International Database for Barley Genes and Barley Genetic Stocks

BGS 673, Corn stalk 1, cst1

BGN  41:199
Stock number: BGS 673
Locus name: Corn stalk 1
Locus symbol: cst1

Previous nomenclature and gene symbolization:

Corn stalk = cs (2).


Monofactorial recessive (2, 4).
Location in chromosome 5HL (1, 2); cst1.a is associated with the T2-7b and T6-7c translocation breakpoints (2); cst1.a is associated with SNP markers 2_0653 to 2_1452 (positions 199.0 to 244.39 cM) in 5HL bins 11 to 13 of the Bowman backcross-derived line BW197 (1).


The cst1.a mutant produces a semidwarf uniculm plants with thick culms in six rowed barley, which have moderate to very low seed set (4). As cst1.a gene was backcrossed into two-rowed barley Bowman, an increase in tillering and improved seed set were observed. Plants of the Bowman backcross-derived line BW197 were about 3/4 normal height and had very compact spikes, 2.8 vs. 4.5 mm. Awns, peduncles, and leaf blades of BW197 were about 3/4 the length of those of Bowman. Kernels of BW197 were slightly shorter than those of Bowman and the average seed weight was 4.5 vs. 5.7 mg. Grain yields of BW197 were very low (3).

Origin of mutant:

An X-ray induced mutant in Husky (CIho 9537) (2).

Mutational events:

cst1.a in Husky (CIho 9537) (2).

Mutant used for description and seed stocks:

cst1.a in LACZ95469, a six-rowed genetic stock from Lacombe, Alberta (4); cst1.a from LACZ95469 in Bowman (PI 483237)*5 (BW197, NGB 22029).


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. Enns, H. 1961. Inheritance and linkage studies in barley using chromosomal interchange and marker stocks. Ph.D. Thesis, Univ. of Saskatchewan, pp 70.

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 Franckowiak, J.D. (Unpublished).

4. Wolfe, R.I. (Personal communications).


J.D. Franckowiak 2011. Barley Genet. Newsl. 41:199.