International Database for Barley Genes and Barley Genetic Stocks
BGS 586, Bracteatum-d, bra-d
Stock number: BGS 586
Locus name: Bracteatum-d
Locus symbol: bra-d
Previous nomenclature and gene symbolization:
None.
Inheritance:
Monofactorial recessive (3).
Located in chromosome 1HL (7); bra-d.7 is about 4.1 cM from AFLP marker E3634-7 (7); probably in 1H bin 14 based on the association with trd1 (third outer glume 1) (4, 7); bra-d.7 is associated with SNP markers 1_0041 to 2_0772 (positions 199.04 to 205.07 cM) in 1HL bin 14 of the Bowman backcross-derived line BW070 (1), in 1H bin 14.
Located in chromosome 1HL (7); bra-d.7 is about 4.1 cM from AFLP marker E3634-7 (7); probably in 1H bin 14 based on the association with trd1 (third outer glume 1) (4, 7); bra-d.7 is associated with SNP markers 1_0041 to 2_0772 (positions 199.04 to 205.07 cM) in 1HL bin 14 of the Bowman backcross-derived line BW070 (1), in 1H bin 14.
Description:
The characteristic trait of this mutant is the presence of a bract (third outer glume) outside the two empty glumes of the central spikelet. The bract subtending the lowest spikelet is always the largest, embracing in some cases about one-half the spike. Bracts become progressively smaller toward the tip of the spike. Mutants have elongated basal rachis internodes (5, 6). Pozzi et al. (7) suggested that bra-d.7 is allelic to trd1 (third outer glume 1) or near the trd1 locus. Allelism studies demonstrated that bra-d.7 is not an allele at the trd1 locus (5). Compared to Bowman backcross-derived lines with trd1 mutants, the Bowman backcross-derived line for bra-d BW070 had slightly shorter peduncles, 5 or more fertile rachis nodes per spike, and slightly shorter awns. Compared to Bowman, kernel weights for BW070 were 10 to 15% and grain yield were about one half (2).
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Origin of mutant:
An ethylene imine induced mutant in Foma (NGB 14659, CIho 11333) (5).
Mutational events:
bra-d.7 (NGB 114310, GSHO 1696) in Foma (NGB 14659, CIho 11333) (5).
Mutant used for description and seed stocks:
bra-d.7 (NGB 114310, GSHO 1696) in Foma; bra-d.7 in Bowman (PI 483237)*3 (GSHO 2185, BW070, NGB 20478).
References:
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 Physiology. Epubl. 2010 November 18, 2010 as DOI:10.1104/pp110.166249.
2. Franckowiak, J.D. (Unpublished).
3. Gustafsson, Å., A. Hagberg, U. Lundqvist, and G. Persson. 1969. A proposed system of symbols for the collection of barley mutants at Svalöv. Hereditas 62:409-414.
4. Kleinhofs, A. 2006. Integrating molecular and morphological/physiological marker maps. Barley Genet. Newsl. 36:66-82.
5. Lundqvist, U. (Unpublished).
6. Nybom, N. 1954. Mutation types in barley. Acta Agric. Scand. 4:430-456.
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.
2. Franckowiak, J.D. (Unpublished).
3. Gustafsson, Å., A. Hagberg, U. Lundqvist, and G. Persson. 1969. A proposed system of symbols for the collection of barley mutants at Svalöv. Hereditas 62:409-414.
4. Kleinhofs, A. 2006. Integrating molecular and morphological/physiological marker maps. Barley Genet. Newsl. 36:66-82.
5. Lundqvist, U. (Unpublished).
6. Nybom, N. 1954. Mutation types in barley. Acta Agric. Scand. 4:430-456.
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.
Prepared:
U. Lundqvist and J.D. Franckowiak. 1997. Barley Genet. Newsl. 26:513.
Revised:
U. Lundqvist and J.D. Franckowiak. 2007. Barley Genet. Newsl. 37:284.
U. Lundqvist and J.D. Franckowiak. 2010. Barley Genet. Newsl. 40:139-140.
U. Lundqvist and J.D. Franckowiak. 2010. Barley Genet. Newsl. 40:139-140.
