International Database for Barley Genes and Barley Genetic Stocks

BGS 225, Curled leaf dwarf 1, clh1

BGN  48:109
Stock number: BGS 225
Locus name: Curled leaf dwarf 1
Locus symbol: clh1

Previous nomenclature and gene symbolization:

Curled leaf dwarf = chl (4).


Monofactorial recessive (4).
Located likely in chromosome 7HL (1); clh1.a is associated donor parent SNP markers 1_1243 to 2_0365 (positions 167.56 to 229.66 cM) in 7H bins 10 to 13 in Bowman backcross-derived line BW182 (1), but a small group of donor parent SNP markers 1_1456 to 2_1177 (positions 195.82 to 203.85 cM) in 5H bin 11 are retained in BW182 (1). The chl1.a mutant was previously reported as located in chromosome 1H (3, 4), and clh1.a was linked by about 7.0 cM to the msg1 (male sterile genetic 1) locus (4).


Leaf blades are erect, narrow and folded inward and appear thicker than normal. Plants show reduced vigor, fertility, and height (3/4 of normal) when grown in the greenhouse; further reduction in vigor, and fertility is observed when mutants are grown in the field. Spikes emerge poorly from the boot (2). Plants of the Bowman backcross-derived line for clh1.a (BW182) were 30 to 40% shorter than Bowman. Kernels were slightly thinner and were about 2/3 normal weight. BW182 plants produced very little grain (2).

Origin of mutant:

A neutron induced mutant in Hannchen (PI 10585) (4).

Mutational events:

clh1.a (GSHO 1212) in Hannchen (PI 10585) (4).

Mutant used for description and seed stocks:

clh1.a (GSHO 1212) in Hannchen; clh1.a in Bowman (PI 483237, 22812)*2 (GSHO 2051); clh1.a in Bowman*5 (BW182, NGB 22014).


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. 2010. Genetic dissection of barley morphology and development. Plant Physiol. 155:617-627.
2. Franckowiak, J.D. (Unpublished).
3. Kasha, K.J. 1977. Coordinator's report: Chromosome 6. Barley Genet. Newsl. 7:89-90.
4. Ramage, R.T. 1962. Genetic and cytogenetic studies of barley. Barley Newsl. 6:67.


J.D. Franckowiak. 1997. Barley Genet. Newsl. 26:223.


J.D. Franckowiak. 2010. Barley Genet. Newsl. 40:76.
.D. Franckowiak. 2018. Barley Genet. Newsl. 48:109.