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).
Inheritance:
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).
Description:
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).
No images
Origin of mutant:
Likely a sodium azide induced mutant in Alf (NGB 13682) (2).
Mutational events:
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).
References:
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 Franckowiak, J.D. (Unpublished).
Prepared:
J.D. Franckowiak. 2013. Barley Genet. Newsl. 43:102.
