International Database for Barley Genes and Barley Genetic Stocks

BGS 32, Reaction to Puccinia hordei 9 (barley leaf rust), Rph9

BGN  37:201
Stock number: BGS 32
Locus name: Reaction to Puccinia hordei 9 (barley leaf rust)
Locus symbol: Rph9

Previous nomenclature and gene symbolization:

Resistance to Puccinia hordei Otth 9 = Pa9 (3, 7, 8).
Resistance to Puccinia hordei Otth 9 = Pa9 (2).
Resistance to Puccinia hordei 12 = Rph12 (1, 2, 9).


Monofactorial dominant (1, 5, 6).
Located in chromosome 5HL (5); about 26.1 cM distal from the raw1 (smooth awn 1) locus (5); in 5H bin 11 about 9.3 cM proximal from esterase 9 (Est9) and about 22.5 cM proximal from STS marker ABC155 (1); about 29.2 cM distal from the var1 (variegated 1) locus (1).


Seedling reaction types range from 0; or necrotic fleck to 23- or reduced pustule size (4, 6), but 0; reactions are more common with the Rph9.z allele, formerly Rph12.z (1, 2, 5). The resistant reaction of the Rph9.i allele is temperature sensitive and is inactivated above 20°C (3). Heterozygotes show an intermediate reaction to pathogenic isolates of Puccinia hordei (5). The original cultivar ‘Trumpf’ was also marketed in the United Kingdom as ‘Triumph’.
No images

Origin of mutant:

Natural occurrence in Abyssinian (Hor 2596, CIho 1234) (3, 7); natural occurrence in Hordeum vulgare subsp. spontaneum, but transferred to the cultivar Trumpf (Triumph, PI 548762, GSHO 1590) (2, 9).

Mutational events:

Rph9.i in Abyssinian (Hor 2596, CIho 1234) (3, 7); Rph9.z in Trumpf (PI 548762, GSHO 1590) (2, 9).

Mutant used for description and seed stocks:

Rph9.i in Abyssinian (GSHO 1601); Rph9.i in Bowman (PI 483237)*8 (GSHO 1866, PI 643158, BW760, NGB 22466); Rph9.z in Trumpf (GSHO 1590); Rph9.z in Bowman*4 (GSHO 2145); Rph9.z in Bowman *8 (PI 643161); Rph9.z in Bowman*9 (BW761, NGB 22467).


1. Borovkova, I.G., Y. Jin, and B.J. Steffenson. 1998. Chromosomal location and genetic relationship of leaf rust resistance genes Rph9 and Rph12 in barley. Phytopathology 88:76-80.
2. 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.
3. Clifford, B.C., and A.C.C. Udeogalanya. 1976. Hypersensitive resistance of barley to brown rust (Puccinia hordei Otth). p. 27-29. In Proc. 4th Eur. Medit. Cereal Rusts Conf., Interlaken, Switzerland.
4. Golan, T., Y. Anikster, J.G. Moseman, and I. Wahl. 1978. A new virulent strain of Puccinia hordei. Euphytica 27:185-189.
5. 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.
6. Reinhold, M., and E.L. Sharp. 1982. Virulence types of Puccinia hordei from North America, North Africa and the Middle East. Plant. Dis. 66:1009-1011. 7. Tan, B.H. 1977. A new gene for resistance to Puccinia hordei in certain Ethiopian barleys. Cereal Rust Bull. 5:39-43.
8. Udeogalanya, A.C.C., and B.C. Clifford. 1976. Genetical, physiological and pathological relationships of resistance to Puccinia hordei and P. striiformis in Hordeum vulgare. Trans. Br. Mycol. Soc. 71:279-287.
9. 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. 26:81.
J.D. Franckowiak and Y. Jin. 1997. Barley Genet. Newsl. 26:281 as BGS 333, Reaction to Puccinia hordei 12, Rph12.


J.D. Franckowiak. 2007. Barley Genet. Newsl. 37:201-202.