International Database for Barley Genes and Barley Genetic Stocks

BGS 258, Dense spike 9, dsp9

BGN  47:107
Stock number: BGS 258
Locus name: Dense spike 9
Locus symbol: dsp9

Revised locus symbol:

The dsp9.i mutant is an allele at the ert-e (erectoides-e) locus based on allelism tests (2), phenotypic expression (2), and retained SNP markers in 6HL of the Bowman backcross-derived line (BW279) (1). See BGS 266 for more information about the alleles at the ert-e locus.

Previous nomenclature and gene symbolization:

Dense spike = la (3).
Dense spike 9 = l9 (3).


Monofactorial recessive (3).
Located in chromosome 6HL (3), dsp9.i is about 27.2 cM distal from the xnt5 (xantha seedling 5) locus (4); dsp9.i is over 26.9 cM distal from the Aat2 (Aspartate aminotransferase 2) locus (7); dsp9.i is associated with SNP markers 1_0645 to 2_1425 (positions 190.39 to 207.0 cM) in 6H bins 11 to 15 of the Bowman backcross-derived line BW279 (1).


Extremely dense spikes are easily distinguished from normal types when grown in the field or greenhouse (3). A photo of the original spike phenotypes is presented in Saisho and Takeda (6). The spike often emerges from the side of the sheath. Compared to Bowman, plants of the Bowman backcross-derived line for dsp9.i, BW279, were about 2/3 as tall and had very short rachis internodes, 2.3 vs. 4.6 mm. Peduncles averaged about 3/4 normal length, kernels were 10 to 20% lighter, and grain yields were about 2/3 those of Bowman (2).

Origin of mutant:

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

Mutational events:

dsp9.i (OUM113, GSHO 1774) in Akashinriki (OUJ659, PI 467400) (3); dsp9.j (OUM106), dsp9.k (OUM107), dsp9.l (OUM115), dsp9.m (OUM118) in Akashinriki (5).

Mutant used for description and seed stocks:

dsp9.i (GSHO 1774, OUM113) in Akashinriki; dsp9.i in Bowman (PI 483237)*7 (GSHO 2090, BW279, NGB 20563).


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 Franckowiak, J.D. (Unpublished).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. 1973. Genetic analyses of EMS-induced mutants in barley. Barley Genet. Newsl. 3:28-31.
4. Konishi, T. 1978. New linkage data on chromosome 6 of barley. Barley Genet. Newsl. 8:71-72.
5. Konishi, T. (Unpublished).
6. Saisho, D., and K. Takeda. 2011. Barley: Emergence of a new research material of crop science. Plant Cell Physiol. 52:724-727.
7. Yoshimi, R., and T. Konishi. 1995. Linkage analysis of several isozyme loci in barley. Barley Genet. Newsl. 24:35-37.


T. Konishi. 1976. Barley Genet. Newsl. 6:132.


T. Konishi and J.D. Franckowiak. 1997. Barley Genet. Newsl. 26:239.
J.D. Franckowiak. 2013. Barley Genet. Newsl. 43:114-115.
J.D. Franckowiak. 2017. Barley Genet. Newsl. 47:107-108.