International Database for Barley Genes and Barley Genetic Stocks

BGS 744, Accordion rachis 5, acr5

BGN  47:187
Stock number: BGS 744
Locus name: Accordion rachis 5
Locus symbol: acr5

Previous nomenclature and gene symbolization:

Accordion rachis 2 = acr-2 (3).


Monofactorial recessive (2, 3).
Located in chromosome 7H (1); acr5.2 is associated with SNP markers 1_0721 to 2_0103 (positions 82.82 to 139.96 cM) in 7H bins 06 to 08 of the Bowman backcross-derived line BW003 (1).


The acr5.2 mutant plants exhibited low plant vigor, elongated rachis internodes, and a reduced number of kernels per spike (3). Plants of the Bowman backcross-derived line for acr5.2, BW003, showed reduced plant vigor (2). Compared to Bowman, rachis internodes of BW003 were slightly longer (5.1 vs. 4.3 mm), plants and awns were slightly shorter, and peduncles were slightly longer. Kernels of BW003 were elongated (11.3 vs. 9.7 mm) and thin (3.4 vs. 3.9 mm) and weighed less (3.5 vs. 5.9 mg). Grain yields of BW003 were highly variable, but never more than half those of Bowman (2).
No images

Origin of mutant:

A neutron induced mutant in Bonus (NGB 14657, PI 189763) (1, 3).

Mutational events:

acr5.2 (NGB 115042) in Bonus (NGB 14657, PI 189763) (2, 3).

Mutant used for description and seed stocks:

acr5.2 (NGB 115042, GSHO 2153) in Bonus; acr5.2 in Bowman (PI 483237)*6 (BW003, NGB 20411).


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. Franckowiak, J.D. (Unpublished).
3. Lundqvist, U. (Unpublished).


U. Lundqvist and J.D. Franckowiak. 2017. Barley Genet. Newsl. 47:187.