International Database for Barley Genes and Barley Genetic Stocks
BGS 142, Brachytic 8, brh8
Stock number: BGS 142
Locus name: Brachytic 8
Locus symbol: brh8
Previous nomenclature and gene symbolization:
Brachytic-ad = brh.ad (4).
Inheritance:
Monofactorial recessive (4, 6, 7).
Located in chromosome 3HL (2, 5); brh8.ad is near the btr1 (non-brittle rachis 1) locus based on linkage drag (5); brh8.ad is about 26.3 cM proximal from SSR marker HVM60 in bin 3H-08 (1); brh8.ad is associated with SNP markers 2_0931 to 2_0657 (positions 104.39 to 141.21 cM) in 3H bins 07 to 09 of the Bowman backcross-derived line BW100 (2), likely in 3H bin 07.
Located in chromosome 3HL (2, 5); brh8.ad is near the btr1 (non-brittle rachis 1) locus based on linkage drag (5); brh8.ad is about 26.3 cM proximal from SSR marker HVM60 in bin 3H-08 (1); brh8.ad is associated with SNP markers 2_0931 to 2_0657 (positions 104.39 to 141.21 cM) in 3H bins 07 to 09 of the Bowman backcross-derived line BW100 (2), likely in 3H bin 07.
Description:
In the Bowman backcross-derived line, brh8 plants are 3/4 to 5/6 of normal height and awns are 2/3 to 3/4 of normal length. The peduncle is 3/4 normal length. The seedling leaf of brh8 plants is shorter and wider than those of normal sibs and the leaf blades are slightly wider. Kernels of brh8 plants are shorter than that of normal sibs and their weights are nearly15% lower. Heading dates are 2 or 3 days later, spikes have 3 to 4 more kernels, and rachis internodes are about 20% shorter. Grain yield is nearly normal (1, 3).
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Origin of mutant:
Probably a sodium azide induced mutant in Birgitta (NGB 1494, NGB 14667, NSGC 1870) (7).
Mutational events:
brh8.ad (17:16:1, DWS1008, GSHO 1671) in Birgitta (NGB 1494, NGB14667, NSGC 1870) (6, 7).
Mutant used for description and seed stocks:
brh8.ad (GSHO 1671) in Birgitta; brh8.ad in Bowman (PI 483237)*8 (GSHO 1944, BW100, NGB 20506).
References:
1. Dahleen, L.S., L.J. Vander Wal, and J.D. Franckowiak. 2005. Characterization and molecular mapping of genes determining semidwarfism in barley. J. Hered. 96:654-662.
2. 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.
3. Franckowiak, J.D. (Unpublished).
4. Franckowiak, J.D. 1995. The brachytic class of semidwarf mutants in barley. Barley Genet. Newsl. 24:56-59.
5. Franckowiak, J.D. 1995. Notes on linkage drag in Bowman backcross derived lines of spring barley. Barley Genet. Newsl. 24:63-70.
6. Franckowiak, J.D., and A. Pecio. 1992. Coordinator’s report: Semidwarf genes. A listing of genetic stocks. Barley Genet. Newsl. 21:116-127.
7. Lehmann, L.C. 1985. (Personal communications).
2. 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.
3. Franckowiak, J.D. (Unpublished).
4. Franckowiak, J.D. 1995. The brachytic class of semidwarf mutants in barley. Barley Genet. Newsl. 24:56-59.
5. Franckowiak, J.D. 1995. Notes on linkage drag in Bowman backcross derived lines of spring barley. Barley Genet. Newsl. 24:63-70.
6. Franckowiak, J.D., and A. Pecio. 1992. Coordinator’s report: Semidwarf genes. A listing of genetic stocks. Barley Genet. Newsl. 21:116-127.
7. Lehmann, L.C. 1985. (Personal communications).
Prepared:
J.D. Franckowiak. 2002. Barley Genet. Newsl. 32:92.
Revised:
J.D. Franckowiak and L.S. Dahleen. 2007. Barley Genet. Newsl. 37:230.
J.D. Franckowiak. 2012. Barley Genet. Newsl. 42:232.
J.D. Franckowiak. 2012. Barley Genet. Newsl. 42:232.
