International Database for Barley Genes and Barley Genetic Stocks
BGS 304, White streak 2, wst2
Stock number: BGS 304
Locus name: White streak 2
Locus symbol: wst2
Previous nomenclature and gene symbolization:
White streak 2 = wst2 (3).
Monofactorial recessive (3).
Located in chromosome 5HL (3); wst2.b is about 3.6 cM proximal from the srh1 (short rachilla hair 1) locus (3). Based on retained molecular markers, the wst2.b allele was not retained during backcrossing in the Bowman backcross-derived line BW911 (1).
When plants are grown at low temperatures, mutants exhibited wide and numerous white stripes on the developing leaves and plants become almost albinic or chlorotic. Exposure to 3 C for about two weeks immediately after sowing induced on the first and second leaf blades distinct streaks. As temperatures rise, subsequent leaf blades had only a few narrow white stripes (3). Because of poor expression under warm environments, retention of the wst2.b mutant in the Bowman backcross-derived line, BW911, did not occur (2). However, the vrs5.n allele at the intermedium spike-c (int-c) was likely retained in BW911, based on spike phenotype and the presence of donor parent DArT markers in the region from 2_1385 to 2_1397 (positions 31.82 to 47.80 cM) in 4HS bins 03 to 05 (1, 2).
Origin of mutant:
A spontaneous mutant in a Japanese naked "uzu" cultivar grown on Manabe Island (3).
wst2.b in OUL067 (GSHO 766) (3).
Mutant used for description and seed stocks:
wst2.b in OUL067 (GSHO 766); wst2.b is unlikely to be in Bowman (PI 483237)*5 (GSHO 2102, BW911, NGB 22342).
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 Franckowiak, J.D. (Unpublished).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. Takahashi, R., and I. Moriya. 1969. Inheritance and linkage studies in barley. IV. Linkages of four variegated mutants. Ber. Ohara Inst. landw. Biol., Okayama Univ. 15:35-46.
T.E. Haus and T. Tsuchiya. 1971. Barley Genet. Newsl. 1:163.
J.D. Franckowiak and T. Konishi. 1997. Barley Genet. Newsl. 26:255.
J.D. Franckowiak. 2016. Barley Genet. Newsl. 46:83.