International Database for Barley Genes and Barley Genetic Stocks
BGS 575, Reaction to Puccinia hordei 6 (barley leaf rust), Rph6
Stock number: BGS 575
Locus name: Reaction to Puccinia hordei 6 (barley leaf rust)
Locus symbol: Rph6
Previous nomenclature and gene symbolization:
Resistance to Puccinia hordei Otth = X (3, 4).
Resistance to Puccinia hordei Otth = Pax (4).
Inheritance:
Monofactorial dominant, but an allele at the Rph2 (reaction to Puccinia hordei 2) locus is present in the original cultivar (3, 4, 5).
Location is unknown.
Description:
The seedling reaction type is 0;n - 1c with race 4 culture 57-19. Heterozygotes frequently show an intermediate response (type 2 or 3 reaction) to inoculation with pathogen races (3).
No images
Origin of mutant:
Natural occurrence in Bolivia (PI 36360) (2, 3).
Mutational events:
Rph6.f in Bolivia (PI 36360, GSHO 1598) (3, 4).
Mutant used for description and seed stocks:
Rph6.f in Bolivia (PI 36360, GSHO 1598); Rph6.f (without an Rph2 allele) in Bowman (PI 483237)*4 (GSHO 2323) (1); Rph6.f (without an Rph2 allele) in Bowman*8 (PI643155, BW756, NGB 22461).
References:
1. Chicaiza, O., J.D. Franckowiak, and B.J. Steffenson. 1996. Backcross-derived lines of barley differing for leaf rust resistance genes. pp. 198-200. In G.H.J. Kema, R.E. Niks, and R.A. Daamen (eds.) Proc. 9th Eur. & Medit. Cereal Rusts & Mildews Conf. Drukkerij Ponsen en Looijen B.V., Wageningen.
2. Henderson, M.T. 1945. Studies of the sources of resistance and inheritance of reaction to leaf rust, Puccinia anomala Rostr., in barley. Ph.D. Thesis. Univ. of Minnesota, St. Paul.
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., 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.
5. Starling, T.M. 1955. Sources, inheritance, and linkage relationships of resistance to race 4 of leaf rust (Puccinia hordei Otth), race 9 of powdery mildew (Erysiphe graminis hordei El. Marchal), and certain agronomic characters in barley. Iowa State Coll. J. Sci. 30:438-439.
Prepared:
J.D. Franckowiak and Y. Jin. 1997. Barley Genet. Newsl. 26:501.
