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This article in CS

  1. Vol. 17 No. 5, p. 709-713
     
    Received: Dec 10, 1976


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doi:10.2135/cropsci1977.0011183X001700050009x

Combining Ability in I1 Single Crosses of Red Clover1

  1. P. L. Cornelius,
  2. N. L. Taylor and
  3. M. K. Anderson2

Abstract

Abstract

A diallel cross involving 10 I1 red clover (Trifolium pratense L.) clones was evaluated for survival on four dates over a 3-year period, 1973-75, and vigor of growth on three dates in 1973 and 1974. Significant nonadditive genetic variance was found for survival in 1974 and 1975 and for vigor in 1973. This nonadditive portion of genetic variance was substantially greater than in a previous study involving I0 clones and strengthens the case for production of hybrid red clover. Significant reciprocal effects were found for all traits except vigor in 1974. GCA effects of I1 clones failed to agree with GCA effects of their I0 parents in the previous study, possibly owing to chance selection of inferior I1- segregates from superior Io clones, or to genotype ✕ environment interactions.

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