A fap7 Allele for Elevated Palmitate in Soybean

Stoltzfus, David L.; Fehr, Walter R.; Welke, Grace A.; Hammond, Earl G.; Cianzio, Silvia R.

A fap7 Allele for Elevated Palmitate in Soybean

2000

Stoltzfus, David L. | Fehr, Walter R. | Welke, Grace A. | Hammond, Earl G. | Cianzio, Silvia R.

Soybean [Glycine max (L.) Merr.] oil with elevated palmitate content may be useful for food and industrial applications requiring oil with high oxidative stability. The mutant line A30 with ≈ 40 g kg⁻¹ greater palmitate content than conventional soybean oil was developed by treating seeds of the line A89-144026 with N-nitroso-N-methyl urea. This study was conducted to determine the genetic control of elevated palmitate content in A30. Crosses were made between A30, its parent, and lines possessing the fap1, fap2-b, fap3, fap4, fap5, or fap6 alleles for altered palmitate. The F₁ seeds from reciprocal crosses between A30 and A89-144026 did not exhibit maternal effects or dominance for palmitate content. The phenotypic and genotypic analyses of F₂ seeds and F₃ progeny indicated that A30 had an elevated palmitate allele, designated fap7, with additive gene action at a single locus. The fap7 locus was independent of fap1, fap2-b, fap3, fap4, and fap5, but closely linked to the fap6 locus. The new allele can be used in combination with other alleles that control fatty ester composition to obtain unique oils for possible food and industrial applications.

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