Parameters of the model of orchardgrass variety (Dactylis glomerata L.) in the conditions of the Pre-Carpathian region

The variety is a key reserve for conserving resources and increasing productivity of agricultural crops in Ukraine.The development of a variety model plays an important role in breeding work.The research was conducted in the Pre-Carpathian region in a special selection crop rotation at the experimental base of the Pre-Carpathian Research Department.Agricultural technology of growing orchardgrass for fodder and seeds in this research was as generally accepted in the region.The samples were studied in a control nursery and in competitive variety testing.The goal of the study was to demonstrate and establish the parameters of a variety model Dactylis glomerata L. suitable for cultivation in the conditions of the Pre-Carpathian region.The results of two-year studies of competitive variety testing indicate that in haying (two harvests) by the yield of fodder mass and seeds the selection sample 1842 significantly exceeded standard Boikivchanka and provided yield of green mass 58.4 t/ha, dry matter 14.06 t/ha and seeds 0.513 t/ha.That was respectively by 10 t/ha (at LSD0,5 1.5-5.2t/ha), by 1.42 t/ha (at LSD0,5 0.48-1.18t/ha) and by 0.042 t/ha (at LSD0,5 0.033-0.038t/ha) higher.This selection sample provided also the highest yield of green mass (46.83 t/ha) at pasture use (five cycles), exceeding the standard by 1.64 t/ha or 3.6 %.Research on testing varieties and breeding numbers of Dactylis glomerata L. allowed us to create a model of a promising variety suitable for the conditions of the region.This model provides a yield of green mass 58.0 t/ha, dry matter -12.1 t/ha, seeds -0.50 t/ha and has the potential to increase yields in the conditions of the Pre-Carpathian region.Its optimal parameters will help to increase the efficiency of selection of economically valuable genotypes of Dactylis glomerata L. plants and targeted breeding processes in the creation of high-yielding varieties.