International Database for Barley Genes and Barley Genetic Stocks
BGS 397, Shrunken endosperm genetic 7, seg7
Stock number: BGS 397
Locus name: Shrunken endosperm genetic 7
Locus symbol: seg7
Previous nomenclature and gene symbolization:
Shrunken endosperm = se7 (4).
Inheritance:
Monofactorial recessive (3).
Location is unknown.
Description:
Seed size is reduced less than other seg mutants, but the degree reduction is affected by environment. Seed weights of 40, 75, and 90% of normal are reported for plants grown in the field in Arizona, in the field in Montana, and in the greenhouse in Arizona, USA, respectively (4). Pollen mother cell meiosis and pollen fertility are normal. Seed from seg7.h plants can be used to establish stands under field conditions (4). The shrunken endosperm trait was very difficult to detect in the crosses to Bowman (2). Light microscopy revealed that seg7 mutants exhibited premature termination of grain filling because of the necrosis and crushing of the chalazal and nucellar projection of the pericarp early during grain filling (1).
No images
Origin of mutant:
A spontaneous mutant in Ingrid (NGB 2671, CIho 10083) (3).
Mutational events:
seg7.h (GSHO 2468) in Ingrid (NGB 2671, CIho 10083) (4).
Mutant used for description and seed stocks:
seg7.h (GSHO 2468) in Ingrid; seg7.h in Bowman (PI 483237)*3 (GSHO 2352); seg7.h in Bowman*2 (BW839, NGB 22276).
References:
1. Felker, F.C., D.M. Peterson, and O.E. Nelson. 1985. Anatomy of immature grains of eight material effect shrunken endosperm barley mutants. Amer. J. Bot. 72:248-256.
2. Franckowiak, J.D. (Unpublished).
3. Ramage, R.T., and R.F. Eslick. 1975. BGS 397, Shrunken endosperm, xenia, se7. Barley Genet. Newsl. 5:115.
4. Ramage, R.T., and J.F. Scheuring. 1976. Shrunken endosperm mutants seg6 and seg7. Barley Genet. Newsl. 6:59-60.
Prepared:
R.T. Ramage and R.F. Eslick. 1975. Barley Genet. Newsl. 5:115.
Revised:
R.T. Ramage and R.F. Eslick. 1976. Barley Genet. Newsl. 6:142.
T. Tsuchiya. 1980. Barley Genet. Newsl. 10:131.
J.D. Franckowiak. 1997. Barley Genet. Newsl. 26:345.
J.D. Franckowiak. 2007. Barley Genet. Newsl. 37:269.
