The researchers studied high oleic acid germplasm in Chinese peanut core collection to improve oil quality. They found 40 accessions with over 57% oleic acid content, coming from various regions in China. Three accessions had high oleic acid and oil content, with Zh.h4094 having the highest levels. The genetic diversity of high oleic acid in Chinese peanuts was abundant, with varieties classified into 8 groups based on botanical and yield traits. This study shows that breeding techniques can be used to develop high oleic fatty acid in peanuts.