International Database for Barley Genes and Barley Genetic Stocks

BGS 636, Tip sterile 2, tst2

BGN  43:167
Stock number: BGS 636
Locus name: Tip sterile 2
Locus symbol: tst2

Previous nomenclature and gene symbolization:



Monofactorial recessive (5).
Located in chromosome 4HL (1); tst2.a is associated with SNP markers 2_0765 to 2_0732 (positions 127.80 to 134.44 cM) in 4H bins 09 to 10 of the Bowman backcross-derived line BW883 (1).


Spikes of tst2.b plants are 1/4 to 1/2 of normal length because seed set fails in the upper portion of the spike. Slow or poor development of the spike reduces both the number of rachis internodes and number of fertile spikelets (2, 5). Many spikes of the Bowman backcross-derived line for tst2.b (BW883) set less than 10 seeds. The BW883 plants are about 5/6 the height of normal sibs caused largely by shorter peduncles. Both rachis internode length and awn length are reduced in tst2 plants (2). Kernel weights are about 3/4 of normal and seed yields are about 1/5 those of Bowman (2). Heading dates are not delayed for BW883 (2).

Origin of mutant:

An X-ray induced mutant in Donaria (PI 161974) (4, 5).

Mutational events:

tst2.b (Mut. 2249, DWS1337, GSHO 1781) in Donaria (PI 161974) 3, 4).

Mutant used for description and seed stocks:

tst2.b (GSHO 1781) in Donaria; tst2.b in Bowman (PI 483237)*4 (GSHO 2280); tst2.b in Bowman*6 (BW883, NGB 22317).


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 Franckowiak, J.D. (Unpublished).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. Franckowiak, J.D., and A. Pecio. 1992. Coordinator’s report: Semidwarf genes. A listing of genetic stocks. Barley Genet. Newsl. 21:116-127.

4. Scholz, F. 1956. Mutationsversuche an Kulturpflanzen. V. Die Vererbung zweier sich variabel manifestierender Übergangsmerkmale von bespelzter zu nackter Gerste bei röntgeninduzierten Mutanten. Kulturpflanze 4:228-246.

5. Scholz, F., and O. Lehmann. 1958. Die Gaterslebener Mutanten der Saatgerste in Beziehung zur Formenmannigfaltigkeit der Art Hordeum vulgare L.s.l. I. Kulturpflanze 6:123-166.


J.D. Franckowiak and U. Lundqvist. 2002. Barley Genet. Newsl. 32:137.


J.D. Franckowiak. 2005. Barley Genet. Newsl. 35:193. (Locus symbol was changed from lin2.)
J.D. Franckowiak. 2007. Barley Genet. Newsl. 37:292.
J.D. Franckowiak. 2013. Barley Genet. Newsl. 43:167.