NDLI: Effect of Δ9-stearoyl-ACP-desaturase-C mutants in a high oleic background on soybean seed oil composition

Content Provider	Springer Nature Link
Author	Ruddle, Paul Whetten, Rebecca Cardinal, Andrea Upchurch, Robert G. Miranda, Lilian
Copyright Year	2013
Abstract	Two new sources of elevated seed stearic acid were identified and the feasibility of an elevated stearic acid, high oleic acid germplasm was studied. Soybean [Glycine max (L.) Merr.] oil typically contains 2–4 % stearic acid. Oil with at least 20 % stearic acid is desirable because of its improved baking properties and health profile. This study identifies two new sources of high stearic acid and evaluates the interaction of high stearic and oleic acid alleles. TCHM08-1087 and TCHM08-755, high stearic acid ‘Holladay’ mutants, were crossed to FAM94-41-3, a line containing a point mutation in a seed-specific isoform of a Δ9-stearoyl-acyl carrier protein-desaturase (SACPD-C). F2-derived lines were evaluated for fatty acid content in four field environments. Sequencing of SACPDs in TCHM08-1087 and TCHM08-755 revealed distinct deletions of at least one megabase encompassing SACPD-C in both lines. After genotyping, the additive effect for stearic acid was estimated at +1.8 % for the SACPD-C point mutation and +4.1 % for the SACPD-C deletions. Average stearic acid in lines homozygous for the deletions was 12.2 %. A FAM94-41-3-derived line and TCHM08-1087-11, a selection from TCHM08-1087, were crossed to S09-2902-145, a line containing missense mutations in two fatty acid desaturases (FAD2-1A and FAD2-1B). F1 plants were grown in a greenhouse and individual F2 seed were genotyped and phenotyped. No interaction was observed between either FAD2-1A or FAD2-1B and any of the SACPD-C mutant alleles. Seed homozygous mutant for SACPD-C/FAD2-1A/FAD2-1B contained 12.7 % stearic acid and 65.5 % oleic acid while seed homozygous for the SACPD-C deletion and mutant for FAD2-1A and FAD2-1B averaged 10.4 % stearic acid and 75.9 % oleic acid.
Starting Page	349
Ending Page	358
Page Count	10
File Format	PDF
ISSN	00405752
Journal	Theoretical and Applied Genetics
Volume Number	127
Issue Number	2
e-ISSN	14322242
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2013-11-06
Publisher Place	Berlin/Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Plant Breeding/Biotechnology Plant Genetics & Genomics Agriculture Plant Biochemistry Biochemistry Biotechnology
Content Type	Text
Resource Type	Article
Subject	Genetics Medicine Biotechnology Agronomy and Crop Science

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Effect of a novel mutation in a Δ9-stearoyl-ACP-desaturase on soybean seed oil composition

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