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Crop Science Abstract -

Outscoring Rates in Oat Species Crosses (Avena sativa L. ✕ A. sterilis L.)1


This article in CS

  1. Vol. 18 No. 5, p. 877-878
    Received: Oct 25, 1977

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  1. R. Shorter,
  2. P. Gibson and
  3. K. J. Frey2



Outcrossing percentages were estimated in F3 oat populations from four matings of Avena sativa L. ✕ A. sterilis L. The populations were generated from the original cross and backcross 1 to 5 to the A. sativa parent in each mating. Mean outcrossing averaged across generations ranged from 1.8 to 8.7% for the four matings. Outcrossing values were 2.8, 10.7, 9.1, 4.7, 2.4, and 4.9% in the Bc0, Bc1, Bc2, Bc3, Bc4, and Bc5, respectively.

Calculations showed that outcrossing in oats has a much greater relative effect on retaining heterozygosity in the F5 to F10 generations than it has in F1 to F5.

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