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Bulgarian Journal of Crop Science   ISSN 0568-465X
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New genetic diversity of winter two-row barley lines resistant to Loose smut Ustilago nuda (Jensen) Rostrup
Toshka Popova, Darina Valcheva
Abstract: The creation of resistant barley cultivars leads to reduction in direct yield losses and limits the accumulation of infection in crops. Studies of new genetic plasma make it possible to find forms that can serve as starting material for the creation of a future disease-resistant cultivar. In the period 2012/2014, in competitive variety experiments, perspective lines of winter two-row barley resistant to loose smut (Ustilago nuda (Jensen) Rostrup) were studied. The experiment was based on the method of the Latin rectangle, with a plot of 10 sq m, in four repetitions, with standards Obzor, Emon and Kaskadyor 3. The yield was reported and the results were statistically processed. Grain quality was determined on the basis of the following indicators: 1000-grain weight (g) by weight method, uniformity 1st class (%), expressed as the ratio of the weight of grains remaining on sorting sieves 2.8 mm wide and 2.5 mm to the total weight in a sample of 100 g, protein content (%) (Kjeldahl method), extract content (%) according to EBC (1998). The relationship between grain yield and quality in perspective lines resistant to loose smut (Ustilago nuda (Jensen) Rostrup) was studied by correlation and principle component analysis using software SPSS 19.0 and Statgraf 2.1. As a result, winter barley lines resistant to loose smut (Ustilago nuda (Jensen) Rostrup) were created. Perspective lines PG 4480, PG 4447 and PG 4628 combine resistance to loose smut (Ustilago nuda (Jensen) Rostrup), high productivity and grain quality. They can be successfully used in the barley breeding program as parent components for creating new cultivars.
Keywords: genetic diversity; loose smut; two-row barley
Date published: 2023-12-19
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