 The study examined the cultivar identity of quinoa plants using spectral analysis of pigments extracted from inflorescences, which revealed the genetic stability of new Polish lines of pharaoh and Titicaca. However, variation was detected in plants representing original cultivars, with genetic distances ranging from 7.5 percent to 55.9 percent. This article was authored by Justyna Lema-Romenska, Natalia Myler, and Krzysztof Giesinski.