International Database for Barley Genes and Barley Genetic Stocks

BGS 35, Reaction to barley stripe mosaic virus 1 (BSMV), rsm1

BGN  48:71
Stock number: BGS 35
Locus name: Reaction to barley stripe mosaic virus 1 (BSMV)
Locus symbol: rsm1

Previous nomenclature and gene symbolization:

Resistance to barley stripe mosaic virus = sm (2).


Monofactorial recessive (4).
Located in chromosome 7HS (1, 4); rsm1.a is over 24.3 cM distal from the nud1 (naked caryopsis 1) locus (4); rsm1.a is over 28.2 cM from the lks2 (short awn 2) locus (4); rsm1.a co-segregated with RFLP marker ABC455 (1).


Reaction to BSMV is estimated as the frequency or percentage of plants infected following inoculation of barley seedlings with a specific strain of BSMV. Highly resistant cultivars produce few or no infected plants 7 to 14 days after inoculation (3). Most or all seedlings of highly susceptible cultivars produce broad mosaic stripes within 7 days after inoculation (3). Several genes control reaction to BSMV and show additive inheritance patterns (2, 5). The study of progeny from crosses between resistant and moderately susceptible cultivars indicated that one recessive factor controls the frequency of infected plants following inoculation with strain CV42 (1, 4). The presence of virus in protoplasts after inoculation with BSMV strains is associated with susceptibility to these virus strains (6).
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Origin of mutant:

Natural occurrence in Modjo 1 (CIho 14048) and Moreval (PI 95258) (2, 5).

Mutational events:

rsm1.a in Modjo 1 (CIho 14048) (2, 4, 5).

Mutant used for description and seed stocks:

rsm1.a in Modjo 1; rsm1.a in Morex (CIho 15773, GSHO 2492) (1); rsm1.a is present in Bowman (PI 483237, NGB 22812).


1. Edwards, M.C., and B.J. Steffenson. 1996. Genetics and mapping of barley stripe mosaic virus resistance in barley. Phytopathology 86:184-187.
2. Sisler, W.W., and R.G. Timian. 1956. Inheritance of barley stripe mosaic resistance in Modjo (C.I. 3212) and C.I. 3212-1. Plant. Dis. Rep. 40:1106-1107.
3. Timian. R.G. 1974. The range of symbiosis of barley and barley stripe mosaic virus. Phytopathology 64:342-345.
4. Timian, R.G., and J.D. Franckowiak. 1987. Location of a factor for barley stripe mosaic virus reaction on chromosome 1. Barley Genet. Newsl. 17:79-82.
5. Vasquez, G.G., G.A. Peterson, and R.G. Timian. 1974. Inheritance of barley stripe mosaic reaction in crosses among three barley varieties. Crop Sci. 14:429-432.
6. Zheng, Y., and M.C. Edwards. 1990. Expression of resistance to barley stripe mosaic virus in barley and oat protoplasts. J. Gen. Virol. 71:1865-1868.


J.D. Franckowiak and M.C. Edwards. 1997. Barley Genet. Newsl. 26:84.


J.D. Franckowiak. 2018. Barley Genet. Newsl. 48:71.