New early ripe variety of fiber flax Strizh for the conditions of the North-West of Russia

   The purpose of the research is a comprehensive assessment of the main breeding valuable traits and properties of a new fiber flax variety Strizh on the basis of breeding variety testing.

   The studies were carried out on sod-weakly podzolic well-cultivated soil in the conditions of the North-West of Russia (Pskov region) in 2018-2020. The most favorable hydrothermal conditions of the growing season for the growth and development of fiber flax were in 2019 (HTC = 1.53; Ij = +1.57), unfavorable – in 2018 (HTC = 0.95; Ij = -0.80). The Strizh variety is a high-yielding in flax fiber early-ripening type (the growing season is 69 days) matures 2-3 days earlier than Dobrynya standard variety. The average yield of flax fiber over the years of the research is 18.6 c/ha, which significantly exceeds the standard variety by 2.3 c/ha or 14.1 % (LSD05 - 0.90 c/ha), maximum yield is 20.3 c/ha. In terms of seed yield, it was inferior to the standard (9.9 c/ha) by 1.8 c/ha or 18.2 %. The new variety is highly resistant to lodging (5 points) and fusarium wilt (85 %). It has a very high flax fiber content in the stems (40.0...40.6 %), which is 3.1...4.8 % (abs.) higher than the standard, and its better quality (strength and flexibility). In production conditions, it provided the production of 19.5 c/ha of flax fiber, that is 2.3 c/ha or 13.4 % higher than the standard (LSD05 = 0.96 c/ha). It has the highest yield under contrasting conditions (genetic flexibility) – 19.3 c/ha and higher stress resistance (-2.0). The Strizh variety and the standard are characterized by low variability of fiber flax yield (CV = 9.8-9.6 %), they are also distinguished by high plasticity (bi = 1.12-1.17), which indicates a good responsiveness of these varieties to improved environmental conditions. The Strizh variety has been in the state variety testing since 2021.

1. Rozhmina T. A., Ponazhev V. P. Condition and prospects of development of linen sector of Russia. Vestnik Rossiyskoy akademii estestvennykh nauk = Bulletin of the Russian Academy of Natural Sciences. 2015:15(1):59-63. (In Russ.). URL: https://www.elibrary.ru/item.asp?id=23480557

2. Jhala A. J., Hall L. M. Flax (Linum usitatissimum L.): current uses and future applications. Australian Journal of basic and Applied Sciences. 2010:4(9):4304-4312. URL: https://agronomy.unl.edu/documents/jhala-2010-30.pdf

3. Ushchapovskiy I. V., Novikov E. V., Basova N. V., Bezbabchenko A. A., Galkin A. V. System problems of flax growing in Russia and abroad, the possibilities of their solution. Molochnokhozyaystvennyy vestnik. 2017:(1(25)):166-186. (In Russ.). URL: https://elibrary.ru/item.asp?id=28914488

4. Migulev P. I., Chernikov V. G., Rostovtsev R. A., Androshchuk V. S. Flax: problems and prospects. Innovative approaches to the development of science and production in the regions: Collection of scientific works according to the proceedings of the National scientific and practical. conf. Tver: izd-vo Tverskoy GSKhA, 2019. pp. 199-201. URL: https://elibrary.ru/item.asp?id=37651492&pff=1

5. Rozhmina T. A., Pavlova L. N., Ponazhev V. P., Zakharova L. M. Linen industry on the way to revival. Zashchita i karantin rasteniy. 2018:(1):3-8. (In Russ.). URL: https://www.elibrary.ru/item.asp?id=32368923

6. Pavlova L. N., Gerasimova E. G., Rumyantseva V. N., Kudryavtseva L. P. New varieties of fiber flax are the basis for increasing the efficiency of the flax industry. Scientific support for the production of fiber crops: state, problems and prospects. Collection of scientific works. Tver: Tverckoy GU, 2018. pp. 23-25.

7. Stepin A. D., Ryseva T. A., Utkina S. V., Romanova N. V. Introduction of new varieties of fiber flax of Pskov breeding into production. Innovative developments for the production and processing of bast fiber crops: Collection of materials of International scientific-practical conf. FGBNU VNIIML. Tver, 2016. pp. 66-71.

8. Traburova E. A., Konova A. M., Gavrilova A. Yu., Zueva S. M., Chekhalkov S. M. Comparative characteristics of medium-maturing varieties of fiber-flax of smolensk selection. Agrarnyy vestnik Urala = Agrarian Bulletin of the Urals. 2020;(1(192)):28-34. (In Russ.). doi: 10.32417/1997-4868-2020-192-1-28-34

9. Zhuchenko A. A. Adaptive system of plant breeding (ecological and genetic bases). Moscow: RUDN, 2001. Vol. 1. 780 p.

10. Rybas' I. A. Breeding grain crops to increase adaptability. Sel'skokhozyaystvennaya biologiya = Agricultural Biology. 2016;51(5):617-626. (In Russ.). doi: 10.15389/agrobiology.2016.5.617rus

11. Stepin A. D., Rysev M. N., Ryseva T. A., Utkina S. V., Romanova N. V. Screening of fiber flax varieties from the VIR collection according to flax fiber yield and adaptability parameters in the conditions of the Nortwestern region. Agrarnaya nauka Evro-Severo-Vostoka = Agricultural Science Euro-North-East. 2020;21(2):141-151. (In Russ.). doi: 10.30766/2072-9081.2020.21.2.141-151

12. Traburova E. A., Rozhmina T. A. Examination of collection samples of flax (Linum usitatissimum L.). Dostizheniya nauki i tekhniki APK = Achievements of Science and Technology of AICis. 2018;32(11):40-42. (In Russ.). doi: 10.24411/0235-2451-2018-11110

13. Kuzemkin I. A., Rozhmina T. A. Screening of accessions from fiber flax collection by productivity and their adaptability to the conditions of the North-West region of Russia. Agrarnaya nauka Evro-Severo-Vostoka = Agricultural Science Euro-North-East. 2022;23(5):666-674. (In Russ.). doi: 10.30766/2072-9081.2022.23.5.666-674

14. Gordeev A. V., Kleshchenko A. D., Chernyakov B. A., Sirotenko O. D., Siptits S. O., Romanenko I. A., Bartalev S. A., Savin Yu. I. Bioclimatic potential of Russia: productivity and rational distribution of agricultural crops in the context of climate change. Moscow: Tipografiya Rossel'khozakademii, 2012. 203 p.

15. Rasukas A., Jankauskiene Z., Jundulas J. Asakaviciute R. Research of technical crops (polato and flax) genetic resources in Lithuania. Agronomy Research. 2009;7(1):59-72.

16. Stepin A. D., Rysev M. N., Kostrova G. A., Utkina S. V. The main directions and results of scientific research of the Pskov National Research University on fiber flax breeding. Izvestiya Velikolukskoy gosudarstvennoy sel'skokhozyaystvennoy akademii. 2019;(2):14-21. (In Russ.). URL: https://www.elibrary.ru/item.asp?id=41309097

17. Goncharenko A. A. On adaptivity and ecological resistence of grain crop varieties. Vestnik RASKhN. 2005;(6):49-53. (In Russ.).