Production and biological characteristics of vegetative rootstocks of apple and pear trees

Research Institute of Fruit and Tea Growing of the Ministry of Agriculture of the Republic ofAzerbaijan, Quba, Azerbaijan to the "Program and methodology of variety study of fruit, berry and nut crops" of the All-Russian Research Institute of Fruit Crop Breeding. The monthly growth dynamics for PB-4 was the most intense in August, and for M9 and 62-396 – in August-September. In M 9, 4-5 shoots with a height of 70-104 cm and a diameter of the root neck 8-10 mm were formed on the mother bush, MM 106 – up to 6 shoots with a height of 63- 82 cm and a diameter of the root neck 7-9 mm. In other rootstocks, the number of shoots ranged from 3 to 6, their height ranged from 63 to 111 cm, and the diameter of the root neck randed from 6 (PB-4) to 10 mm (62-396). In the M-9 rootstock, root formation was estimated at 4-5 points, in others – at 2-5. The results of this study help to better understand the similarities and differences in the biology and economically valuable traits of these rootstocks, which provides important clues for all players involved in the fruit growing sector. Key words: Azerbaijan, horticulture, vegetative rootstocks, growth and development, regenerative ability