International Database for Barley Genes and Barley Genetic Stocks

BGS 218, Reaction to Puccinia hordei 4 (barley leaf rust), Rph4

BGN  42:302
Stock number: BGS 218
Locus name: Reaction to Puccinia hordei 4 (barley leaf rust)
Locus symbol: Rph4

Previous nomenclature and gene symbolization:

Resistance to Puccinia hordei D = D (7).
Resistance to Puccinia hordei Otth 4 = Pa4 (8).


Monofactorial dominant (5, 7).
Located in chromosome 1HS (4, 5); Rph4.d is about 16.0 cM distal from the Reg1 (reaction to Erysiphe graminis 1) or Mla locus (3, 4); Rph4.d is associated with SNP marker 2_0479 (position 0.0 cM) in 1HS of the Bowman backcross-derived line BW753, and SNP markers 2_0479 to 1_0654 (positions 0.0 to about 2 cM) in 1HS of the Bowman line BW752) (1), in 1H bin 01.


The seedling reaction type is 0;n - 1c with race 4 culture 57-19. Heterozygotes may have a type 2 or 3 reaction under certain conditions (8). Very few P. hordei isolates produce a resistant reaction to the Rph4 gene even though the gene is present in a number of cultivars (2).
No images

Origin of mutant:

Natural occurrence in Gull (Gold) (NGB 1480, CIho 1145, GSHO 466) and Lechtaler (CIho 11519) (5, 6).

Mutational events:

Rph4.d (GSHO 1314) in Gull (NGB 1480, CIho 1145, GSHO 466) and Lechtaler (CIho 11519 (5, 6); Rph4.d in Franger (CIho 8811) (9).

Mutant used for description and seed stocks:

Rph4.d (GSHO 1314) in Gull; Rph4.d from Gull in Bowman (PI 483237)*2 (GSHO 2322); Rph4.d from Gull in Bowman*6 (BW752, PI 643153, NGB 22458); Rph4.d from Lechtaler in Bowman*6 (GHSO 3419, BW753, NGB 20459).


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. 2010, Genetic Dissection of barley morphology and development. Plant Physiology. Plant Physiol. 155:617-627.
2. Golegaonkar, P.G., D. Singh, and R.F. Park. 2009. Evaluation of seedling and adult plant resistance to Puccinia hordei in barley. Euphytica 166:183-197.
3. Jensen, J., and J.H. Jørgensen. 1974. Genetic linkage map of chromosome 5. II. An experiment with nine widely spaced loci. Barley Genet. Newsl. 4:42-43.
4. McDaniel, M.E., and B.R. Hathcock. 1969. Linkage of the Pa4 and Mla loci in barley. Crop Sci. 9:822.
5. Moseman, J.G., and D.A. Reid. 1961. Linkage relationship of genes conditioning resistance to leaf rust and powdery mildew. Crop Sci. 1:425-427.
6. Moseman, J.G., and C.W. Roane. 1959. Physiologic races of barley leaf rust (Puccinia hordei) isolated in the United States from 1956 to 1958. Plant Dis. Rep. 43:1000-1003.
7. Roane, C.W. 1962. Inheritance of reaction to Puccinia hordei in barley. I. Genes for resistance among North American race differentiating varieties. Phytopathology 52:1288-1295.
8. Roane, C.W., and T.M. Starling. 1967. Inheritance of reaction to Puccinia hordei in barley. II. Gene symbols for loci in differential cultivars. Phytopathology 57:66-68.
9. Roane, C.W., and T.M. Starling. 1970. Inheritance of reaction to Puccinia hordei in barley. III. Genes in the cultivars Cebada Capa and Franger. Phytopathology 60:788-790.


C.W. Roane. 1976. Barley Genet. Newsl. 6:129.


J.D. Franckowiak and Y. Jin. 1997. Barley Genet. Newsl. 26:217.
J.D. Franckowiak. 2012. Barley Genet. Newsl. 42:302-303.