Previous nomenclature and symbolization:

None.

Monofactorial. Commonly recessive in the F₁, although some F₁'s tend to be intermediate in height to the parents (1).

Depending partially on environment, genotypes with sdwla range from 10 to 30 cm shorter than normal barley (1,2). Spike length is variable but fully as long as in normal height barley. The stock used for description of the mutant, M21, has the short straw and long spike of the original 'Jotun Mutant' as well as a large culm diameter from another of its parents, 'Vantage' (1,2). The pedigree of the basic stock, M21, is Jotun Mutant/'Kindred'//Vantage.

Induced by radiation in Norwegian cultivar 'Jotun'

Reduced height (sdwla) in 'Jotun' (2).

sdwla in Minn. M21, CI 15481 (2).

1. Ali, M. A. M., 0. Okiror, and D. C. Rasmusson. 1978. Performance of semidwarf barley. Crop Sci. 18:418- 422.
2. Rasmusson, D. C., E. E. Banttari, and J. W. Lambert. 1973. Registration of M21 and M22 semidwarf barley germplasm. Crop Sci. 13:777.

Prepared:

Donald C. Rasmusson, 1988.