International Database for Barley Genes and Barley Genetic Stocks

BGS 196, Semidwarf 7, sdw7

BGN  43:103 Export to PDF
Stock number: BGS 196
Locus name: Semidwarf 7
Locus symbol: sdw7

Previous nomenclature and gene symbolization:

Semidwarf u = sdw.u (3).


Monofactorial recessive (4).
Located in chromosome 4HL (4); sdw7.u is based on linkage drag with the int-c (intermedium spike-c) locus (4); sdw7.u is associated with SNP markers 1_0738 to 2_1397 (positions 26.58 to 47.80 cM) in 4H bins 02 to 04 of the Bowman backcross-derived line BW821 (1).


The original sdw7.u mutant was isolated based on reduced plant height (2). Plants of the Bowman backcross-derived line for sdw7.u, BW821, had slightly longer rachis internodes than Bowman. Grain yields of BW821 were about 2/3 those of Bowman. Other morphological traits of BW821 were similar to those of Bowman (2).

Origin of mutant:

A sodium azide induced mutant in Glenn (CIho 15769) (2).

Mutational events:

sdw7.u (GSHO 2462, DWS1072, SA6102-2-4-8) in Glenn (CIho 15769) (2, 3).

Mutant used for description and seed stocks:

sdw7.u (GSHO 2462) in Glenn; sdw7.u in Bowman (PI 483237)*4 (GSHO 2000, BW821, NGB 22258).


1. Druka, A., J. Franckowiak, U. Lundqvist, N. Bonar, J. Alexander, K. Houston, S. Radovic, F. Shahinnia, V. Vendramin, M. Morgante, N. Stein, and R. Waugh. 2011. Genetic dissection of barley morphology and development. Plant Physiol. 155:617-627.
2. Faue, A.C. 1987. Chemical mutagenesis as a breeding tool for barley. M.S. Thesis. North Dakota State Univ., Fargo.
3. Franckowiak, J.D. (Unpublished).
4. Franckowiak, J.D. 1995. Notes on linkage drag in Bowman backcross derived lines of spring barley. Barley Genet. Newsl. 24:63-70.


J.D. Franckowiak. 2013. Barley Genet. Newsl. 43:103.