A Malting Barley (Hordeum Vulgare L.) Variety, ‘Nurimaeg’ with Resistance to Barley Yellow Mosaic Virus and Tolerance to Lodging Stress

Abstract

A malting barley variety, 'Nurimaeg', was developed with resistance to barley yellow mosaic virus (BaYMV), tolerance to lodging stress, and good brewing quality. 'Nurimaeg' was developed by crossing Milyang127 and Miharu gold in 2004. Regional yield trials were conducted for 'Nurimaeg' as a breeding line 'Iksan175' in four different regions from 2014-2016. It has a type I growth habit, and its average heading and maturity dates were April 12 and May 20, respectively-which were 1 day later than the maturity date of 'Hopum' variety. As 'Nurimaeg' has a shorter culm length (77 cm) than that of 'Hopum', it showed tolerance to lodging stress. This variety possesses the rym5 gene and is resistant to BaYMV. It showed a 42.9 g 1000-grain weight and 90% assortment ratio. The yield potential of 'Nurimaeg' was 408 kg/10a, which is approximately 18% higher than that of 'Hopum'. Analysis of grain quality for malting showed that 'Nurimaeg' has high quality of low protein and β-glucan content. Malt quality analysis revealed that it has 72.8% extract, 4.2% soluble protein, 38.9% kolbach index, and 243 WK diastatic power, which all were similar to those of 'Hopum'. 'Nurimaeg' would be suitable for cultivation in the areas of Korea that have a daily minimum temperature of -4℃ in the month of January (Registration No. 7960).