International Database for Barley Genes and Barley Genetic Stocks

BGS 548, Angustifolium-b, Fol-b

BGN  48:161
Stock number: BGS 548
Locus name: Angustifolium-b
Locus symbol: Fol-b

Previous nomenclature and gene symbolization:

Angustifolia = Ang (4).


Monofactorial incomplete dominant (3).
Location in chromosome 1H based on trisomic analysis (3); Fol-b.2 is associated with on SNP markers 2_0502 to 2_1226 (positions 3.18 to 13.50 cM) in 1H bins 01 to 02 of a heterozygous plant from the Bowman backcross-derived line BW371 (1).


Homozygous plants are very weak with short thread-like leaves and often die at the 3 to 4 leaf stage. Heterozygotes have narrow leaves, small spikes and kernels, but vigor is good, and fertility is normal (3). Heterozygous plants of the Bowman backcross-derived stock for Fol-b.2 (BW371) are about 3/4 of normal height, heading is delayed a few days, and grain yields are low. The rachis internodes of heterozygotes are slightly elongated, awns are slightly shorter, and kernels per spike are 2 to 4 fewer. Heterozygotes of the BW371 stock have thin kernels that are about 1/2 of normal weight. The Fol-b.2 gene needs to be maintained in a heterozygous stock (2).

Origin of mutant:

A spontaneous mutant in an unknown six-rowed cultivar (3), .
A spontaneous mutant in an unknown six-rowed cultivar (3), possibly Mars (CIho 7015) based on retained SNP molecular markers (1, 2).

Mutational events:

Fol-b.2 (GSHO 17) in an unknown cultivar (4).

Mutant used for description and seed stocks:

Fol-b.2 (GSHO 17) in an unknown cultivar; Fol-b.2 in Bowman (PI 48323, NGB 22812)*1 (GSHO 2265); Fol-b.2 in Bowman*6 (BW371, NGB 20610).


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 Physiol. 155:617-627.
2. Franckowiak, J.D. (Unpublished).
3. Tsuchiya, T., and R.L. Haines. 1975. Trisomic analysis of nine mutant genes in barley. Barley Genet. Newsl. 5:67-69.
4. Tsuchiya, T., S.D. Tanksley, and R. Ward. 1976. Trisomic analysis of three mutant genes in barley. Barley Genet. Newsl. 6:95.


J.D. Franckowiak. 1997. Barley Genet. Newsl. 26:474.


J.D. Franckowiak. 2010. Barley Genet. Newsl. 40:131.
J.D. Franckowiak. 2018. Barley Genet. Newsl. 48:161.