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Early Generation Inheritance of Malting Quality Characters in a Barley Cross¹

The inheritance of two qualitative and two quantitative characters was studied in the F8 and F, generations of a cross between two varieties of barley (Hordeum vulgare L. emend. Lam.). It was shown that the two qualitative traits, aleurone color and level of free betaamylase, were each controlled by a single gene and that the two genes were independent. The two quantitative characters, nitrogen content and total beta-amylase activity, were found to have high heritabilities and to be positively correlated. It was further discovered that nitrogen content and total beta-amylase activity were both negatively correlated with level of free beta-amylase. Progress from selection for these characters in F.~ could be expected, and genetic variability would remain in the selected lines.

Key Words: heritability • genetic correlation

² Population geneticist, cereal chemist, and barley breeder, respectively.

Received for publication February 8, 1968.