Abstract
Twenty-five barley (Hordeum vulgare and Hordeum distichum L.) and 25 oat (Avena sativa L.) genotypes with a wide range in genetic diversity were performance-tested on summer-fallowed and stubble land for 3 yr. Correlation coefficients between 3-yr mean yields on summer fallow and stubble were 0.70 and 0.91 for barley and oats, respectively. The genotpye × cropping practice interaction for yield was not significant for either barley or oats. Exclusive use of summer-fallow land in performance testing of barley and oats would not preclude identification of high yielding genotypes for stubble cropping. Barley genotypes that were not high yielding on both cropping practices have not been consistently high yielding across environments in regional cooperative tests.
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