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This article in CS

  1. Vol. 9 No. 5, p. 613-615
    Received: Feb 28, 1969

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Performance of Advanced Generations of Autotetraploid Maize (Zea mays L.) Synthetics1

  1. J. w. Dudley and
  2. D. E. Alexander2



Four, five, and nine generations, depending on the synthetic, of four autotetraploid maize (Zea mays L.) synthetics created by the “elongate” method were compared for 2 years at Urbana, Ill. In all four synthetics, percent seed set, yield, plant height, and ear height increased with advancing generations. Large increases occurred between particular cycles followed by cycles where no changes occurred. Possible reasons for this type of increase rather than a steady increase over all cycles are discusse

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