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Crop Science Abstract -

Heterosis and Combining Ability in a Diallel Cross Peas1


This article in CS

  1. Vol. 15 No. 4, p. 453-457
    Received: Feb 6, 1974

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  1. E. T. Gritton2



Eight cultivars of peas (Pisum sativum L.) were crossed in diallel, and the parents, Fl's, and F2's, evaluated for 2 years at two locations in Wisconsin. All traits studied except days to bloom showed heterosis and inbreeding depression. Yield heterosis of Fl's based on the midparent averaged 55%, and on the high parent 28%, over locations and years. Both general and specific combining ability were important for days to bloom, plant height, pods/plant, peas/pod, peas/plant, weight/seed, and seed yield. Pods/plant showed some maternal influence, which in turn led to maternal or reciprocal effects for seeds/plant and yield. Days to bloom showed a significant maternal influence in one experiment.

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