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Inheritance of Three Stearic Acid Mutants of Soybean 1
Author(s) -
Graef G. L.,
Fehr W. R.,
Hammond E. G.
Publication year - 1985
Publication title -
crop science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.76
H-Index - 147
eISSN - 1435-0653
pISSN - 0011-183X
DOI - 10.2135/cropsci1985.0011183x002500060043x
Subject(s) - stearic acid , mutant , biology , allele , locus (genetics) , microbiology and biotechnology , genetics , biochemistry , gene , chemistry , organic chemistry
Three mutant lines of soybean [ Glycine max (L.) Merrill] were identified that had three‐ to six‐fold increases in stearic acid content in the seed oil compared with their parents. Our objective was to determine the inheritance of high stearic acid in the three mutants. Reciprocal crosses were made between each mutant and its parent and among the three mutants. Fatty acid analysis of the seed oil of the parents and the F 1 , F 2 , and F 3 generations indicated that high stearic acid in the mutants was controlled by a single locus. The Fas allele for low stearic acid in each parent was partially dominant to the allele for high stearic acid in the mutant derived from it. Crosses among the mutants indicated that each possessed a different allele at the same locus. The allele fas a , in the mutant A6, and fas 6 , in the mutant FA41545, were not dominant to each other. Both fas a and fas b were completely dominant to thefas allele in the mutant A81‐606085. None of the segregates from the mutant ✕ mutant crosses had a stearic acid content outside the range of the parents. Maternal and cytoplasmic effects were not important in the control of stearic acid content in these mutants.