Stock number: BGS 604
Locus name: Proanthocyanidin-free 22
Locus symbol: ant22

Previous nomenclature and symbolization:

None.

Monofactorial recessive (4, 5).
Located in chromosome 7HS [1S], closely linked to the dsp1 (dense spike 1) locus (1, 2).

No anthocyanin pigmentation is observed in the vegetative parts of the mutant plants. The testa layers of the grains of the ant22 mutants lack proanthocyanidins and catechins but accumulate homoeriodictyol and chrysoeriol (6, 7). It is likely that the ant22 gene codes for one subunit and the ant17 gene for the other subunit of the dimeric flavanone 3-hydroxylase enzyme, which catalyzes the conversion of flavanones into dihydroflavonols (6, 8).

A sodium azide induced mutant in Hege 802 (3).

ant22.212 in Hege 802 (4); ant22.603 in Harrington (5); ant22.1500, 22.1501, 22.1504 in Amagi-Nijo (4); ant22.1508 in Haruna-Nijo (4).

ant22.1508 in Haruna-Nijo (NGB 13705, GSHO 1635); ant22.1508 in Bowman (PI 483237)*3 (GHSO 1841).

1. Boyd, P.W., and D. E. Falk. 1990. (Personal communications).
2. Franckowiak, J.D. 1999. (Personal communications).
3. Jende-Strid, B. 1978. Mutation frequencies obtained after sodium azidetreatments in different barley varieties. BGN 8:55-57.
4. Jende-Strid, B. 1984. Coordinator's report: Anthocyanin genes. BGN 14:76-79.
5. Jende-Strid, B. 1991. Coordinator's report: Anthocyanin genes. BGN 20:87-88.
6. Jende-Strid, B. 1993. Genetic control of flavonoid biosynthesis in barley. Hereditas 119:187-204.
7. Jende-Strid, B., and K. N. Kristiansen. 1987. Genetics of flavonoid biosynthesis in barley. p. 445-453. In: S. Yasuda and T. Konishi (eds.) Barley Genetics V. Proc. Fifth Int. Barley Genet. Symp., Okayama 1986. Sanyo Press Co., Okayama.
8. Meldgaard, M. 1992. Expression of chalcone synthase, dihydroflavonol reductase, and flavanone 3-hydroxylase in mutants in barley deficient in anthocyanin and proanthocyanidin biosynthesis. Theor. Appl. Genet. 83:695-706.

Prepared:

B. Jende-Strid. 1998. BGN 29:93