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This article in CS

  1. Vol. 23 No. 5, p. 924-927
    Received: Sept 15, 1982

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Genetic Analysis of a Null-Allele for Lipoxygenase-3 in Soybean Seeds1

  1. K. Kitamura,
  2. C. S. Davies,
  3. N. Kaizuma and
  4. N. C. Nielsen2



This study describes a major gene which controls lipoxygenase-3 (L-3) activity in soybean [Glycine max (L.) Merr.]. Cultlvars ‘Wasenatsu’ (PI 417 458) and ‘Ichigowase’ (PI 205 085) were found to L-3 by both immunological and electrophoretic methods. The inheritance of this trait was determined from progeny of crosses between Wasenatsu and either ‘Century’ or ‘Raiden’, two cultlvars that contain high levels of L-3. Segregation ratios in F2 and F3 seeds from selfed plants indicated that absence of L-3 was due to a single allele that was recessive to the one controlling the presence of the enzyme. Comparable results have been obtained using progeny from the cross Ichigowase ✕ PI 408 251. The latter parent contains L-3 but lacks L-1. We propose that the dominant allele be called Lx3, whereas the recessive one be designated lx3.

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