The Wst7 (Hordeum) Gene
Gene Class : White Striped Leaf
Wst7 normal phenotype
(dominant)
 wst7 mutant (striped) phenotype
(recessive)

Description:
 Vertical white streaks of variable width and number develop in the leaf blades of young secondary tillers. Fewer white streaks and fewer tillers with white streaks occur as environmental conditions become warm. White streaks can be found until near maturity, but they are difficult to observe after heading under field conditions. Often the lower or first leaves on early tillers have more and wider streaks.
Description courtesy of the Barley Genetics Stocks AceDB Database

Links:
Barley Genetics Stocks AceDB Database
GrainGenes Gene Record

References
J.D. Franckowiak, U. Lundqvist, and T. Konishi (1997) New and revised names for barley genes.  Barley Genetics Newsletter. Volume 26

Barley Genetic Stock Description: Stock number: BGS 79