Crop Science Journal of Natural Resources and Life Sciences Education
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Published in Crop Sci 23:924-927 (1983)
© 1983 Crop Science Society of America
677 S. Segoe Rd., Madison, WI 53711 USA
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Genetic Analysis of a Null-Allele for Lipoxygenase-3 in Soybean Seeds1

K. Kitamura, C. S. Davies, N. Kaizuma and 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 x 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.

Key Words: Electrophoresis • ELISA • Immunological screening • Seed quality • Linolenic acid • Linoleic acid

1 Cooperative research of USDA-ARS and the Purdue AES. Journal Paper no. 9196 of the AES. Mention of a trademark or proprietary product does not constitute a guarantee or warranty of the product by either the USDA-ARS or Purdue. Financial support from the Am. Soybean Assoc. Res. Found. is gratefuly acknowledged.

2 Respectively, post-doctoral associate, post-doctoral associate, of agronomy, Purdue Univ., professor of plant breeding, Iwate Univ., Morioka, Japan, and associate proffessor of agronomy and research geneticist, USDA-ARS, Purdue Univ., West Lafayette, IN 47907. K. Kitamura is presently senior lecturer of plant breeding at Iwate Univ. Correspondence should be addressed to N.C. Nielsen.

Received for publication September 15, 1982.




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Environmental Quality		 The Plant Genome
Copyright © 1983 by the Crop Science Society of America.