Features of seed productivity of Digitalis lanata Ehrh. Cultivars from VILAR collection

Collection of the gene pool of Digitalis lanata Ehrh. in VILAR has 5 cultivars and more than 20 varieties. The article presents the results of a study of seed productivity of plants during reproduction of the collection in 2013-2015. The preservation of homogeneity and typical collectible genotypes is implemented in a controlled pollination with the varietal identification of plants based on methods of Digitalis lanata tests for distinctness, uniformity, stability. Infructescences harvested are the drying and partial opening of fructs in the lower third of the stems. The period of post-harvest ripening was 14-21 days. The study revealed that cultivar characteristics, such as the number and length of inflorescences and developing infmctescence, the number and size of fruit in the infmctescence, being typical and unique features for each of the cultivars. determine the value of seed productivity indicators (seed weight with single infmctescence, with per plant and units of area). Infmctescence length ranged from 28 cm in cultivar ‘Victoria’ to 53 cm in cultivar ‘Karikola’. The number of fmit on the stem varied from 28 fruit of the cultivar ‘Victoria’ to 102 fmit of the cultivar ‘Ritm’. The number of seeds in a fmit - from 58 seeds (cultivar ‘Victoria’) to 116 seeds (cultivar ‘Ritm’). Weight of seeds from a single infmctescence varied from 0,67 g for the cultivar ‘Victoria’ to 4.7 g for the cultivar ‘Ritm’. Weight of seeds with infmctescence was 0.67 - 4.70 g, the collection of seeds from individual plant was 7-23 g. The seed yield was 37 - 90 g/m², depending on the cultivar. Study of correlation of morphological and agronomic traits revealed a dependence of plant seed productivity from the weight of seeds with one stem (r=0.80), number of stems (r=0.54), the length of stems (r=0.21). The mass of 1000 seeds slightly differed, from 0.48 g to 0.52 g, as well as the mass of seeds from a single infmctescence from 0.028 g to 0.090 g. The certainty of seed productivity cultivar characteristics ensures the success of the periodic reproduction of the D. lanata preserved biological collection.

1. Vichkanova S.A., Kolkhir VK., Sokolskaya, TA., Voskoboynikov I.B., Bykov VA.. Medicinal products from plants: scientific publication. Moscow: ADRIS. 2009: 338.

2. State register of protected breeding achievements approved for use. Vol. "Varieties of plants" (official edition). Moscow: Rosinformagrotech, 2016. 504 p.

3. Korotkikh I.N., Khazieva FM. Identification of varieties of Digitalis lanata Ehrh. gene pool on the complex of morphological features // Proceedings of the international scientific and practical conference "Ways to improve the competitiveness of domestic varieties, seeds, planting material and technologies in the world market", Yalta. Proceedings of the Kuban State Agrarian University. 2015. 4 (55): 119-123.

4. Korotkikh I.N., Khazieva F.М. Seed productivity of Digitalis lanata Ehrh. at different types of pollination // Proceedings of the II International scientific-practical conference "Modern biology: topical issues", scientific Fund "Biologist", St. Petersburg. 2014. 2: 23-24.

5. Menshova V, BerezkinaV., RudikG. Introduction of the genus Digitalis L. in Botancial garden im. Acad. O.V. Fomin. Kiev: Kievsk. un-t. 2007: 109-111.

6. Methods of Digitalis lanata tests for distinctness, uniformity, stability. Official bulletin of the State Comission for variety testing. 2003. 6 (86): 480-485

7. Digitalis / Ed. N.Ja. Itskov and A.D. Turova. М.: Medgiz, 1954: 219.