BGS 330, Erectoides-g, ert-g

Erectoides-24 = ert-24 (3).
Brachytic 3 = br3 (12).

Monofactorial recessive (3, 7).
Located in chromosome 1HL (1); ert-g.24 is associated with retained SNP markers 1_1359 to 2_1413 (positions 81.62 to 95.80 cM) in 1H bins 08 and 09 of the Bowman backcross-derived line BW309, but only SNP markers 1_1359 to 1_1256 (positions 81.62 to 82.35 cM) in 1HL match the Bonus haplotype (1), likely in 1H bin 08. Previously located in chromosome 5HL (4, 5, 6, 7); about 4.7 cM proximal from the cer-i (eceriferum-i) locus (8, 9); about 3.1 cM distal from the lax-a (laxatum-a) locus (7, 10).

Compact spikes are caused by reduced rachis internode length, with values from 2.1 to 2.4 mm (7). Awns and lateral spikelets are closely pressed to the spike, the upper part of the straw is spirally twisted, anthers are short and thick, and the ligule is small. Spikes tend to have a whitish color at maturity caused by a dense surface wax covering (7). GA3 treatment of plants as the flag leaf emerges decreases spike density (11). Plants have a brachytic-like appearance (12) and showed slightly reduced seed set. Plants of the Bowman backcross-derived line with ert-g.24, BW309, were slightly shorter than Bowman and rachis internode lengths were 3.3 vs. 4.5 mm. Kernels were slightly shorter and wider than those of Bowman. Kernels weights and grain yields of BW309 tended to be slightly lower (2). Allelism tests are needed to confirm that BW309 contains the ert-g.24 mutant.

An X-ray induced mutant in Bonus (NGB 14657, PI 189763) (3).

ert-g.24 (NGB 112625, GSHO 479), -g.80 (NGB 112679), -g.84 (NGB 112683), -g.90 (NGB 112689) in Bonus (NGB 14657, PI 189763) (3); ert-g.78 (GSHO 480, NGB 112677), -g.92 (NGB 112691) in Bonus (4); ert-g.303 (NGB 112820), -g.349 (NGB 112865), -g.359 (NGB 112875), -g.393 (NGB 112910) in Foma (NGB 14659, CIho 11333) (7).

ert-g.24 (NGB 112625, GSHO 479) in Bonus; ert-g.24 via Wolfe’s Recessive Marker Stock 7.1 in Bowman (PI 483237)*8 (GSHO 2106, BW309, NGB 22105).

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. 2010. Genetic dissection of barley morphology and development. Plant Physiol. 155:617-627.
2. Franckowiak, J.D. (Unpublished).
3. Hagberg, A., Å. Gustafsson, and L. Ehrenberg. 1958. Sparsely contra densely ionizing radiations and the origin of erectoid mutants in barley. Hereditas 44:523-530.
4. 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.
5. Persson, G. 1969. An attempt to find suitable genetic markers for the dense ear loci in barley I. Hereditas 62:25-96.
6. Persson, G. 1969. An attempt to find suitable genetic markers for the dense ear loci in barley II. Hereditas 63:1-28.
7. Persson, G., and A. Hagberg. 1969. Induced variation in a quantitative character in barley. Morphology and cytogenetics of erectoides mutants. Hereditas 61:115-178.
8. Søgaard, B. 1971. Linkage studies on eceriferum mutants in barley. Barley Genet. Newsl. 1:41-47.
9. Søgaard, B. 1974. Three-point tests on chromosome 1 and 7. Barley Genet. Newsl. 4:70-73.
10. Søgaard, B. 1977. The localization of eceriferum loci in barley. IV. Three point tests of genes on chromosome 7 in barley. Carlsberg Res. Commun. 42:35-43.
11. Stoy, V., and A. Hagberg. 1967. Effects of growth regulators on ear density mutants in barley. Hereditas 58:359-384.
12. Tsuchiya, T. 1976. Allelism testing of genes between brachytic and erectoides mutants. Barley Genet. Newsl. 6:79-81.

U. Lundqvist and J.D. Franckowiak. 1997. Barley Genet. Newsl. 26:278.

J.D. Franckowiak and U. Lundqvist. 2011. Barley Genet. Newsl. 41:133-134.