International Database for Barley Genes and Barley Genetic Stocks

BGS 576, Reaction to Puccinia hordei 8 (barley leaf rust), Rph8

BGN  26:502 Export to PDF
Stock number: BGS 576
Locus name: Reaction to Puccinia hordei 8 (barley leaf rust)
Locus symbol: Rph8

Previous nomenclature and gene symbolization:

Resistance to Puccinia hordei Otth 8 = Pa8 (3, 4).

Inheritance:

Monofactorial dominant (3).
Location is unknown.

Description:

The seedling reaction type is 1-2 to 2CN with race 8 culture ND8702, depending on environmental conditions. Egypt 4 is susceptible to most isolates of Puccinia hordei (2, 3, 4), but a resistant reaction to a few isolates is reported (1, 3, 4). Resistance is expressed better at 15C than at 20C, and the infection type observed in heterozygotes is often intermediate between those of the parents.
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Origin of mutant:

Natural occurrence in Egypt 4 (CIho 6481) (3, 4).

Mutational events:

Rph8.h in Egypt 4 (CIho 6481, GSHO 1600) (3, 4).

Mutant used for description and seed stocks:

Rph8.h in Egypt 4 (CIho 6481, GSHO 1600); Rph8.h in Bowman (PI 483237)*2 (GSHO 2324); Rph8.h in Bowman*8 (PI 643157, BW760, NGB 22466).

References:

1. Levine, M.N., and W.J. Cherewick. 1952. Studies on dwarf leaf rust of barley. U.S. Dep. Agric. Tech. Bull. 1056. 17 p.

2. 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.

3. 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.

4. Tan, B.H. 1977. A new gene for resistance to Puccinia hordei in certain Ethiopian barleys. Cereal Rust Bull. 5:39-43.

Prepared:

J.D. Franckowiak and Y. Jin. 1997. Barley Genet. Newsl. 26:502.
 


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