International Database for Barley Genes and Barley Genetic Stocks
BGS 628, Shrunken endosperm xenia 7, sex7
Stock number: BGS 628
Locus name: Shrunken endosperm xenia 7
Locus symbol: sex7
Previous nomenclature and gene symbolization:
Shrunken endosperm xenia-i = sex.i (2).
Monofactorial recessive (2).
Located in chromosome 5HL (2); sex7.i is based on linkage drag with the raw2 (smooth awn 2) locus (2).
Starting at the hard dough stage, the grain develops a depression in the dorsal or lemma side. This depression is very distinct at maturity. In plants heterozygous at the sex7 locus, a xenia pattern of expression is observed. The expression of sex7 is much stronger than that of lys1 (high lysine 1), the only other shrunken endosperm xenia mutant located near the raw1 (smooth awn 1) locus (1).
Origin of mutant:
A spontaneous mutant in a selection from cross I90-374 (Bowman*5/Mut. 2612) (1).
sex7.i (GSHO 2470) in I90-374-1 (1).
Mutant used for description and seed stocks:
sex7.i (GSHO 2470) in I90-374-1; sex7.i in Bowman (PI 483237)*7 (GSHO 2133, BW847, NGB 22284).
1. Franckowiak, J.D. (Unpublished).
2. 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. 32:129.