International Database for Barley Genes and Barley Genetic Stocks
BGS 39, Midseason stripe 2, mss2
Stock number: BGS 39
Locus name: Midseason stripe 2
Locus symbol: mss2
Previous nomenclature and gene symbolization:
Monofactorial recessive (3).
Located in chromosome 7HS (3); mss2.b is based on linkage drag with the Lga1 (Long glume awn 1) and dsp1 (dense spike 1) loci (3, 4); mss2.b was associated with only one unmapped SNP marker in Bowman backcross-derived line BW594 (1); likely in 7H bin 05 based on association with the Lga1 and dsp1 (ert-a) loci.
A variable number of broad, white stripes develop in tillers during the joining stage. Leaves and spikes show white sectors that persist until maturity. Expression of mss2 is temperature dependent with few or no stripes developing in cool environments and numerous white stripes in warm environments. When numerous stripes develop, spike length and plant vigor were much reduced (2). Plants of the Bowman backcross-derived line for mss2.b, BW594, had lower vigor than Bowman. Plants were 15% shorter and had narrower and shorter leaf blades. Kernels of BW594 were thinner and 10 to 20% lighter than those of Bowman. Grain yields of BW594 were 60 to 70% those of Bowman (2).
Origin of mutant:
A spontaneous mutant in breeding line ND11258 (Bowman*2/ND7556) (2).
mss2.b (GSHO 2409) in ND11258 (3).
Mutant used for description and seed stocks:
mss2.b (GSHO 2409) in ND11258; mss2.b in Bowman (PI 483237)*7 (GSHO 2148, BW594, NGB 22160).
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 Franckowiak, J.D. (Unpublished).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. 1995. Notes on linkage drag in Bowman backcross derived lines of spring barley. Barley Genet. Newsl. 24:63-70.
4. Kleinhofs, A. 1999. Coordinator’s report: Integrating barley molecular and morphological/physiological marker maps. Barley Genet. Newsl. 29:58-59.
J.D. Franckowiak. 2002. Barley Genet. Newsl. 32:79.
J.D. Franckowiak. 2014. Barley Genet. Newsl. 44:59.