Rosana – a new variety of alfalfa (Medicago sativa L.)

  • V. D. Bugayov
  • V. M. Gorensky
  • V. S. Mamaliga
  • A. M. Maximov
DOI: https://doi.org/10.7124/FEEO.v23.985

Abstract

Aim. Lucerne sowing in Ukraine is one of the most common fodder crops from perennial legumes. Most varieties grown today are not sufficiently adapted to a number of unfavorable abiotic and biotic environmental factors. Rosana variety was created to solve some of the above problems under the conditions of the Polissya and the forest-steppe of Ukraine. Methods. 560 plants, differing in high winter resistance and a set of economic and valuable features, were selected from the grassland of Regent's varieties of alfalfa, created in previous years from genetic plasma of varieties WL 202 (USA) and Veselopodolianska 11 (Ukraine). During the four study cycles, gumboil counts were carried out at the level of green mass and seed yield, leafyness, resistance to pathogens of root rot and other diseases, intensity of regrowth in spring and autumn. Results. The Rosana variety is similar to the Regina variety in the form of a bush, the size of leaves, the height of plants, the duration of individual phases of growth and development, and the class of rest. The variety is characterized by high intensity of regrowth, during the growing season can form 3–4 slopes, with increased feed quality, increased seed yield. Resistant to root rot, drought-proof and winter-resistant. Resistant to sinking. Medieval The period of productive longevity is 4–5 years. The height of the plants of the first slope is 80–90 cm. The yield of the seeds is 0.5 t / ha. Collection of dry matter – 14.5–15.0 t / ha. Protein content – 20.9 %, cellulose – 21.4 %. The first slope is 54–55 days. Clearness – 48 %. Conclusions. The quality of Rosana's fodder and seed yield is significantly higher than the Regina variety and the conditional standard. Characterized by a number of other economic and valuable features. It is recommended for distribution in Polissya and Forest-steppe zones of Ukraine in clean and mixed crops with other perennial herbs for the production of high-quality feed (haylage, hay, herbal pellets). Keywords: alfalfa crop, varietal, winter resistance, dry matter, seeds.

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