International Database for Barley Genes and Barley Genetic Stocks

BGS 70, Reaction to Puccinia hordei 1 (barley leaf rust), Rph1

BGN  26:107
Stock number: BGS 70
Locus name: Reaction to Puccinia hordei 1 (barley leaf rust)
Locus symbol: Rph1

Previous nomenclature and gene symbolization:

Resistance to Puccinia hordei = Pa1 (9).
Resistance to Puccinia hordei C = C (3).
Resistance to Puccinia hordei Otth = Pa (3, 5).
Resistance to Puccinia hordei Otth = Rph1a (4).


Monofactorial incomplete dominant (2, 3).
Located in chromosome 2H (7); probably in the short arm (6); associated with SNP markers 1_0326 to 2_1416 (positions 16.91 to 22.35 cM) in 2HS of the Bowman backcross-derived line BW682 (1), likely in 2H bin 02.


The seedling reaction type is 0;n - 1c with race 4 culture 57-19 (5); heterozygotes have reaction types ranging from 1 to 3, depending on parents (5, 6). Responses will vary for homozygotes and heterozygotes when different rust cultures are tested (6).
No images

Origin of mutant:

Natural occurrence in Manchuria (CIho 2947) (2, 8).

Mutational events:

Rph1.a in Manchuria (CIho 2947) (5, 8); Rph1.a in Cape (PI 39403), OAC 21 (CIho 1470) (8); Rph1.a in Oderbrucker (CIho 940) (9); Rph1.a in Sudan (CIho 6489), Speciale (CIho 7536) (2, 5).

Mutant used for description and seed stocks:

Rph1.a in Oderbrucker (GSHO 1313); Rph1.a from Sudan in Bowman*6 (PI 643150, BW682, NGB 22398).


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 Phys.155:617-627.
2. 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.
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. Roane, C.W. 1976. BGS 70, Resistance to Puccinia hordei Otth, Rph1a. BGN 6:120.
5. Roane, C.W., and T.M. Starling. 1967. Inheritance of reaction to Puccinia hordei in barley. II. Gene symbols for loci in different cultivars. Phytopathology 57:66-68.
6. Roane, C.W., and T.M. Starling. 1989. Linkage studies with genes conditioning leaf rust reaction in barley. Barley Newsl. 33:190-192.
7. Tuleen, N.A., and M.E. McDonald. 1971. Location of genes Pa and Pa5. Barley Newsl. 15:106-107.
8. Waterhouse, W.L. 1948. Studies in the inheritance of resistance to rust of barley, II. J. Proc. Royal Soc. New South Wales 81:198-205.
9. Watson, I.A., and F.C. Butler. 1947. Resistance to barley leaf rust (Puccinia anomala Rostr.). Linnean Soc. New South Wales, Proc. 72:379-386.


C.W. Roane. 1976. Barley Genet. Newsl. 6:120.


J.D. Franckowiak and Y. Jin. 1997. Barley Genet. Newsl. 26:107.
J.D. Franckowiak. 2010. Barley Genet. Newsl. 40:52.