International Database for Barley Genes and Barley Genetic Stocks

BGS 333, Reaction to Puccinia hordei 12 (barley leaf rust), Rph12

BGN  26:281
Stock number: BGS 333
Locus name: Reaction to Puccinia hordei 12 (barley leaf rust)
Locus symbol: Rph12

Previous nomenclature and gene symbolization:

Resistance to Puccinia hordei Otth 9 = Pa9 (1).


Monofactorial dominant (1, 2).
Located in chromosome 5HL (2); Rph12.z is about 26.1 cM distal from the raw1 (smooth awn 1) locus (2).


The seedling reaction type is 0; or a necrotic fleck (1, 2). Heterozygotes show an intermediate reaction to pathogenic isolates of Puccinia hordei (2).
No images

Origin of mutant:

Natural occurrence in Hordeum vulgare subsp. spontaneum, but transferred to the cultivar Triumph (PI 268180) (1, 3).

Mutational events:

Rph12.z in Triumph (GSHO 1590, PI 268180) (1, 3).

Mutant used for description and seed stocks:

Rph12.z in Triumph (GSHO 1590); Rph12.z in Bowman (PI 483237)*4 (GSHO 2145); Rph12.z in Bowman*9 (BW761, NGB 22467). [Renamed Rph9.z based on allelism tests.]


1. Clifford, B.C. 1985. Barley leaf rust. p. 173-205. In W.R. Bushnell and A.P. Roelfs (eds.) The Cereal Rusts, Vol. II. Academic Press, New York.
2. Jin, Y., G.D. Stadler, J.D. Franckowiak, and B.J. Steffenson. 1993. Linkage between leaf rust resistance genes and morphological markers in barley. Phytopathology 83:230-233.
3. Walther, U. 1987. Inheritance of resistance to Puccinia hordei Otth in the spring barley variety Trumpf. Cereal Rusts Powdery Mildews Bull. 15:20-26.


J.D. Franckowiak and Y. Jin. 1997. Barley Genet. Newsl. 26:281.