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BREEDING OF TRITICALE VARIETIES AND LINES FOR RESISTANCE TO BROWN RUST IN SAMARA Research institute of agriculture
Last modified: 2017-06-29
Abstract
Selections of individual plants in the milky phase of winter triticale in the years with exceeded threshold of brown rust harmfulness made it possible to obtain pathogen-resistant material. Of 8 varieties and lines tested in a competitive variety trial, 4 were resistant to brown rust, and 4 - susceptible. The yields of healthy varieties and lines varied from 24.5 to 25.5 cwt/ha; in the affected ones - from 17.8 to 21.7 cwt/ha. The recorded gain in the yield capacity was associated with an increase in the grain weight and number per spike by 0.24-1.07 g (13.1-69.9%) and by 3.0-13.3 seeds. (6.9-33.5%), respectively. Rust affection decreased the falling number by 27-73% and the amylogram height by 38-44%. The correlation analysis conducted for 2012-2014 revealed that brown rust negatively correlates with the yield (r = -0.60 ... -0.88 **), amylogram (r = -0.37 ... -0.67), falling number (r = -0.42 ... -0.46), grain number per spike (r = -0.44 ... -0.91), and the grain weight per spike (r = -0.65 ... -0.89).
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