultivating high-yield and high-quality soybean varieties is of great significance to increasing the production and quality of soybeans in Shandong Province.
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