VEGETATIVE REPRODUCTION FEATURES OF SOME REPRESENTATIVES OF THE GENUS CHRYSANTHEMUM L.

The purpose of research is to study the features of vegetative propagation by green cuttings of some varieties of small-flowered chrysanthemums. Tasks: determination of the coefficient of vegetative multiplication (CVR) and the degree of rooting of green cuttings, selection of varieties for industrial cultivation. The objects of study are 92 taxa of small-flowered chrysanthemum from the collection of the South Ural Botanical Garden-Institute of the Ural Federal Research Center of the Russian Academy of Sciences. The study was carried out in 2016–2022 on the basis of the laboratory of introduction and selection of flowering plants in a production greenhouse. Statistical processing of the data array was carried out using the MS Excel and Statistica 10 software packages. Three groups of varieties were identified in terms of CVR: difficult to propagate, or unproductive – CVR < 10 (‘Zolotoj Orfej’, ‘Svemba Kars’, ‘Elen’, etc.), medium productive – CVR 10–19 (‘Vechernie Ogni’, ‘Izabel’, ‘Kurochka Ryaba’, etc.), easily propagated, or highly productive, – CVR ≥ 20 (‘Varvara’, ‘Director Z.Kh. Shigapov’, ‘Professor L.M. Abramova’, etc.). Also, 3 groups of varieties were identified according to the rooting rate of green cuttings: with a low degree – < 60 % (‘Valli Ruf’, ‘Vi Villi’, ‘Listopad’, etc.), with an average degree – 60–85 % (‘Dina’, ‘Zlata, ‘Cygan, etc.), with a high degree of rooting – > 85 % (‘Volny Agideli’, ‘Doktor V.P. Putenihin’, ‘Mazurka’, etc.). Based on the totality of the studied parameters, 19 varieties were identified that can be recommended for industrial use.