Inheritance of Elevated Palmitate in Soybean Seed Oil
2000
Narvel, James M. | Fehr, Walter R. | Ininda, Jane | Welke, Grace A. | Hammond, Earl G. | Duvick, Daniel N. | Cianzio, Silvia R.
Elevated palmitate in soybean [Glycine max (L.) Merr.] seed oil may be useful for some food and industrial products. Four mutant alleles, fap2, fap2-b, fap4, and fap5, each elevate palmitate to ≈170 g kg⁻¹ compared with ≈110 g kg⁻¹ for common soybean cultivars. A new mutant line, A25, with a palmitate content of ≈170 g kg⁻¹ was developed by treatment of seeds of `Kenwood' with ethyl methanesulfonate. The objective of our study was to determine the genetic control of elevated palmitate in A25. A25 was crossed reciprocally to lines possessing fap1, fap2, fap2-b, fap3, fap4, or fap5 The analysis of reciprocal F₁ and parent seeds from the crosses indicated no maternal effect or dominance for palmitate content. The phenotypic analysis of F₂ seeds and the genotypic analysis of F₂ plants indicated that elevated palmitate in A25 was controlled by an allele, designated fap6, at a single locus that was independent of fap1, fap2, fap3, fap4, and fap5 The combination of fap2-b, fap4, and fap6 resulted in a genotype with seeds that contained up to 398 g kg⁻¹ palmitate.
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