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This article in CS

  1. Vol. 21 No. 2, p. 335-338
     
    Received: Feb 1, 1980


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doi:10.2135/cropsci1981.0011183X002100020033x

Inheritance of Dwarfness in Three Oat Crosses and Relationship of Height to Panicle and Culm Length1

  1. H. G. Marshall and
  2. C. F. Murphy2

Abstract

Abstract

A stiff-strawed, dwarf oat (Avena saliva L.) line (CI 8447) was crossed to its parental line (NC 2469), a medium-height cultivar (‘Otee’), and a tall cultivar (PI 258595). All F1 plants were semidwarf for plant height, and all F2 distributions for height were skewed toward the dwarf-parent mean. Variation for plant height was continuous in the F2 populations from all crosses, but F3 families were readily classified into discrete dwarf, tall, and segregating families. The ratios of parental to segregating families fitted those expected for a model with a difference for one gene. The continuous variation for plant height in the F2 and minor variation within parental type F3 families was attributed to minor effects of modifying genes plus environment. The symbol Dw-7 was assigned to the single, partially dominant gene. This gene may be useful in developing semidwarf, lodging-resistant cultivars.

In all three crosses, panicle and culm length were correlated with total plant height and the relationship was linear.

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