International Database for Barley Genes and Barley Genetic Stocks

BGS 84, Midseason stripe 1, mss1

BGN  44:75
Stock number: BGS 84
Locus name: Midseason stripe 1
Locus symbol: mss1

Previous nomenclature and gene symbolization:



Monofactorial recessive (4), the deviation from 3:1 reported by Walker et al (3) may be caused by genotype-environment interactions.
Located in chromosome 5H (1); mss1.a is associated with SNP markers 1_1048 to 2_1344 (positions 46.35 to 98.421 cM) in 5H bins 02 to 06 of Bowman backcross-derived line BW593 (1); previously associated with chromosome 2H (3, 4), about 19.9 cM distal from the vrs1 (six-rowed spike 1) locus (3).


Broad yellow to ivory vertical streaks develop in the leaves of some tillers prior to heading (3, 4). Affected tillers are weaker and often abort under moderate to severe heat or moisture stress. In some environments, the whole plant becomes a golden yellow prior to maturation (2). Compared to Bowman, plants of the Bowman backcross-derived line for mss1.a, BW593, were morphologically similar in ‘good’ environments. However, in some environments, tillering was reduced and premature dying of BW593 plants occurred. Kernel weights for BW593 varied from 75% to equal to those of Bowman. Grain yields of BW593 varied from 30 to 85% of those recorded for Bowman (2).

Origin of mutant:

A gamma-ray induced mutant in Montcalm (CIho 7149) (4).

Mutational events:

mss1.a (Alb Acc 257, GSHO 1404) in Montcalm (CIho 7149) (3, 4).

Mutant used for description and seed stocks:

mss1.a (GSHO 1404) in Montcalm; mss1.a in Bowman (PI 483237)*2 (GSHO 1918); mss1.a in Bowman*6 (BW593, NGB 22159).


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 Franckowiak, J.D. (Unpublished).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., 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.
4. Walker, G.W., K. Kasha, and R.A. Miller. 1958. Recombination studies in barley. Proc. Genet. Soc. Can. 3:41-43.


J.D. Franckowiak. 1997. Barley Genet. Newsl. 26:122.


J.D. Franckowiak. 2014. Barley Genet. Newsl. 44:75.