Annotation

Introduction of highly productive varieties of clover with high rates of green mass, dry matter, seed and product quality in the production is one of the most important ways to increase the efficiency of its sowing. Therefore, breeding is of great importance.

The article presents results of breeding work on white clover under the soil and climatic conditions of the Pre-Carpathian area. The research argues the importance of that plant, as one of the most important pasture perennial legumes. The study was conducted during 2018–2019. In the collection nursery, 30 numbers were studied. The main task was to select the best numbers for their further use in plant breeding work in order to create new varieties of white clover, being adopted to the conditions of the region of cultivation. The phenological observations demonstrated that duration of the vegetative period of the studied samples of white clover made 127–136 days from the phase of the beginning of spring regrowth to the full ripeness of seed. The collection samples were divided into three groups of ripeness: early ripening, medium ripening and late ripening. To make complete characteristics of the samples and increase the efficiency of selection, the researcher determined the parameters of the structure of seed yield, particularly, the length of flower head, the diameter of inflorescence (head), the number of flowers in the head, the number of seeds in the head, weight of 1000 seeds, weight of seeds from one plant. The highest seed yield was produced by № 1139 – 0.138 t/ha, № 356 – 0.136 t/ha, № 5 – 0.135 t/ha, № 924 – 0.134 t/ha, № 796 – 0.130 t/ha, № 1081 – 0.132 t/ha, № 1076 – 0.133 t/ha referring to the average seed yield of the standard 0.116 t/ha. Breeding work on the samples with best economic and valuable features will be carried out in the future.