大粒で主要病害に強い日本初の実用二条裸麦品種「ユメサキボシ」の育成

Abstract

A new two-rowed hullless barley cutivar "Yumesakiboshi" was bred by a bulk breeding method by crossing "Yon-R-Kei 833" and "Nishinochikara". Compared with "Ichibanboshi" , "Yumesakiboshi" had a similar culm length, longer spike length, similar heading date, and normally had a date of maturity 2 days later. The yield was similar to that of "Ichibanboshi". The practical yield (grain weight over 2.2 mm grain thickness) was 10% higher than that of "Ichibanboshi". "Yumesakiboshi" was resistant to barley yellow mosaic virus and powdery mildew and moderately resistant to scab. Compared with "Ichibanboshi" , the grain size was larger and the grain shape was slightly longer. The plump grain percentage was higher, pearling time was shorter, and the ratio of broken kernels was higher. "Yumesakiboshi" is adapted well for growing in flat areas of Central and Western Japan and was released as a recommended (authorized) variety in Saitama prefecture in 2009

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