International Database for Barley Genes and Barley Genetic Stocks

BGS 135, Erectoides-ii, ert-ii

BGN  45:109
Stock number: BGS 135
Locus name: Erectoides-ii
Locus symbol: ert-ii

Revised locus symbol:

The ert-ii.79 mutant is an allele at the uzu1 (uzu1) or HvBRI1 (Hordeum vulgare brassinosteroid insensitive 1) locus (1, 2). See BGS 102 for more information on the alleles at the uzu1 or HvBRI1 locus.

Previous nomenclature and gene symbolization:

Erectoides-79 = ert-79 (5).


Monofactorial recessive (5, 6).
Located in chromosome 3HL (5, 6); ert-ii.79 is over 6.6 cM distal from the centromere (5, 6); ert-ii.79 is associated with SNP markers 2_1533 to 2_0931 (positions 67.01 to 104.39 cM) in 3H bins 05 to 06 of the Bowman backcross-derived line BW312 (3); the ert-ii.79 allele at the uzu1 (HvBRI1) locus is positioned at 57.1 cM (2) on the barley genome map (9), in 3H bin 06.


Plants are about 1/2 normal height and the spike has an elongated basal rachis internode. Spikes are relatively short and show a slight reduction in rachis internode length with a range of values from 2.7 to 3.0 mm (8). Compared to Bowman, culms of the Bowman backcross-derived line for ert-ii.79, BW312, and their peduncles were about 2/3 normal length. Heading of BW312 was delayed by 1 to 3 days. Kernels were slightly shorter and wider, but kernels weights were similar. Grain yields of BW312 were about half those of Bowman (4). BW312 with ert-ii.79 and BW885 with uzu1.a showed a brassinosteroid signaling-deficient phenotype in a leaf-unrolling test (2). In contrast to its allele uzu1.a, a drastic reduction in culm length was not caused in the ert-ii.79 mutant when grown under high temperatures (2).

Origin of mutant:

An X-ray induced mutant in Bonus (NGB 14657, PI 189763) (5).

Mutational events:

ert-ii.79 (NGB 112678, GSHO 483) in Bonus (NGB 14657, PI 189763) (5, 8).

Mutant used for description and seed stocks:

ert-ii.79 (NGB 112678, GSHO 483) ; in Bonus; ert-ii.79 in Bowman (PI 483237)*7 (GSHO 1982, BW312, NGB 22108).


1. Chono, M., I. Honda, H. Zeniya, K. Yoneyama, D. Saisho, K. Takeda, S. Takatsuto, T. Hoshino and Y. Watanabe. 2003. A semidwarf phenotype of barley uzu results from a nucleotide substitution in the gene encoding a putative brassinosteroid receptor. Plant Physiol. 133:1209-1219.

2. Dockter, C., D. Gruszka, I. Braumann, A. Druka, I. Druka, J. Franckowiak, S. P. Gough, A. Janeczko, M. Kurowska, J. Lundqvist, U. Lundqvist, M. Marzec, I. Matyszczak, A. H. Müller, J. Oklestkova, B. Schulz, S. Zakhrabekova, and M. Hansson. 2014. Induced variations in brassinosteroid genes define barley height and sturdiness, and expand the green revolution genetic toolkit. Plant Physiology 166:1912-1927.

3. 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.

4. Franckowiak, J.D. (Unpublished).

5. Hagberg, A., G. Persson, and A. Wiberg. 1963. Induced mutations in the improvement of self-pollinated crops. p. 105-124. In E. Åkerberg and A. Hagberg (eds.) Recent Plant Breeding Research. Svalöf 1946-1961. Almqvist & Wiksell, Stockholm.

6. Persson, G. 1969. An attempt to find suitable genetic markers for the dense ear loci in barley I. Hereditas 62:25-96.

7. Persson, G. 1969. An attempt to find suitable genetic markers for the dense ear loci in barley II. Hereditas 63:1-28.

8. Persson, G., and A. Hagberg. 1969. Induced variation in a quantitative character in barley. Morphology and cytogenetics of erectoides mutants. Hereditas 61:115-178.

9. The International Barley Genome Sequencing Consortium. 2012. A physical, genetic and functional sequence assembly of the barley genome. Nature 491:711-716.


U. Lundqvist and J.D. Franckowiak. 1997. Barley Genet. Newsl. 26:172.


U. Lundqvist and J.D. Franckowiak. 1997. Barley Genet. Newsl. 45:109-110.