Abstract: The objective was to analyze the changes of yield and agronomic traits of sesame cultivars released in the region in northern China in the past 11 years. The progress and the changes of breeding traits in the northern area of sesame was discussed, in order to provide scientific evidence for genetic improvement of sesame in future. Based on data of from northern China’s cultivars participated in the adaptation regional test from 2007 to 2017 in northern China, the multiple stepwise regression, correlation analyse and other methods were used to compare agro⁃ nomic traits and grain yield traits, including resistance of 16 identified species. The traits were analyzed for quality and disease resistance. The changes of sesame high-yield and high-quality breeding in northern sesame production areas were studied. Results showed that totally 41 varieties participated the regional test from 2007 to 2017. 16 vari⁃ eties were identified by the National Sesame Variety Identification Committee. The yield of newly bred sesame vari⁃ eties had gradually increased. Year by year, 4 traits increased including number of candidated varieties, plant stem  kength, number of individual plants, and growth period. Correlation analysis and multivariate stepwise regressioanalysis showed that main stem length, capsules per plant, and growth duration had greater impacts on yield, fol⁃ lowed by other traits such as plant height and 1000-grain weight. According to their quality analysis and disease re⁃ sistance, no significant quality improvement was found in the past 11 years. The disease resistance initially de⁃

Key words: sesame, regional test, correlation analysis, multiple stepwise regression