International Database for Barley Genes and Barley Genetic Stocks
BGS 143, Shrunken endosperm xenia 8, sex8
Stock number: BGS 143
Locus name: Shrunken endosperm xenia 8
Locus symbol: sex8
Previous nomenclature and gene symbolization:
Shrunken endosperm xenia-j = sex.j (3).
Monofactorial recessive (3).
Located in chromosome 3HS (3); sex8.j is based on linkage drag with the btr1 (non-brittle rachis 1) locus (3); sex8.j is associated with SNP markers 2_1259 to 2_0093 (positions 69.14 to 127.914 cM) in 3H bins 05 to 08 and with SNP markers 2_0653 to 2_117 (positions 199.04 to 203.85 cM) in 5H bin 11 of the Bowman backcross-derived line BW848 (1).
After the hard dough stage, the grain develops a slight depression in the dorsal or lemma side. In plants heterozygous for sex8.j, a xenia pattern of expression is observed. Seeds with a small depression in the dorsal side are homozygous for sex8 (2). Kernels of the Bowman backcross-derived line for sex8.j, BW848, were 10 to 15% lighter than those of Bowman. Grain yields of BW848 were about 3/4 those of Bowman (2).
Origin of mutant:
A spontaneous mutant in a selection from cross I89-633 (lax-69/3*Bowman) (2).
sex8.j (GSHO 2471) in I89-633-1 (2, 3); the origin could be from the Bonus (NGB 14657, PI 189763) mutant lax.69 (NGB 116402).
Mutant used for description and seed stocks:
sex8.j (GSHO 2471) in I89-633-1; sex8.j in Bowman (PI 483237)*6 (GSHO 1945); sex8.j in Bowman*7 (BW848, NGB 22284).
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 Franckowiak, J.D. (Unpublished).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.
J.D. Franckowiak. 2002. Barley Genet. Newsl. 32:93.
J.D. Franckowiak. 2013. Barley Genet. Newsl. 43:90.