International Database for Barley Genes and Barley Genetic Stocks

BGS 603, Proanthocyanidin-free 21, ant21

BGN  29:94
Stock number: BGS 603
Locus name: Proanthocyanidin-free 21
Locus symbol: ant21

Previous nomenclature and gene symbolization:



Monofactorial recessive (3, 4).
Located in chromosome 6H, close to the centromere (1).


Under normal growing conditions no anthocyanins are observed in the vegetative parts of the mutant plants. The mutant grains lack proanthocyanidins and no precursors of proanthocyanidins are accumulated. The action of the gene ant21 is unknown, but it might be involved in the regulation of anthocyanin and proanthocyanidin biosynthesis (5, 6).

Origin of mutant:

A sodium azide induced mutant in Georgie (NGB 13683, PI 447012) (2).

Mutational events:

ant21.194 (NGB 13704) in Georgie (NGB 13683, PI 447012) (3); ant21.207 in Hege 876 (4); ant21.271 (NGB 23215) in Secobra 18193 (NGB 13684) (4); ant21.526 in Advance (CIho 15804) (4); ant21.1507 in Amagi-Nijo (3); ant21.1513 (GSHO 1634) in Haruna-Nijo (3); ant21.1514 in Nirakei 61 (4); ant21.1516 in Nirakei 61 (3).

Mutant used for description and seed stocks:

ant21.194 (NGB 13704) in Georgie; ant21.1513 (GSHO 1634) in Haruna-Nijo; ant21.1513 in Bowman (PI 483237)*4 (GSHO 1855); ant21.1513 in Bowman*7 (BW021, NGB 20429).


1. Falk, D.E. 1994. Coordinator's report: Chromosome 6. Barley Genet. Newsl. 23:154.

2. Jende-Strid, B. 1978. Mutation frequencies obtained after sodium azide treatments in different barley varieties. Barley Genet. Newsl. 8:55-57.

3. Jende-Strid, B. 1984. Coordinator's report: Anthocyanin genes. Barley Genet. Newsl. 14:76-79.

4. Jende-Strid, B. 1988. Coordinator's report: Anthocyanin genes. Stock list of ant mutants kept at the Carlsberg Laboratory. Barley Genet. Newsl. 18:74-79.

5. Jende-Strid, B. 1991. Gene-enzyme relations in the pathway of flavonoid biosynthesis in barley. Theor. Appl. Genet. 81:658-674.

6. Jende-Strid, B. 1993. Genetic control of flavonoid biosynthesis in barley. Hereditas 119:187-204.


B. Jende-Strid. 1999. Barley Genet. Newsl. 29:94.