International Database for Barley Genes and Barley Genetic Stocks

BGS 38, Seminudoides 1, smn1

BGN  43:58
Stock number: BGS 38
Locus name: Seminudoides 1
Locus symbol: smn1

Previous nomenclature and gene symbolization:

Seminuoides = smn (4, 5).


Monofactorial recessive (4, 5).
Located in chromosomes 3H or 5H (1); smn1.a is associated with SNP markers 2_0607 to 1_0839 (positions 52.41 to 100.48 cM) in 3H bins 04 to 06 and with SNP markers 2_1324 to 2_0392 (positions 47.40 to 109.27 cM) in 5H bins 04 to 06 of the Bowman backcross-derived line BW871 (1). Previously located in chromosome 7HS (3); based on linkage drag with the ant1 (anthocyanin-less 1) locus (3).


The caryopsis of smn1 plants is not completely covered because gaps develop between the margins of the lemma and palea. Adherence of the lemma and the palea to the pericarp is poor, but the grain does not thresh free from the hull at maturity. Tiller number and grain yield are often reduced (5). Plants of the Bowman backcross-derived line for smn1.a, BW871, had kernels that were slightly shorter and thinner and weighed 10 to 20% 1ess, 4.7 vs. 5.6 mg, than to Bowman kernels. The grain yield of BW871 varied from 1/3 to 3/4 that of Bowman (2).

Origin of mutant:

An X-ray induced mutant in Haisa (PI 197617) (4, 5).

Mutational events:

smn1.a (Mut. 4128, GSHO 1602) in Haisa (PI 197617) (5).

Mutant used for description and seed stocks:

smn1.a (Mut. 4128, GSHO 1602) in Haisa; smn1.a in Bowman (PI 483237)*5 (GSHO 3420, BW871, NGB20786).


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 Franckowiak, J.D. (Unpublished).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. Franckowiak, J.D. 1995. Notes on linkage drag in Bowman backcross derived lines of spring barley. Barley Genet. Newsl. 24:63-70.
4. Scholz, F. 1956. Mutationsversuche an Kulturpflanzen. V. Die Vererbung zweier sich variabel manifestierender Übergangsmerkmale von bespelzter zu nackter Gerste bei röntgeninduzierten Mutanten. Kulturpflanze 4:228-246.
5. Scholz, F., and O. Lehmann. 1958. Die Gaterslebener Mutanten der Saatgerste in Beziehung zur Formenmannigfaltigkeit der Art Hordeum vulgare L.s.l. I. Kulturpflanze 6:123-166.


J.D. Franckowiak and U. Lundqvist. 2002. Barley Genet. Newsl. 32:225.


J.D. Franckowiak and U. Lundqvist. 2013. Barley Genet. Newsl. 43:58.