HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via Google Scholar Google Scholar Articles by Knapp, S. J. Articles by Crane, J. M. Search for Related Content PubMed Articles by Knapp, S. J. Articles by Crane, J. M. Agricola Articles by Knapp, S. J. Articles by Crane, J. M.

A Dominant Gene Decreases Erucic and Increases Dienoic Acid in the Seed Oils of Meadowfoam Subspecies

Dep. of Crop and Soil Sciences, Oregon State Univ., Corvallis, OR 97331

^* Corresponding author (steven.j.knapp{at}orst.edu).

Meadowfoam (Limnanthes alba Benth.) seed oil is a source of erucic acid (22:1 13) and novel very long-chain fatty acids. The fatty acid profiles of L. alba subspecies are distinctly different. L. alba ssp. versicolor produces significantly more erucic acid and significantly less dienoic acid (22:2) than L. alba ssp. alba. The L. alba ssp. alba profile is the standard for certain meadowfoam oil markets. Because changes in the profile could affect meadowfoam oil markets, we completed a study to elucidate the genetics of erucic and dienoic acid content differences in the subspecies. The fatty acid contents of F₂ and F₃ progeny from an L. alba ssp. alba x L. alba ssp. versicolor (P₁ x P₂) cross were assayed by gas chromatography. P₁ produced 81 g kg^–1 erucic acid and 297 g kg^–1 dienoic acid, whereas P₂ produced 242 g kg^–1 erucic acid and 86 g kg^–1 dienoic acid. There were two non-overlapping erucic by dienoic acid phenotypic classes among 100 F₂ progeny. The phenotypic distribution (79:21) was not significantly different from 3:1 (P = 0.48); thus, these progeny segregated for a dominant gene. This was verified by F₃ progeny tests. Unless markets can tolerate the range of fatty acid compositions found in L. alba germplasm, cultivars with the L. alba ssp. alba fatty acid profile must be developed.

Received for publication October 17, 1997.

This article has been cited by other articles:

				S. Katengam, J. M. Crane, M. B. Slabaugh, and S. J. Knapp Genetic Mapping of a Macromutation and Quantitative Trait Loci underlying Fatty Acid Composition Differences in Meadowfoam Oil Crop Sci., November 1, 2001; 41(6): 1927 - 1930. [Abstract] [Full Text] [PDF]