International Database for Barley Genes and Barley Genetic Stocks
BGS 128, Short crooked awn 1, sca1
Stock number: BGS 128
Locus name: Short crooked awn 1
Locus symbol: sca1
Previous nomenclature and gene symbolization:
Monofactorial recessive (4).
Located in chromosome 3HS (4); sca1.a is about 1.4 cM distal from the alm1 (albino lemma 1) locus (3, 4); sca1.a is associated with SNP markers 2_0356 to 2_0566 (positions 72.36 to 114.82 cM) in 3H bins 05 to 07 of Bowman backcross-derived line BW769 (1); likely in 3H bin 05.
In the original stock, awns are reduced to a length of only 2 cm and are curved outward at the tip (4). Awn tips may have a stigma-like appearance in the original stock. In the Bowman backcross-derived line, awns are short (less than 1/4 normal), but awn tips are not curved or stigma-like (2). Plant vigor was partially restored in the Bowman backcross-derived line for sca1.a, BW769, but the awns remained very short, 2 vs. 12 cm. BW769 plants were 5 to 10% shorter than Bowman plants and headed about two days later. Kernels of BW769 were thin (3.05 vs. 2.82 mm in diameter) and light (34 vs. 56 mg); and the grain yields of BW769 were 10 to 50% of those for Bowman at various field locations (2).
Origin of mutant:
An ethyl methanesulfonate induced mutant in Akashinriki (OUJ659, PI 467400) (4).
sca1.a (OUM206, GSHO 2439)in Akashinriki (OUJ659, PI 467400) (3, 4).
Mutant used for description and seed stocks:
sca1.a (GSHO 2439) in Akashinriki; sca1.a in Bowman (PI 483237)*6 (GSHO 1951); sca1.a in Bowman*8 (BW769, NGB 22237).
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 Franckowiak, J.D. (Unpublished).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., J. Hayashi, I. Moriya, and R. Takahashi. 1984. Inheritance and linkage studies in barley. VII. Location of six new mutant genes on chromosome 3. Ber. Ohara Inst. landw., Biol. Okayama Univ. 18:251-264.
4. Moriya, I., and R. Takahashi. 1980. Linkage studies of three barley mutants. Barley Genet. Newsl. 10:47-51.
J.D. Franckowiak and T. Konishi. 1997. Barley Genet. Newsl. 26:164.
J.D. Franckowiak. 2014. Barley Genet. Newsl. 44:85.