International Database for Barley Genes and Barley Genetic Stocks

BGS 126, Slender dwarf 1, sld1

BGN  41:103
Stock number: BGS 126
Locus name: Slender dwarf 1
Locus symbol: sld1

Previous nomenclature and gene symbolization:

Dwarf 1 = dw1 (3).
Light green dwarf = dw-1 (8).


Monofactorial recessive (4, 9).
Located in chromosome 3HL (6, 8, 9); sld1.a is over 6.3 cM distal from the uzu1 (uzu 1) locus (6, 8); sld1.a is about 20.5 cM distal from the uzu1 locus (8); sld1.a is about 1.2 cM from AFLP marker E3634-8 in subgroup 27 of the Proctor/Nudinka map (7); sld1.a is associated with SNP markers 2_1402 to 2_0362 (positions 77.00 to 119.10 cM) in 3H bins 05 to 07 of the Bowman backcross-derived line BW859 (1); sld1.a with uzu1.a is associated with SNP markers 1_0653 to 2_0115 (positions 92.55 to 126.83 cM) in 3H bins 06 to 08 of the Bowman backcross-derived line BW860 (1); sld1.c is associated with SNP markers 2_1145 to 2_0093 (positions 65.96 to 127.91 cM) in 3H bins 05 to 08 of the Bowman backcross-derived line BW861 (1); BW859 and BW860 have a common SNP patterns from 2_0017 to 2_0362 (positions 106.46 to 119.10 cM) in 3H bin 07 (1), in 3H bin 07.


Plant height is reduced to about 1/2 to 2/3 of normal, plant development is delayed, and plants are slightly yellow green in color (3, 8). Plants of the mutant sld1.a (dw-a, OUM148) headed 4 days later and were shorter, 81 vs. 122 cm, than their parent, Akashinriki (5). Kernel weights and kernels per spike of sld1.a plants were reduced and grain yields were 30% lower (5). The distribution of leaves in sld1 plants was altered because the peduncle is relatively long in proportion to the other internodes. Plants homozygous for the sld1.c allele were slightly weaker and shorter than sld1.a plants in their respective Bowman backcross-derived lines, BW861 and BW859 (2). Heading was delayed about 5 days in both BW859 and BW861. BW859 plants exhibited about 30% reduction in plant height, but had about 3 more kernels per spike. Kernel weights for BW859 were 5 to 15% lower than those of Bowman and grain yields ranged from 1/3 to 90% those of Bowman. Plants of BW861 showed a 40% reduction in plant height compared to Bowman, spikes had an average of 2 more kernels, kernel weights were 10 to 25% lower, and grain yield ranged from 10 to 75% those of Bowman (2).

Origin of mutant:

An ethyl methanesulfonate induced mutant in Akashinriki (OUJ659, PI 467400) (3).

Mutational events:

sld1.a (dw-a, OUM148, GSHO 2488) in Akashinriki (OUJ659, PI 467400) (3, 6); sld1.c (862PK, GSHO 2489) in Plena (PI 321822) (2, 8).

Mutant used for description and seed stocks:

sld1.a (GSHO 2488, OUM148) in Akashinriki sld1.a in Bowman (PI 483237)*7 (GSHO 1970); sld1.a in Bowman*8 (BW859, NGB 22296); sld1.c in Bowman*7 (GSHO 1972, BW861, NGB 22298); sld1.a with uzu1.a (OUM148, GSHO 2489) from Akashinriki in Bowman*8 (GSHO 1971, BW860, NGB 22297).


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. Franckowiak, J.D. (Unpublished).
3. Konishi, T. 1970. Studies on EMS-induced mutation in barley III. Nogaku Kenkyu 53:141-152.
4. Konishi, T. 1975. Characteristics and inheritance of EMS-induced mutants in barley. Nogaku Kenkyu 55:53-56.
5. Konishi, T. 1976. The nature and characteristics of EMS-induced dwarf mutants in barley. p. 181-189. In H. Gaul (ed.). Barley Genetics III. Proc. Third Int. Barley Genet. Symp., Garching, 7-12 July 1975. Verlag Karl Thiemig, München.
6. Konishi, T., J. Hayashi, I. Moriya, and R. Takahashi. 1984. Inheritance and linkage studies in barley. VII. Location of six new mutant genes on chromosome 3. Ber. Ohara Inst. landw. Biol., Okayama Univ. 18:251-264.
7. Pozzi, C., D. di Pietro, G. Halas, C. Roig, and F. Salamini. 2003. Integration of a barley (Hordeum vulgare) molecular linkage map with the position of genetic loci hosting 29 developmental mutants. Heredity 90:390-396.
8. Szarejko, I., and M. Maluszynski. 1984. Two new dwarfism genes on barley chromosome 3. Barley Genet. Newsl. 14:35-38.
9. Takahashi, R., J. Hayashi, T. Konishi, and I. Moriya. 1975. Linkage analysis of barley mutants. Barley Genet. Newsl. 5:56-60.


T. Konishi and J.D. Franckowiak. 1997. Barley Genet. Newsl. 26:162.


J.D. Franckowiak. 2011. Barley Genet. Newsl. 41:103-104.