International Database for Barley Genes and Barley Genetic Stocks

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

BGN  42:302 Export to PDF
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).

Inheritance:

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.

Description:

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).

References:

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.

Prepared:

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

Revised:

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


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