International Database for Barley Genes and Barley Genetic Stocks
BGS 244, Dense spike 11, dsp11
Stock number: BGS 244
Locus name: Dense spike 11
Locus symbol: dsp11
Previous nomenclature and gene symbolization:
Dense spike am = dsp.am (2).
Dense spike an = dsp.an (2).
Dense spike ao = dsp.ao (2).
Monofactorial incomplete dominant (2).
Located in chromosome 1HL (1); dsp11.am is associated with SNP markers 2_0798 to 1_0798 (positions 82.35 to 90.92 cM) in 1H bin 08 of the Bowman backcross-derived line BW260 (1); dsp11.ao is associated with SNP markers 2_1000 to 2_0956 (positions 76.28 to 98.23 cM) in 1H bins 08 to 09 of the Bowman backcross-derived line BW262 (1); dsp11.an is associated with SNP markers 1_0259 to 1_0466 (positions 70.78 to 119.29 cM) in 1H bins 07 to 10 of the Bowman backcross-derived line BW261 (1), likely in 1H bin 08.
All three Bowman backcross-derived lines with short rachis internodes were from crosses to Akashinriki and retained an overlapping region in 1HL. The line BW260 with dsp11.am was used for trait comparisons because other two lines also retained SNP markers on other chromosomes (1). In comparison to Bowman, plants of Bowman backcross-derived line BW260 were slightly shorter and had more compact spikes, rachis internode lengths 3.5 vs. 4.6 mm. Kernels were shorter, 8.6 vs. 9.7 mm, and about 10% lighter. Test weights were slightly lower and grain yields were about 3/4 those for Bowman. The other two Bowman backcross-derived lines in which the dsp11 segment was retained, BW261 (dsp11.an) and BW262 (dsp11.ao) plants had slightly shorter rachis internodes and kernels than Bowman. Kernels were about 30% lighter and yields were lower. BW261 plants were slightly taller than Bowman plants while BW262 was shorter (2). A common chromosome segment of 6HL was retained in both BW261 and BW262, with the SNP markers overlapping in the region from 1_0645 to 1_1187 (positions 190.38 to 195.01 cM) in 6H bin 11 (1).
Origin of mutant:
Natural occurrence in Akashinriki (OUJ659, PI 467400) (2), extracted from an ethyl methanesulfonate induced mutant (OUM070) of Akashinriki (3, 4).
dsp11.am (OUM070, GSHO 1722) in Akashinriki, dsp11.an (OUM105) in Akashinriki, dsp11.ao (OUM125, GSHO 1723) in Akashinriki (4).
Mutant used for description and seed stocks:
dsp11.am (OUM70, GSHO 1722) in Akashinriki; dsp11.am in Bowman (PI 483237)*4 (GSHO 2244), in Bowman*6 (BW260, NGB 22085); dsp11.an from Akashinriki in Bowman *4 (BW261, NGB 22086); dsp11.ao from Akashinriki in Bowman*6 (GSHO 2039), dsp11.ao in Bowman*8 (BW262, NGB 22087).
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.
J.D. Franckowiak. 2011. Barley Genet. Newsl. 41:121-122.