Introduction and selection of garden roses in the Stavropol Botanical Garden

Abstract

The analysis of the introduction and selection work with garden roses carried out in  the  Stavropol  Botanical  Garden  is  presented.  The  study  of  decorative  and  economic  and  biological features  of  garden  roses  allows  us  to  reveal  the  potential  of  cultivars  for  further  use  in  the  practice of gardening, landscape design and breeding. The task of our research included: the study and selection of garden roses, taking into account adaptability and plasticity in the corresponding agro-climatic zones of Stavropol and the creation on their basis of new domestic cultivars of highly ornamental, with repair, long flowering and resistant to fungal diseases. To achieve this goal, the method of spontaneous somatic mutations and the method of intervarietal hybridization were used. Two cultivars of Yanka and Pearl of the Caucasus, obtained by spontaneous mutagenesis have adapted well, bloom profusely, which indicates the success of the introduction and the prospects for their use. In 2017 patents and copyright certificates were obtained for cultivars resulting from kidney mutations. During intersort hybridization, the cultivars of roses of the floribunda group Erfordia and Lion’s Rose, which are close in origin, differ little morphologically, tie fruits well with free pollination, have high decorative, repair, and resistance to mycoses, were involved in  the  breeding  process.  Both  cultivars  were  included  as  maternal  and  paternal  plants.  The  cultivar Erfordia, taken as a mother plant, when pollinated with pollen of the Lion’s Rose cultivar, tied hybrid fruits by 100%, and when pollinated with the Lion’s Rose cultivaris with pollen of the Erfordia cultivars, the fruits tied only by 60%. 104 hybrid seedlings were obtained from crossing two combinations, from which 7 valuable decorative hybrid seedlings were selected. The selected hybrid seedlings were vegetatively propagated on the rootstock of the dog rose (R. canina L.) and underwent primary cultivar evaluation.