1Nargiz Baramidze, doctor of agrarian sciences
2Shorena Kharatishvili, doctoral candidate
3Lia Mdzeluri, doctoral candidate
4Maia Khutsishvili, candidate of agrarian sciences
5Zoia Tskaruashvili.

Georgia, Tbilisi, Scientific-Research Center of Agriculture;
Georgia, Tbilisi, Agrarian University.
1Senior specialist of the Scientific-Research Center of Agriculture;
2Consultant at the Scientific-Research Center of Agriculture;
3Consultant at the Scientific-Research Center of Agriculture;
4Researcher at the Agrarian University;
5Researcher at the Agrarian University.



The paper considers biotechnological characteristics of new breeds of mulberry silkworm „V-1“ and „V-2“, which are relatively resistant to the worm disease „nuclear polyhedrosis“. The hybreeds were obtained from mulberry silkworm breeds „Dighmuri“ and „Iveria“. Breed “Iveria” is characterized by short period of feeding; it was created for the west Georgia zone, while the cocoon thread length of the breed “Dighmuri” is 1800-2000 meter, silk capacity of live cocoon is 25-26%, but these breeds are characterized by relatively low viability [1,2,3]. Our research aimed to improve namely this flaw. As a result of complex selection works carried out for the improvement of the above stated viability and other major indices we received new highly productive breeds, which by their indices equal or exceed initial breeds.

Keywords: mulberry silkworm, selection, diseases, silk cocoon, viability.


1. Giorgadze, L.Kobakhidze, E.Tsotskolauri. Estimation of selection efficiency according to warm viability along the one generation period, Collection of Scientific Works of Georgian Agrarian University «Problems of Agrarian Sciences», v. 33, Tbilisi, 2005, p. 92-94.
2. N.Baramidze, M.Khutsishvili, Z.Tskaruashvili, I.Gujabidze. Comparative study of Georgian breeds of mulberry silkworm according to the main biotechnological characteristics. Annals of Agrarian Science. V. 14 (2016), pp. 56-60.
3. Khursishvili M. Correlative dependence between concentration of total proteins of mulberry silkworm hemolymph and biotechnological characteristics. GAU, Collection of Scientific Works, vol.3 (52)2010, Tbilisi, p. 32-35(in Georgian).
4. Butenko A.G. Refraction of mulberry silkworm hemolymph connected with gender and breed. J. “Silk”, #3. Tashkent, 1995 (In Russ.)
5. Begum A., Basavaraja H., Patil A. et al. Studies on the characteristics of cocoon in different breeds of silkworm, Bombyx mori L. // Sericologia, 2004, 44(4), p.497-512. www.silkwormmori.
6. Grekov D., Kirovska N., Avramova K. Dynamics of the major biological parameters in some lines of the silkworm (Bombyx mori L.) from Japanese type / Proc. of International jubilee scientific conference: Problems of maintenance and utilbzation of mulberry and silkworm genetic resources (2006.Bulgaria). Dobrich: Integral, 2007,
7. Kipriotis E., Kousenidis K. Some practical aspects involved to silkworm breeding / Proc. of International jubilee scientific conference: Problems of maintenance and utilization of mulberry and silkworm genetic resources 2006, Bulgaria. Добрич: Интеграл, 2007, p.194-201.
8. Lakshmi H., Ramesh-Babu M., Prasad J., Chandrashekharaiah A. Identification of promising cross breed APM1 x APS98 in mulberry silkworm through mani-festation of hybrid vigour // Bull. Ind. Acad. Ser., 2008, 12, p. 1-11.
9. Lazarov Y. Tzenov P., Nacheva Y. Study on the tolerance of silkworm (Bombyx mori L.) hybrids to unfavorable conditions of rearing // Bulgarian J. of Agric. Sci., 2000, 6, N 5, p. 589-592
10. Mano Y., Kumar S., Basavaraja H. et al. A new methods to select promising breeds and combinations // Indian Silk, 1993, 31, p. 53-59. www.silkwormmori.
11. Mubashar Hussain, Shakil Ahmad Khan, Muhammad Aslam. Evaluation of genetic potential of inbred pure lines of silkworm for breeding and cocoon production in Pakistan // African Journal of Food Science, 2010, v. 4(5), pp. 300 -302/May 2010,
12. Nacheva Y., Petkov N. Rates of genetic difference between parent breeds of silkworm moth Bombyx mori L. hybrids for the indexes of intracocoon unevenness and inter cocoon concordance of the silk filament. Bulgarian J.of Agric Sci., 2001,6, № 7,p.107-110.