International Database for Barley Genes and Barley Genetic Stocks

BGS 53, Albino seedling 2, abo2

BGN  26:89
Stock number: BGS 53
Locus name: Albino seedling 2
Locus symbol: abo2

Previous nomenclature and gene symbolization:

Albino 1 = a1 (2).
Albino seedling 2 = a2 (4).


Monofactorial recessive (1, 2).
Located in chromosome 2HS (4); abo2.b is about 13.0 cM distal from the fch1 (chlorina seedling 1) locus (4); abo2.b is about 5.5 cM proximal from the fch15 (chlorina seedling 15) locus (4); abo2.b is over 9.4 cM distal from the msg2 (male sterile genetic 2) locus (3).


Seedlings lack normal pigmentation; they are white and die at a two or three leaf stage (1, 2). Robertson’s notes indicate that an albino 4 stock [abo4 (a4)] may have been used in his linkage studies instead of the albino 2 stock [abo2 (a2)] (4). The abo2.b gene must be maintained as a heterozygous stock.

Origin of mutant:

A spontaneous mutant in an unknown cultivar (1).

Mutational events:

abo2.b (GSHO 70) in Nilsson-Ehle No 2 (3).

Mutant used for description and seed stocks:

abo2.b (GSHO 70) in Nilsson-Ehle No 2


1. Hallqvist, C. 1926. Koppelungen und synthetische Lethalität bei den Chlorophyllfaktoren der Gerste. Hereditas 8:229-254.
2. Nilsson-Ehle, H. 1922. Über freie Kombination und Koppelung verschiedener Chlorophyllerbeinheiten bei Gerste. Hereditas 3:191-199.
3. Rahman, M.M., and R.F. Eslick. 1975. Linkage of male sterile genes with seedling lethal genes. Barley Genet. Newsl.5:42-44.
4. Robertson, D.W. 1967. Linkage studies of various barley mutations (Hordeum species). Crop Sci. 7:41-42.


T.E. Haus and T. Tsuchiya. 1971. Barley Genet. Newsl.1:113.


T. Tsuchiya. 1980. Barley Genet. Newsl.10:105.
A. Hang and J.D. Franckowiak. 1997. Barley Genet. Newsl.26:89.