The Pub (Hordeum) Gene
Gene Class : Pubescent leaf blade
Pub pubescent phenotype
(dominant)

 pub non-pubescent phenotype
(recessive)

Description:
Both the upper and lower surface of the leaf blade have widely scattered, short (1 to 2 mm) hairs. The hairs tend to be aligned along the smaller leaf veins. The hairs are more difficult to observe on older leaves or plants grown in the field. Some accessions of Hordeum vulgare subsp spontaneum have numerous short hairs on both surfaces of the leaf.
Description courtesy of the Barley Genetics Stocks AceDB Database

Links:
Barley Genetics Stocks AceDB Database
GrainGenes Gene Record

Reference:
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 127