International Database for Barley Genes and Barley Genetic Stocks

BGS 190, Thick filament 1 (male sterile genetic), tfm1

BGN  48:99
Stock number: BGS 190
Locus name: Thick filament 1 (male sterile genetic)
Locus symbol: tfm1

Previous nomenclature and gene symbolization:



Monofactorial recessive (2).
Located in chromosome 1HL (1); tfm1.a is associated with SNP markers 2_0603 to 2_0915 (positions 199.04 to 202.94 cM) in 1H bin 14 of a heterozygous plant from the Bowman backcross-derived line BW877 (1),


The filaments supporting the anthers are much thicker than normal, having a stalk-like appearance and a light green color. Since the filaments do not elongate, the mutant plants are largely male-sterile. Pollen fertility is apparently normal because mutant segregates will set a few seeds. Besides very poor seed, tfm1 plants in Bowman backcross-derived line BW877 appear normal (2).
No images

Origin of mutant:

A spontaneous mutant in the Volla (PI 280423) induced mutant 7060 backcrossed twice to Bowman (PI 483237, NGB 22812) (2).

Mutational events:

tfm1.a from Volla 7060/2*Bowman (2).

Mutant used for description and seed stocks:

tfm1.a from Volla 7060/2*Bowman (PI483237, NGB 22812); tfm1.a in Bowman*7 (BW877, NGB 22311).


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 Franckowiak, J.D. (Unpublished).


J.D. Franckowiak. 2010. Barley Genet. Newsl. 40:67.


J.D. Franckowiak. 2018. Barley Genet. Newsl. 48:99.