International Database for Barley Genes and Barley Genetic Stocks

BGS 681, Necroticans 10, nec10

BGN  43:184
Stock number: BGS 681
Locus name: Necroticans 10
Locus symbol: nec10

Previous nomenclature and gene symbolization:

Necroticans S1-1, S1-2, S1-3 = necS1-1, necS1-2, necS1-3 (2, 3).


Monofactorial recessive (2, 3).
Located in chromosome 3H (3); co-segregation with Contig4211_at, Contig4212_s_at, and Contig10850_s_, which co-segregate with marker ABG399 in 3H bin 06 (3); nec10.o is associated with SNP markers 2_1145 to 2_0597 (positions 65.96 to 119.10 cM) in 3H bins 05 to 07 of the Bowman backcross-derived line BW611 (1), in 3H bin 06 (3).


The necrotic phenotype is expressed as extensive small brown to black spots extending down the leaf and subsequently dying leaf tips. Black spots are present on awns. Plant vigor is poor. All alleles exhibit enhanced resistance to Puccinia graminis f. sp. tritici races MCC and QCC and P. graminis f. sp. secalis isolate 92-MN-90, but not to stripe rust (Puccinia striiformis f. sp. hordei). Probable candidate gene encodes a cation/proton-exchanging protein and may be Contig4211_at (3).
No images

Origin of mutant:

A fast neutron induced mutant in Steptoe (CIho 1529) (2, 3).

Mutational events:

nec10.o (FN044, necS1-1, GSHO 3607), nec10.ab (FN211, necS1-2, GSHO 3608), (FN303, necS1-3, GSHO 3609) in Steptoe (CIho 1529) (2).

Mutant used for description and seed stocks:

nec10.o (FN044, GSHO 3607), nec10.ab (FN211, GSHO 3608) and (FN303, GSHO 3609) in Steptoe; nec10.o in Bowman (PI 483237)*4 (BW611, NGB 22177).


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. 2011. Genetic dissection of barley morphology and development. Plant Physiol. 155:617-627.

2. Kleinhofs, A. (Unpublished).

3. Zhang, L., L. Lavery, U. Gill, K. Gill, B. Steffenson, G. Yan, X. Chen and A. Kleinhofs. 2009. A cation/proton-exchanging protein is a candidate for the barley NecS1 gene controlling necrosis and enhanced defense response to stem rust. Theor. Appl. Genet. 118:385-397.


A. Kleinhofs and J.D. Franckowiak. 2013. Barley Genet. Newsl. 43:184.