Improvement of daylilies (Hemerocallis L.) in the Republic of Moldova

Abstract

The genus Hemerocallis L. has longbeen attributed to the Liliaceae family, then to the Hemerocallidaceae family. Since 2009, on the basis of phylogenetic analyzes, it has beenattributed to the Xantorriaceae family.The species of Hemerocallis are spread in the temperate zones of Oriental Asia, especially in China, in the peninsula of Korea, Japan, Siberia. The most northern species can be considered Hemerocallis lilioasphodelus or H. flava, which is found in the Obi river basin and in Western Siberia. The genus Hemerocallis, the species H. flava, H. fulva are characteristicfor the flora of Europe. Many species of this family are grown as ornamental ones.The paper presents the results of the improvement of the species and varieties of the genus Hemerocallis L., the methods and stages of obtaining some forms and varieties of Hemerocallis hybrida Hort, the forms of Hemerocallis hybrida Hort., with decorative qualities superior to the parent plants.