Worldwide gene pool of fiber flax at VIR, and breeding of rust-resistant varieties

Background. There are strict requirements for a modern flax cultivar. It must have a whole set of valuable characters, including rust resistance.

Materials and methods. The flax collection of 2485 accessions held by VIR was evaluated using artificial provocative infection.

Results. Almost all domestic and foreign accessions and varieties collected before 1957 were highly or extremely susceptible to rust. Five Russian kryazhs and cv. ‘GDS-3’ developed at VIR were found to retain rust resistance up to the present moment. Lines derived from them and from three foreign varieties, with an identified number of the original effective R genes, were submitted to breeders. Nineteen donors with a set of economically useful traits, analogous to cvs. ‘Orshansky 2’ and ‘Prizyv 81’ and carrying the same genes, were produced and distributed to breeders. The VIR collection holds 10 donors of rust resistance with high fiber content developed at the All-Russian Research Institute of Flax. Some donors of resistance to other diseases released by the same Institute also possess high rust resistance, thus forming a rich stock of source material. The first cultivar relatively resistant to rust (‘L-1120’) was released in 1951. Possessing polygenic resistance, it was also resistant to Fusarium wilt and lodging, so it was widely used for breeding other cultivars with similar characteristics. As their cultivation expanded, the harvest losses caused by rust dropped. The first rust-resistant cultivar with oligogenic resistance (‘Tomsky 16’) appeared in 1990. By now, many cultivars protected by R genes of rust resistance have been developed. They combine this trait with resistance to Fusarium and lodging, high yield, and high fiber content. Flax rust incidence is not a problem anymore.

Conclusion. Plant breeders have at their disposal a rich stock of source material preserved in the VIR collection to produce resistant flax cultivars. The use of rust resistance donors in hybridization cannot disrupt the most important properties of a cultivar.

1. Agriculture in Russia: Supplement to the compendium (Selskoye khozyaystvo v Rossii. Prilozheniye k sborniku). Federal State Statistic Service. Moscow; 2019. [in Russian] URL: https://www.gks.ru/folder/210/document/13226 [Аccessed on: 20.02.2020].

2. Krepkov A.P. Fiber flax breeding in Siberia: a monograph (Selektsiya lna-dolguntsa v Sibiri: monografiya). Tomsk: Tomsk State University; 2000. [in Russian]

3. Kurchakova L.N. The genetic potential of the VNIIL flax collection for the resistance to major fungal diseases (Geneticheskiy potentsial kollektsii lna VNIIL po ustoychivosti k osnovnym gribnym zabolevaniyam). In: Proceedings of the International Scientific and Practical Conference “Genetic Resources of Cultivated Plants” (Materialy mezhdunarodnoy nauchno-prakticheskoy konferentsii “Geneticheskiye resursy kulturnyh rasteniy”). St. Petersburg; 2001. p.327-328. [in Russian]

4. Kurchakova L.N. Environmental and genetic bases of flax breeding for the resistance to Septoria: a monograph (Ekologo-geneticheskiye osnovy selektsii lna na ustoychivost k septoriozu: monografiya). Tver: Tver State University; 2015. [in Russian]

5. Kutuzova S.N. Donors of rust resistance (Donory ustoychivosti k rzhavchine). Len i konoplya = Flax and Hemp. 1987;6:33- 35. [in Russian]

6. Kutuzova S.N. Fiber flax donors of rust resistance (Donory ustoychivosti lna-dolguntsa k rzhavchine). In: Identified Plant Genetic Diversity and Breeding (Identifitsirovanny genofond rasteniy i selektsiya). St. Petersburg; 2005. p.389-405. [in Russian]

7. Kutuzova S.N. Genes of rust resistance for fiber flax breeding (Geny ustoychivosti k rzhavchine dlya selektsii lna-dolguntsa). Byulleten VIR. Tekhnicheskiye kultury = Bulletin of VIR. Industrial Crops. 1981;3-6. [in Russian]

8. Kutuzova S.N. Genetic bases of flax breeding for rust resistance (Geneticheskiye osnovy selektsii lna na ustoychivost k rzhavchine). St. Petersburg; 2014. [in Russian]

9. Kutuzova S.N. Genetic basis of resistance to Melampsora lini (Pers.) Lev., the agent of flax rust, in domestic varieties of fibre flax. Agricultural Biology. 2012,5:70-77. [in Russian] DOI: 10.15389/agrobiology.2012.5.70rus

10. Kutuzova S.N. Resistance of released flax varieties to rust (Ustoychivost rayonirovannykh sortov lna-dolguntsa k rzhavchine). Len i konoplya = Flax and Hemp. 1979;2:13-15. [in Russian]

11. Kutuzova S.N., Brutch N.B., Porokhovinova E.A., Nizova G.K., Sharov I.Ya., Krat T.E. et al. Catalogue of the VIR global collection. Issue 714. Donors of agronomical characters for fiber flax breeding. St. Petersburg: VIR; 2000. [in Russian]

12. Kutuzova S.N., Porokhovinova E.A., Brutch N.B., Pavlov A.V. Localization of rust resistance genes in old local Russian flaxes by methods of classical genetics. Vavilov Journal of Genetics and Breeding. 2019;23(6):650-655. DOI: 10.18699/vj19.537

13. Pavlov A.V., Brutch N.B., Porokhovinova E.A., Kutuzova S.N. Fibre flax accessions of Chinese breeding as sources of valuable agronomic characters. Proceedings on Applied Botany, Genetics and Breeding. 2015;176(1):68-75. [in Russian] DOI: 10.30901/2227-8834-2015-1-68-75

14. Rozhmina T.A. Flax sources of rust resistance and their donor properties (Istochniki ustoychivosti lna-dolguntsa k rzhavchine i ikh donorskiye svoystva). Sbornik nauchnykh trudov VNIIL = Collection of Scientific Papers of the Flax Research Institute. 1988;25:35-38.

15. Rozhmina T.A., Zhuchenko A.A., Uschapovskiy I.V., Kurchakova L.N., Baskakov V.A., Kiseleva T.S. National collection of Russian flax and main trends of using the crop gene pool in breeding process (Natsionalnaya kollektsiya russkogo lna i osnovnye napravleniya ispolzovaniya genofonda kultury v selektsionnom protsesse). In: Fiber Flax Breeding, Seed Production and Agricultural Practice (Selektsiya, semenovodstvo i agrotekhnika lna-dolguntsa). Torzhok; 2002. p.72-81. [in Russian]

16. Shindin A.P., Zakharova L.M., Tikhomirova V.Ya., Pavlova L.N., Rozhmina T.A. Flax. Technologies of cultivation and protection against harmful organisms (Len. Tekhnologii vozdelyvaniya i zashchity ot vrednykh organizmov). Moscow; 2012. [in Russian]

17. Vavilov N.I. Plants’ immunity to infectious diseases (Immunitet rasteniy k infektsionnym zabolevaniyam). Izvestiya Petrovskoy selskokhozyaystvennoy akademii = News of Petrovskaya Agricultural Academy. 1918;1-4. [in Russian]

18. Zhivetin V.V., Ginsburg L.N., Olshanskaya O.M. Flax and its complex utilization (Len i yego kompleksnoye ispolzovaniye). Moscow; 2002. [in Russian]

19. Zhuchenko A.A., Rozhmina T.A., Ponazhov L.N., Pavlova L.N., Tikhomirova V.Ya., Sorokina O.Yu. Ecogenetic bases of fiber flax breeding (Ekologo-geneticheskiye osnovy selektsii lna-dolguntsa). Tver; 2009. [in Russian]