Genotypic and Environmental Effects on the Variation of Vitamin Contents in Red Pepper (Capsicum аппиит L.) Varieties

摘要

Red peppers are a remarkably rich source of vitamins in the human diet and widely consumed in Korea. However, comprehensive studies have not reported on the effects of genotype, cultivation regions, and year of cultivation on the vitamin composition of the pepper fruits. To address this, twelve commercial pepper varieties were grown at two locations in Korea during 2016 and 2017, and the concentrations of vitamin A, Bb B2, B3, B5, and E (a-, P-, 5-, y-tocopherols) in pepper pericarps were determined.Statistical analysis of the combined data showed significant differences among varieties, locations, and years for the measured components. The % variability analysis demonstrated that environment (location and year) and genotype-environment interactioncontributed more to the nutritional contents than the genotype alone. Particularly, variation in vitamins А, С, B2, B3, and y-tocopherol was attributed to the year of cultivation. a-Tocopherol primarily varied by the genotype-environment interaction.Vitamin B5 was the trait that the most highly affected by genotype. The location effect was significant for P-tocopherol. Partial least squares discriminant analysis (PLS-DA) results showed that the separation of vitamins was distinct by year and location. These results were supported by the % variability analysis. Our study could explain the natural variation in the vitamin compositions of peppers by genotypes and environments.