International Database for Barley Genes and Barley Genetic Stocks

BGS 682, Necroticans 11, nec11

BGN  43:185
Stock number: BGS 682
Locus name: Necroticans 11
Locus symbol: nec11

Previous nomenclature and gene symbolization:



Monofactorial recessive (2).
Located in chromosome 1H (1); is in 1H bin 09 (1).


Necrotic phenotype is expressed as blotchy light brown to bleached necrosis progressing until the leaf blade turns yellow and dies starting at the tip. Vigor of plants is good to fair in Steptoe and very good in Morex (2). All three alleles are defective in the barley disease response gene pti1 (serine/threonine kinase Pto-interacting 1) (1). The necrotic phenotype behaves as if controlled by a typical monofactorial recessive gene in crosses with Steptoe; however, when crossed to Morex the segregation ratio in the F2 progeny is closer to 15 normal to 1 necrotic, suggesting that Morex has a dominant gene that suppresses the necrotic phenotype or whose recessive or non-functional allele is required for the expression of the necrotic phenotype. This putative gene has not been characterized (2).

Origin of mutant:

A fast neutron induced mutant in Steptoe (CIho 15229) (2).

Mutational events: (FN227, GSHO 3610), (FN364, GSHO 3611), (FN450, GSHO 3612) in Steptoe (CIho 15229) (2).

Mutant used for description and seed stocks: (FN227, GSHO 3610), (FN364, GSHO 3611), (FN450, GSHO 3612) in Steptoe.


1. Nirmala, J., and A. Kleinhofs (Unpublished).

2. Kleinhofs, A. (Unpublished).


A. Kleinhofs. 2013. Barley Genet. Newsl. 43:185.