International Database for Barley Genes and Barley Genetic Stocks
BGS 350, Brachytic 6, brh6
Stock number: BGS 350
Locus name: Brachytic 6
Locus symbol: brh6
Previous nomenclature and gene symbolization:
Brachytic-r = brh.r (4).
Brachytic-s = brh.s (4).
Monofactorial recessive (5, 6).
Located in chromosome 5HL (1, 5); brh6.r is about 12.0 cM distal from SSR marker Bmag0394 in bin 5H-03 (1); brh6.r is associated with SNP markers 1_0688 to 2_1344 (positions 52.12 to 98.42 cM) in 5H bins 02 to 06 of the Bowman backcross-derived line BW097 (2); brh6.s is possibly associated with one SNP marker 1_0641 (position 108.33 cM) in 5H bin 06 of the Bowman backcross-derived line BW098 (2).
Plants of the Bowman backcross-derived line are 2/3 to 3/4 normal height and awns are 1/2 to 2/3 normal length. The seedling leaf of brh6 plants is shorter than that of normal sibs (1, 3). Peduncles and leaf blades are 2/3 normal length and the grain is nearly normal (1). However, kernels are nearly 20% lighter than those of Bowman with both decreased length and width (1, 3). Although grain yield of the near-isogenic line for brh6 was lower than those of tall Akashinriki, the brh6 line was considered a high yielding dwarf (8).
Origin of mutant:
An ethyl methanesulfonate induced mutant in Akashinriki (OUJ659, PI 467400) (7, 8).
brh6.r (OUM133, dw-h, DWS1036, GSHO 1683) in Akashinriki (OUJ659, PI 467400), brh6.s (OUM135, DWS1037, GSHO 1684) in Akashinriki (4, 6, 7).
Mutant used for description and seed stocks:
brh6.r (GSHO 1683, OUM133) in Akashinriki; brh6.s in Akashinriki (GSHO 1684, OUM135); brh6.r in Bowman (PI 483237)*7 (GSHO 2132, BW097, NGB 20503); brh6.s in Bowman*7 (GSHO 2131, BW098, NGB 20504).
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 Franckowiak, J.D. (Unpublished).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. 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, 1975. Verlag Karl Thiemig, München.
8. Konishi, T. 1977. Effects of induced dwarf genes on agronomic characters in barley. p. 21-38. In Use of dwarf mutations. Gamma-Field Symposium No. 16.
J.D. Franckowiak and T. Konishi. 2002. Barley Genet. Newsl. 32:111.
J.D. Franckowiak and L.S. Dahleen. 2007. Barley Genet. Newsl. 37:263.
J.D. Franckowiak. 2012. Barley Genet. Newsl. 42:408-409.