The features of clonal microreproduction of clematis varieties (Clematis L.)

In the Laboratory of Fruit Growing, FSBEI HE ‘Russian State Autonomous Agricultural Academy named after K.A. Timiryazev’ an extensive collection of varieties of clematis (about 30) has recently appeared. For a number of years the works on optimization of the technique of cutting this culture have been conducted. However, for certain varieties which are of great interest for using in vertical gardening, cuttings are ineffective. First of all, it is due to low ability to rooting of a number of terry and semi-double varieties. Secondly, the period of cutting of shanks is limited on time. In open ground, it is possible to carry out cuttings only once during the period of mass growth of young, not lignified shoots before buds’ opening. This period lasts in our zone for 2-3 weeks, and then the shoots quickly lignify. Keeping mother plants in a greenhouse during vegetation period it is possible to carry out 3 cuttings during a season. But with each subsequent cutting the number of cuttings decreases, since flower buds are laid lower and lower to the base of the bush...