Formation of vegetative and generative spheres of North American blueberries in southern West Siberia
The results of a multi-year study of formation pattern of vegetative and generative spheres of North American highbush, half-high and lowbush blueberries in southern West Siberia are presented. It is established that North American blueberries form the vegetative sphere quite a long time (8-10 years) in Siberia. Therefore, a good harvest on the plant is noted by the 6<sup> th</sup> - 7<sup>th</sup> years after planting by biennual seedlings. Half-high blueberries the most promising for introduction into culture are characterized by heavy yield (up to 2.2 kg per a bush) and large fruitfulness (on the average 10.0 x 13.3 mm and 1.3 g, at most 18.0 x 21.0 mm and 5 g). Of interest are also large-fruited and high-yielding forms of lowbush blueberry and highly winterhardy early and late cultivars of highbush blueberry.