Reproductive ability of tetraploid cowberry (Vaccinium vitis-idaea L.)

Creation of allotetraploid cowberry-blueberry hybrids is a promising direction in Vacciniaceae breeding. However, obtaining such hybrids is difficult because of biological features of tetraploid cowberry. In this regard the aim of research was study of pollen viability of tetraploid cowberry, its crossing ability with different species and interspesific blueberry hybrid in various years, as well as based on the results obtained, selection of promising methods of growth stimulation of pollen tubes, hybrid seed setting and cultivation of hybrid seedlings.

As a result of research it has been established that tetraploid cowberry is characterized by low productivity and pollen viability, although its viability may reach 10.7 % in some years. Hybrid seedlings gradually died off with growth. On the base of the data obtained it is proposed that a special technique be used to increase hybrid fruit setting (pollination of flowers by a mixture of pollen, pollination in different life spans of a flower, castration of flowers without removing a corolla, reciprocal crosses, spraying pollinated flowers by solutions of growth regulators and microelements) and cultivation of hybrid seedlings (in vitro culture).

1. Marozau A. U. Avtatetraploidy Vaccinium vitis-idaea L. in natural conditions. Vestsi Akademii navuk Belarusi. Seryya biyalagichnykh navuk =Proceedings of the Academy of Sciences of Belarus. Biological series, 1995, no. 2, pp. 5–11 (in Belarusian).

2. Morozov O. V. Scientific basis for the culture and breeding of cowberry (Vaccinium vitis-idaea L.) in Belarus. Ph. D. Thesis. Minsk, 2005. 274 p. (in Russian).

3. Gorbunov A. B., Kurlovich T. V., Asbaganov S. V., Snakina T. I. The origin of the cowberry-blueberry hybrid breeding of the Central Botanical Garden of the National Academy of Sciences of Belarus. Sibirskii vestnik sel’skokhozyaistvennoi nauki [Siberian journal of agricultural science], 2017, vol. 47, no. 2, pp. 13–21 (in Russian).

4. Tatarintsev A. S., Zaets V. K., Kuz’min A. Ya., Ul’yanishchev M. M., Abramov N. A., Lobanov G. A. Selection and cultivation of fruit and berry crops. Moscow, State Publishing House of Agricultural Literature, 1960. 408 p. (in Russian).

5. Golubinskii I. N. Pollen germination biology. Kiev, Naukova dumka Publ., 1974. 368 p. (in Russian).

6. Gorbunov A. B., Snakina T. I. Blueberry. Introduktsiya netraditsionnykh plodovykh, yagodnykh i ovoshchnykh rastenii v Zapadnoi Sibiri[Introduction of not traditional fruit, berry and vegetable plants in West Siberia]. Novosibirsk, 2013, pp. 109–127 (in Russian).

7. Pavlovskii N. B., Ruban N. N. Varietal cowberries in the Belarusian Polesie. Minsk, Tehkhnalogiya Publ., 2000. 230 p. (in Russian).

8. Tatarintsev A. S. Course of lectures on genetics. Voronezh, Main Department of Higher and Secondary Agricultural Education Michurinsky Fruit and Vegetable Institute, 1971. 252 p. (in Russian).

9. Gorbunov A. B., Cherkasov A. F., Levgerova N. S. Cowberry selection (cranberry, cowberry, blueberry). Programma i metodika selektsii plodovykh, yagodnykh i orekhoplodnykh kul’tur [Program and methods of selection of fruit, berry and nut crops]. Orel, 1995, pp. 468–477 (in Russian).