Genetic studies on resistance to barley [Hordeum vulgare] yellow mosaic virus (BaYMV) in barley
1996
Konishi, T. (Kyushu Univ., Fukuoka (Japan). Faculty of Agriculture)
Barley yellow mosaic virus (BaYMV) is one of the most serious soil-borne viruses for two-rowed malting barley in EAst Asia and winter barley in Europe. The virus is differentiated into several stains. Recently, a similar trouble occurs independently in Japan and Europe: A new virulent strain of the virus appears in areas growing a cultivar which is resistant to the ordinary strains, resulting in the resistant variety changes to susceptible. In addition, a similar but different soil-borne virus called barley mild mosaic virus (BaMMV) appears, and the differentiation of strains is further recognized in this virus. Genetic analysis of resistance to BaYMV has been conducted, especially for the resistance genes derived from two landraces, Mokusekko 3 and Ragusa. One of the resistance genes in Mokusekko 3 is tightly linked with the complex locus for esterase isozymes on chromosome 3 L. The resistance gene ym4 in Ragusa in also linked to the esterase complex locus, and more closely linked to MWG 10 of RFLP and OP-Z 04 H 660 of RAPD markers, respectively. These markers are very useful to combine different resistance genes into a cultivar for stabilizing resistance
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