International Database for Barley Genes and Barley Genetic Stocks

BGS 658, Brachytic 17, brh17

BGN  45:236
Stock number: BGS 658
Locus name: Brachytic 17
Locus symbol: brh17

Previous nomenclature and gene symbolization:

Semidwarf mutant = Mo4 (7).
Brachytic-ab = brh.ab (4).


Monofactorial recessive (4, 5).
Located in chromosome 5HS (1); brh17.ab is approximately 11.6 cM proximal from SSR marker Bmag0387 in 5H bin 03 (1). brh17.ab is associated with SNP markers 1_0688 to 2_1344 (positions 52.12 to 98.42 cM) in 5H bins 03 to 06 of the Bowman backcross-derived line BW088 (2).


Plants are about 3/4 normal height and awns are 5/6 of normal length. Peduncles are slightly shortened. Rachis internodes are about 20% shorter than those of normal sibs. Seedling leaves of brh17.ab plants are relatively short (1, 3). Compared to Bowman, kernels of the Bowman backcross-derived line for brh17.ab, BW088, were shorter (7.7 vs. 9.7 mm) and nearly 20% lighter, 5.0 vs. 5.9 mg. Lodging was reduced in BW088 and grain yields averaged 2/3 those of Bowman (1, 3). BW088 plants headed 1 to 2 days later than Bowman plants, were 10 to 15 cm shorter and had slightly shorter awns and peduncles (3).

Origin of mutant:

A sodium azide induced mutant in Morex (CIho 15773) (7).

Mutational events:

brh17.ab (Wa14355-83, Mo4, DWS1260, GSHO 1669) in Morex (CIho 15773) (5, 6)..

Mutant used for description and seed stocks:

brh17.ab (GSHO 1669) in Morex; brh17.ab in Bowman (PI 483237)*6 (GSHO 2181, BW088, NGB 20495).


1. Dahleen, L.S., L.J. Vander Wal, and J.D. Franckowiak. 2005. Characterization and molecular mapping of genes determining semidwarfism in barley. J. Hered. 96:654-662.

2. Druka, A., J. Franckowiak, U. Lundqvist, N. Bonar, J. Alexander, K. Houston, S. Radovic, F. Shahinnia, V. Vendrarnin, M. Morgante, N. Stein, and R. Waugh. 2011. Genetic dissection of barley morphology and development. Plant Physiol. 155:617-627.

3. Franckowiak, J.D. (Unpublished).

4. Franckowiak, J.D. 1995. The brachytic class of semidwarf mutants in barley. Barley Genet. Newsl. 24:56-59.

5. Franckowiak, J.D., and A. Pecio. 1992. Coordinator’s report: Semidwarf genes. A listing of genetic stocks. Barley Genet. Newsl. 21:116-127.

6. Nedel, J.L., S.E. Ullrich, J.A. Clancy, and W.L. Pan. 1993. Barley semidwarf and standard isotype yield and malting quality response to nitrogen. Crop Sci. 33:258-263.

7. Ullrich, S.E., and Aydin, A. 1988. Mutation breeding for semi-dwarfism in barley. p. 135-144. In Semi-dwarf Cereal Mutants and Their Use in Cross-breeding III. IAEA-TECDOC-455. IAEA, Vienna.


J.D. Franckowiak and L.S. Dahleen. 2007. Barley Genet. Newsl. 37:298.


J.D. Franckowiak. 2015. Barley Genet. Newsl. 45:236.