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The inheritance of malting quality and agronomic characters in a diallel cross of barley



The inheritance of malting quality and agronomic characters in a diallel cross of barley



Canadian J Genet Cytol 6(2): 178-200



In-heritance of components of malting quality (barley nitrogen, wort nitrogen, malt extract and saccharifying activity) and of agronomic characters (earliness, yield and 1000-kernel weight) was studied in a 12-parent diallel cross of barley. The F1,F2 and F3 of the 66 crosses, together with parents, were grown simultaneously in 4 replications. Malting tests (except those on F1) were made in duplicate. High expression of barley nitrogen tended to be associated with an excess of recessive genes, whereas that of wort nitrogen was associated with equal proportions of dominant and recessive genes. In both cases, complementary gene action was indicated. High expression of malt extract was associated with an excess of dominant genes, without non-allelic interaction. High level of saccharifying activity was related to about equal proportions of dominant and recessive genes, without definite non-allelic interaction. The characters earliness, high yield and high 1000-kernel weight were all dominant, with the days-to-head data (earliness) affected by non-allelic interaction. Correlative studies showed association between earliness and small seed, earliness and high nitrogen, high yield and low nitrogen, high malt extract and low nitrogen. There appear to be no insuperable genetic or physiological barriers to the combining of ideal quality and agronomic expressions in hybrid individuals.

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Accession: 014752172

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DOI: 10.1139/g64-024



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