International Database for Barley Genes and Barley Genetic Stocks

BGS 343, Leafy bract 1, Lfb1

BGN  41:140
Stock number: BGS 343
Locus name: Leafy bract 1
Locus symbol: Lfb1

Previous nomenclature and gene symbolization:

Leafy bract = Lfb (3).


Monofactorial dominant (3) with variable expressivity.
Located in chromosome 5HL (4); Lfb1.a is about 7.5 cM from the srh1 (short rachilla hair 1) locus (4); Lfb1.a is associated with SNP markers 2_0645 to 2_0850 (positions 134.85 to 157.13 cM) in 5H bins 08 to 09 of the Bowman backcross-derived line BW478 (1).


A leaf-like bract forms at the collar below the spike. The size of the leaf-like bract may vary from vestigial to 5 cm or longer (3, 4). Tiller to tiller variation in bract size occurs and the bract is often larger in cultivars having six-rowed spikes (2). The agronomic and morphological traits of Bowman backcross-derived line for the Lfb1.a mutant, BW478, were similar to those of Bowman (2).

Origin of mutant:

An induced mutant in Montcalm (CIho 7149) (3).

Mutational events:

Lfb1.a (GSHO 1577) in Montcalm (CIho 7149) (3).

Mutant used for description and seed stocks:

Lfb1.a (GSHO 1577) in Montcalm; Lfb1.a in Bowman*7 (GSHO 2152, BW478, NGB 20706).


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 Franckowiak, J.D. (Unpublished).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. Walker, G.W.R., K. Kasha, and R.A. Miller. 1958. Recombination studies in barley. Proc. Genet. Soc. Can. 3:41-43.
4. Walker, G.W.R., J. Dietrich, R. Miller, and K.J. Kasha. 1963. Recent barley mutants and their linkages II. Genetic data for further mutants. Can. J. Genet. Cytol. 5:200-219.


J.D. Franckowiak. 1998. Barley Genet. Newsl. 28:30.


J.D. Franckowiak. 2011. Barley Genet. Newsl. 41:140.