Abstract
The analysis of array variance and covariance for number of tillers and ears produced per plant was carried out in an 8 × 8 complete diallel cross of barley (Hordeum vulgare L.). Non allelic interactions ascribable to four near isogenic derivatives of a California cultivar distorted the variance-covariance relationship for both characters in two seasons. Removal of the epistatic parents resulted in satisfactory Wr/Vr graphs. A similar manipulation of grain yield data in an earlier study did not produce satisfactory results. The relatively simple inheritance of tiller and ear productivity may have resulted in the successful application of the diallel technique.
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