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This article in AJ

  1. Vol. 51 No. 10, p. 608-610

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The Use of Population Subdivision in Effecting a Stratification of Gene Frequencies for Reaction in Alfalfa to Pseudopeziza medicaginis1

  1. M. W. Adams and
  2. G. Semeniuk



Twelve 3-plant groups of alfalfa, composed at random from 36 plants that were uniformly resistant to common leafspot and randomly intercrossed within groups, produced progenies that differed significantly in mean reaction to the disease. This was interpreted to indicate that in critically-sized subdivisions of a breeder's population, the evolutionary force of chance can be employed to effect a gene frequency stratification of the population. The relationship of this effect to inbreeding was noted.

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