The Stability of Several Traits of Tulip Genotypes Studied in Order to Register as New Cultivars

  • Gabriela SOVAREL Research Development Institute for Vegetable and Flower Growing Vidra
Keywords: genotype, Tulipa sp., traits, stability


Five tulip (Tulipa sp.) genotypes (‘HT 111’, ‘HT 124’, ‘HT 127’, ‘HT 130’ and ‘HT 132’) obtained by controlled crossing followed by repeated selection, at Research Development Institute for Vegetable and Flower Growing (RDIVFG) Vidra, Romania, were studied in 2009-2010 period, in order to recommend for homologation. The relevant characteristics were analysed, following UPOV guidelines (2006). For principal traits, as blooming period in natural conditions, plant height, flower type, shape, length, colour etc., the genotypes were registered with a high stability, the coefficient of variability being under 10% which means a low variability (Munteanu, 2008). The results showed a suitable stability of the traits. All genotypes presented a beautiful colour of flowers, convex or flat (standard) tepals (Tab. 1), and other favourable peculiarities, and for these reasons they will be proposed for registration as new cultivars in next years.