International Database for Barley Genes and Barley Genetic Stocks

BGS 644, NADH nitrate reductase-deficient 8 (molybdenum cofactor), nar8

BGN  35:201
Stock number: BGS 644
Locus name: NADH nitrate reductase-deficient 8 (molybdenum cofactor)
Locus symbol: nar8

Previous nomenclature and gene symbolization:



Monofactorial recessive (3).
Location in chromosome 6HS (1); nar8.z is close to molecular maker ABG378 in 6H bin 01 (1).


The nar8 mutant is characterized by a pleiotropic loss of nitrate reductase and xanthine dehydrogenase activity (3). The homozygote is not viable and mutant must be maintained as a heterozygote (2).
No images

Origin of mutant:

A sodium azide induced mutant in Steptoe (CIho 15229) (2).

Mutational events:

nar8.z (Az73) in Steptoe (CIho 15229) (2).

Mutant used for description and seed stocks:

nar8.z (Az73) in Steptoe.


1. Kleinhofs, A. 1997. Integrated barley RFLP and classical marker maps. Barley Genet. Newsl. 27:105-112.

2. Kleinhofs, A. (Unpublished).

3. Kleinhofs, A., A. Killian, M.A. Saghai Maroof, R.M. Biyashev, P. Hayes, F.Q. Chen, N. Lapitan, A. Fenwick, T.K. Blake, V. Kanazin, L. Dahleen, D. Kudrna, J. Bollinger, S.J. Knapp, B. Liu, M. Sorrells, M. Heun, J.D. Franckowiak, D. Hoffman, R. Skadsen, and B.J. Steffenson. 1993. A molecular, isozyme and morphological map of the barley (Hordeum vulgare) genome. Theor. Appl. Genet. 86:705-712.


A. Kleinhofs. 2005. Barley Genet. Newsl. 35:202.