International Database for Barley Genes and Barley Genetic Stocks
BGS 195, Shrunken endosperm xenia 9, sex9
Stock number: BGS 195
Locus name: Shrunken endosperm xenia 9
Locus symbol: sex9
Previous nomenclature and gene symbolization:
Shrunken endosperm xenia l = sex.l (1).
Monofactorial recessive (2).
Located in chromosome 4HL (1); sex9.l is associated with SNP markers 1_1180 to 2_0062 (positions 58.13 to 91.93 cM) in 4H bins 05 to 06 and with SNP markers 2_0206 to 1_1381 (positions 9.61 to 11.21 cM) in 5H bin 01 of the Bowman backcross-derived line BW842 (1).
The sex9.l mutant was isolated based on the shrunken endosperm trait in progeny from the second backcross of Alf mutant ant19.109 to Bowman (2). As the kernels matured, they develop a depression in the center of the lemma which becomes gradually more distinct and depressed (2). Plants of the Bowman backcross-derived line for sex9.l, BW842, had kernels that were the same dimensions as those of Bowman, but weighed much less, 3.8 vs. 5.7 mg. BW842 plants headed about 2 days later than Bowman plants and were about 10% shorter. Grain yields of BW842 were averaged about 1/4 those of Bowman and test weights were very low (2).
Origin of mutant:
Likely a sodium azide induced mutant in Alf (NGB 13682) (2).
sex9.l (GSHO 2473) in Alf (NGB 13682) mutant ant19.109 (NGB 13703) (2).
Mutant used for description and seed stocks:
sex9.l (GSHO 2473) in Alf; sex9.l in Bowman (PI 483237)*3 (GSHO 2354), sex9.l in Bowman*7 (BW842, NGB 22279).
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 Franckowiak, J.D. (Unpublished).
J.D. Franckowiak. 2013. Barley Genet. Newsl. 43:102.