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Lipids ; 55(5): 469-477, 2020 09.
Article in English | MEDLINE | ID: mdl-32542681

ABSTRACT

Soybean (Glycine max) meal is an important protein source. Soybean meal with lower phytate and oligosaccharides improves meal quality. A single recessive mutation in soybean myo-inositol 1-phosphate synthase (Gm-lpa-TW75-1) confers a seed phenotype with low phytate and increased inorganic phosphate. The mutant was crossed with high oil lines expressing a diacylglycerol acyltransferase1 (DGAT) gene from Vernonia galamensis (VgD). Gm-lpa-TW75-1 X VgD, designated GV, has 21%, and 22% oil and 41% and 43% protein from field and greenhouse seed production, respectively. No significant differences were found in mineral concentrations except for Fe which was 229 µg/g dry mass for GV followed by 174.3 for VgD and 162 for Gm-lpa-TW75-1. Phosphate (Pi) is higher in Gm-lpa-TW75-1 as expected at 5 mg/g, followed by GV at 1.6 mg/g whereas Jack, VgD, and Taiwan75 have about 0.3 mg/g. The Gm-lpa-TW75-1 line has the lowest phytate concentration at 1.4 mg/g followed by GV with 1.8 mg/g compared to Taiwan75, VgD, and Jack with 2.5 mg/g. This work describes a high oil and protein soybean line, GV, with increased Pi and lower phytate which will increase the nutritional value for human and animal feed.


Subject(s)
Diacylglycerol O-Acyltransferase/genetics , Glycine max/enzymology , Myo-Inositol-1-Phosphate Synthase/genetics , Plants, Genetically Modified/genetics , Gene Knockout Techniques , Inositol Phosphates/metabolism , Mutation/genetics , Plants, Genetically Modified/growth & development , Seeds/genetics , Seeds/growth & development , Glycine max/genetics , Glycine max/growth & development , Vernonia/enzymology , Vernonia/genetics
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