Abstract
Svalof's Pallas barley is an X-ray mutant of the high-yielding Bonus barley variety. Both varieties were released by the Swedish Seed Association, Svalof, and have gained wide distribution. Pallas barley arose as an erectoides mutant in 1947. After careful testing it was approved in 1958 as an original Swedish variety. It soon became widespread over great parts of western Europe owing to its high productivity, pronounced lodging resistance and high nitrogen utilization. Danish tests of barley varieties are recorded and published yearly. From 1958 when Pallas entered the Danish trials, and up to and including 1964, its parent Bonus barley was the official Danish standard variety. In 1965 it was replaced by Pallas barley. A careful biometrical comparison of the two varieties has been made with regard to grain yield, lodging resistance, straw height and strawproduction. In addition, the influence of increased lodging resistance on yield as well as the variance of yield and lodging have been analysed.
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