THE PLANT CELL, Vol 1, Issue 3 339-350, Copyright © 1989 by American Society of Plant Biologists
Molecular Characterization of an Aberrant Allele for the Gy3 Glycinin Gene: A Chromosomal Rearrangement
T. J. Cho, C. S. Davies, R. L. Fischer, N. E. Turner, R. B. Goldberg and N. C. Nielsen
U.S. Department of Agriculture/Agricultural Research Service, Department of Agronomy, Purdue University, West Lafayette, Indiana 47907
The soybean variety Forrest contains an aberrant allele for the Gy3
glycinin gene. The aberrant allele is designated gy3 because mRNA for the
G3 glycinin subunit is reduced to below detectable amounts in the seed.
Molecular and genetic characterization of gy3 show it to be associated with
a chromosomal rearrangement that causes the 5[prime] halves and 3[prime]
halves of the gene to become separated from one another in the genome. An
inversion is the simplest structural model that accounts for the genetic
and molecular features of the chromosomal rearrangement involving gy3,
although more complex models that involve reciprocal translocations are
also consistent with the data.